feat(browser): Add spanStreamingIntegration - #19218

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Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
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feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

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Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all \u003cpre\u003e\u003ccode\u003e blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks"); } } catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); } })(); (function(){ try { var __m = "github.com"; var __re = new RegExp('^' + "github\\.com" + '
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feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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feat(browser): Add spanStreamingIntegration - #19218

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Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length \u003e 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


Generated by Codecov Action

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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
Skip to content

feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


Generated by Codecov Action

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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


Generated by Codecov Action

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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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@Lms24@JPeer264@andreiborza
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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feat(browser): Add spanStreamingIntegration - #19218

Merged
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration
Feb 19, 2026
Merged

feat(browser): Add spanStreamingIntegration#19218
Lms24 merged 8 commits into
lms/feat-span-firstfrom
lms/feat-browser-spanStreamingIntegration

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@Lms24

@Lms24Lms24 commented Feb 6, 2026

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to be merged after #19204

This PR adds the final big building block for span streaming functionality in the browser SDK: spanStreamingIntegation.

This integration:

  • enables traceLifecycle: 'stream' if not already set by users. This allows us to avoid the double-opt-in problem we usually have in browser SDKs because we want to keep integration tree-shakeable but also support the runtime-agnostic traceLifecycle option.
    • to do this properly, I decided to introduce a new integration hook: beforeSetup. This is allows us to safely modify client options before other integrations read it. We'll need this because browserTracingIntegration needs to check for span streaming later on. Let me know what you think!
  • validates that beforeSendSpan is compatible with span streaming. If not, it falls back to static tracing (transactions).
  • listens to a new afterSpanEnd hook. Once called, it will capture the span and hand it off to the span buffer.
  • listens to a new afterSegmentSpanEnd hook. Once called it will flush the trace from the buffer to ensure we flush out the trace as soon as possible. In browser, it's more likely that users refresh or close the tab/window before our buffer's internal flush interval triggers. We don't have to do this but I figured it would be a good trigger point.

While "final building block" sounds nice, there's still a lot of stuff to take care of in the browser. But with this in place we can also start integration-testing the browser SDKs.

ref #17836

@Lms24Lms24 mentioned this pull request Feb 6, 2026
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Codecov Results 📊


Generated by Codecov Action

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size-limit report 📦

PathSize% ChangeChange
@sentry/browser25.64 kBaddedadded
@sentry/browser - with treeshaking flags24.16 kBaddedadded
@sentry/browser (incl. Tracing)42.66 kBaddedadded
@sentry/browser (incl. Tracing, Profiling)47.33 kBaddedadded
@sentry/browser (incl. Tracing, Replay)81.49 kBaddedadded
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags71.11 kBaddedadded
@sentry/browser (incl. Tracing, Replay with Canvas)86.18 kBaddedadded
@sentry/browser (incl. Tracing, Replay, Feedback)98.34 kBaddedadded
@sentry/browser (incl. Feedback)42.36 kBaddedadded
@sentry/browser (incl. sendFeedback)30.31 kBaddedadded
@sentry/browser (incl. FeedbackAsync)35.3 kBaddedadded
@sentry/browser (incl. Metrics)26.81 kBaddedadded
@sentry/browser (incl. Logs)26.96 kBaddedadded
@sentry/browser (incl. Metrics & Logs)27.64 kBaddedadded
@sentry/react27.4 kBaddedadded
@sentry/react (incl. Tracing)45 kBaddedadded
@sentry/vue30.3 kBaddedadded
@sentry/vue (incl. Tracing)44.51 kBaddedadded
@sentry/svelte25.67 kBaddedadded
CDN Bundle28.18 kBaddedadded
CDN Bundle (incl. Tracing)43.5 kBaddedadded
CDN Bundle (incl. Logs, Metrics)29.02 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics)44.33 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics)68.11 kBaddedadded
CDN Bundle (incl. Tracing, Replay)80.33 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)81.24 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback)85.79 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)86.69 kBaddedadded
CDN Bundle - uncompressed82.41 kBaddedadded
CDN Bundle (incl. Tracing) - uncompressed128.77 kBaddedadded
CDN Bundle (incl. Logs, Metrics) - uncompressed85.25 kBaddedadded
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed131.6 kBaddedadded
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed208.91 kBaddedadded
CDN Bundle (incl. Tracing, Replay) - uncompressed245.65 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed248.47 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed258.45 kBaddedadded
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed261.26 kBaddedadded
@sentry/nextjs (client)47.36 kBaddedadded
@sentry/sveltekit (client)43.11 kBaddedadded
@sentry/node-core52.24 kBaddedadded
@sentry/node166.79 kBaddedadded
@sentry/node - without tracing94.02 kBaddedadded
@sentry/aws-serverless109.52 kBaddedadded

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

ScenarioRequests/s% of BaselinePrev. Requests/sChange %
GET Baseline9,024--added
GET With Sentry1,74919%-added
GET With Sentry (error only)6,33270%-added
POST Baseline1,195--added
POST With Sentry60651%-added
POST With Sentry (error only)1,06289%-added
MYSQL Baseline3,316--added
MYSQL With Sentry48215%-added
MYSQL With Sentry (error only)2,66380%-added

Base automatically changed from lms/feat-core-spanBuffer to lms/feat-span-firstFebruary 9, 2026 10:05
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from a294754 to 518df92CompareFebruary 10, 2026 12:41
@Lms24
Lms24 marked this pull request as ready for review February 10, 2026 16:10
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/core/test/lib/tracing/spans/beforeSendSpan.test.ts
Comment threadpackages/core/src/tracing/sentrySpan.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/core/src/client.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/src/integrations/spanstreaming.ts Outdated
Comment threadpackages/browser/test/integrations/spanstreaming.test.ts
Comment thread.size-limit.js
Comment threadpackages/core/src/tracing/sentrySpan.ts
Comment threadpackages/core/src/tracing/trace.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from 28441df to bad8399CompareFebruary 13, 2026 15:29
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 04fbd09 to e14ab4fCompareFebruary 13, 2026 15:40

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

Comment thread.size-limit.js Outdated
Comment threadpackages/core/src/tracing/sentrySpan.ts
@Lms24
Lms24force-pushed the lms/feat-span-first branch from bad8399 to 5a165d4CompareFebruary 16, 2026 17:38
@Lms24
Lms24force-pushed the lms/feat-browser-spanStreamingIntegration branch from 50532e0 to c5156feCompareFebruary 16, 2026 17:38
@Lms24
Lms24 merged commit 434307b into lms/feat-span-firstFeb 19, 2026
427 of 429 checks passed
@Lms24
Lms24 deleted the lms/feat-browser-spanStreamingIntegration branch February 19, 2026 16:38
Lms24 added a commit that referenced this pull request Mar 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 4, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 6, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 10, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 13, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
logaretm pushed a commit that referenced this pull request Mar 18, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 23, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Mar 30, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 2, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 8, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
Lms24 added a commit that referenced this pull request Apr 9, 2026
This PR adds the final big building block for span streaming
functionality in the browser SDK: `spanStreamingIntegation`.
This integration:
- enables `traceLifecycle: 'stream'` if not already set by users. This
allows us to avoid the double-opt-in problem we usually have in browser
SDKs because we want to keep integration tree-shakeable but also support
the runtime-agnostic `traceLifecycle` option.
- to do this properly, I decided to introduce a new integration hook:
`beforeSetup`. This is allows us to safely modify client options before
other integrations read it. We'll need this because
`browserTracingIntegration` needs to check for span streaming later on.
Let me know what you think!
- validates that `beforeSendSpan` is compatible with span streaming. If
not, it falls back to static tracing (transactions).
- listens to a new `afterSpanEnd` hook. Once called, it will capture the
span and hand it off to the span buffer.
- listens to a new `afterSegmentSpanEnd` hook. Once called it will flush
the trace from the buffer to ensure we flush out the trace as soon as
possible. In browser, it's more likely that users refresh or close the
tab/window before our buffer's internal flush interval triggers. We
don't _have_ to do this but I figured it would be a good trigger point.
While "final building block" sounds nice, there's still a lot of stuff
to take care of in the browser. But with this in place we can also start
integration-testing the browser SDKs.
ref #17836
---------
Co-authored-by: Jan Peer Stöcklmair <jan.peer@sentry.io>
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3 participants

@Lms24@JPeer264@andreiborza