Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

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Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

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Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

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Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
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3 participants

@imdreamrunner@react-sizebot@rickhanlonii
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 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" + '
Skip to content

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

Copy link
Copy Markdown
Contributor

Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
Copy Markdown

Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

Copy link
Copy Markdown
ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

Labels

Projects

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Development

Successfully merging this pull request may close these issues.

3 participants

@imdreamrunner@react-sizebot@rickhanlonii
, '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('^' + ".*" + '
Skip to content

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

Copy link
Copy Markdown
Contributor

Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
Copy Markdown

Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

Copy link
Copy Markdown
ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
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@imdreamrunner@react-sizebot@rickhanlonii
, '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 > 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

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

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Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
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Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

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ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
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3 participants

@imdreamrunner@react-sizebot@rickhanlonii
, '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

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

Copy link
Copy Markdown
Contributor

Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
Copy Markdown

Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

Copy link
Copy Markdown
ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

Labels

Projects

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Development

Successfully merging this pull request may close these issues.

3 participants

@imdreamrunner@react-sizebot@rickhanlonii
, '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

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

Copy link
Copy Markdown
Contributor

Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
Copy Markdown

Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

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Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
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The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
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Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
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@imdreamrunner@react-sizebot@rickhanlonii
, '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('^' + ".*" + '
Skip to content

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

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Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

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Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

Copy link
Copy Markdown
ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

Labels

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Development

Successfully merging this pull request may close these issues.

3 participants

@imdreamrunner@react-sizebot@rickhanlonii
, '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); } })(); })();
Skip to content

Add react-flight-server-fb package for Meta's internal bundler - #36309

Merged
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main
Apr 27, 2026
Merged

Add react-flight-server-fb package for Meta's internal bundler#36309
imdreamrunner merged 1 commit into
react:mainfrom
imdreamrunner:main

Conversation

@imdreamrunner

@imdreamrunnerimdreamrunner commented Apr 17, 2026

Copy link
Copy Markdown
Contributor

Summary

  • Adds a new react-flight-server-fb package providing RSC Flight bindings for Meta's internal bundler stack
  • Unlike webpack/turbopack integrations, this uses no manifest. Module metadata is self-contained in ClientReference objects and sent over the wire as-is
  • Registers dom-browser-fb and dom-node-fb host configs for Rollup builds targeting FB_WWW_DEV and FB_WWW_PROD

Key design differences from other bundler

  • No build-time manifest
  • Module IDs use Haste module names (e.g. "MyComponent"), with named exports encoded as "Module#export", rather than file paths resolved through a manifest
  • Client-side loading uses Bootloader.handlePayload() + JSResource().load()
  • resolveClientReferenceMetadata and resolveClientReference are pass-throughs

How did you test this change?

E2E integration test is set up on Meta's internal system.

@imdreamrunner
imdreamrunnerforce-pushed the main branch 4 times, most recently from 38b6fd5 to 1d38154CompareApril 17, 2026 17:51
@imdreamrunner
imdreamrunner marked this pull request as ready for review April 17, 2026 17:53
@imdreamrunner
imdreamrunnerforce-pushed the main branch 5 times, most recently from cdc4d48 to 2814e1cCompareApril 23, 2026 03:58
@react-sizebot

react-sizebot commented Apr 23, 2026

Copy link
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Comparing: 561ed52...8895570

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.16%1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=612.85 kB612.85 kB=108.29 kB108.29 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB+0.11%1.88 kB1.89 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=678.78 kB678.78 kB=119.26 kB119.26 kB
facebook-www/ReactDOM-prod.classic.js=698.52 kB698.52 kB=122.73 kB122.73 kB
facebook-www/ReactDOM-prod.modern.js=688.83 kB688.83 kB=121.11 kB121.11 kB
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
facebook-www/ReactFlightClient-dev.classic.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-dev.modern.jsNew file0.00 kB189.48 kBNew file0.00 kB33.44 kB
facebook-www/ReactFlightClient-prod.classic.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightClient-prod.modern.jsNew file0.00 kB61.33 kBNew file0.00 kB11.86 kB
facebook-www/ReactFlightServer-dev.classic.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-dev.modern.jsNew file0.00 kB198.74 kBNew file0.00 kB35.96 kB
facebook-www/ReactFlightServer-prod.classic.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB
facebook-www/ReactFlightServer-prod.modern.jsNew file0.00 kB102.72 kBNew file0.00 kB20.81 kB

Generated by 🚫 dangerJS against 8895570

@imdreamrunner
imdreamrunnerforce-pushed the main branch 2 times, most recently from 58526df to 52ed8aaCompareApril 24, 2026 20:29
@imdreamrunner

Copy link
Copy Markdown
ContributorAuthor

Cache version of GitHub Workflows was bump to set up symlink correctly https://gist.github.com/imdreamrunner/3f4b49cd662140c38e8bfdde57cb167f

@imdreamrunner
imdreamrunner merged commit ad5dfc8 into react:mainApr 27, 2026
237 of 238 checks passed
github-actionsBot pushed a commit that referenced this pull request Apr 27, 2026
<!--
Thanks for submitting a pull request!
We appreciate you spending the time to work on these changes. Please
provide enough information so that others can review your pull request.
The three fields below are mandatory.
Before submitting a pull request, please make sure the following is
done:
1. Fork [the repository](https://github.com/facebook/react) and create
your branch from `main`.
2. Run `yarn` in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (`yarn test`). Tip: `yarn test --watch
TestName` is helpful in development.
5. Run `yarn test --prod` to test in the production environment. It
supports the same options as `yarn test`.
6. If you need a debugger, run `yarn test --debug --watch TestName`,
open `chrome://inspect`, and press "Inspect".
7. Format your code with
[prettier](https://github.com/prettier/prettier) (`yarn prettier`).
8. Make sure your code lints (`yarn lint`). Tip: `yarn linc` to only
check changed files.
9. Run the [Flow](https://flowtype.org/) type checks (`yarn flow`).
10. If you haven't already, complete the CLA.
Learn more about contributing:
https://reactjs.org/docs/how-to-contribute.html
-->
## Summary
<!--
Explain the **motivation** for making this change. What existing problem
does the pull request solve?
-->
- Adds a new react-flight-server-fb package providing RSC Flight
bindings for Meta's internal bundler stack
- Unlike webpack/turbopack integrations, this uses no manifest. Module
metadata is self-contained in ClientReference objects and sent over the
wire as-is
- Registers dom-browser-fb and dom-node-fb host configs for Rollup
builds targeting FB_WWW_DEV and FB_WWW_PROD
Key design differences from other bundler
- No build-time manifest
- Module IDs use Haste module names (e.g. `"MyComponent"`), with named
exports encoded as `"Module#export"`, rather than file paths resolved
through a manifest
- Client-side loading uses `Bootloader.handlePayload()` +
`JSResource().load()`
- `resolveClientReferenceMetadata` and `resolveClientReference` are
pass-throughs
## How did you test this change?
<!--
Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
If you leave this empty, your PR will very likely be closed.
-->
E2E integration test is set up on Meta's internal system.
DiffTrain build for [ad5dfc8](ad5dfc8)
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

Labels

Projects

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Development

Successfully merging this pull request may close these issues.

3 participants

@imdreamrunner@react-sizebot@rickhanlonii