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[noop] Fix createContainer argument order in the Fiber implementation - #35945

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eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
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function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
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}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
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} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
[noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

Conversation

@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Choose a reason for hiding this comment

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

Conversation

@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

Copy link
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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

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@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

Conversation

@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

Copy link
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CollaboratorAuthor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

Conversation

@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
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oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Generated by 🚫 dangerJS against 8127022

@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

Copy link
Copy Markdown
CollaboratorAuthor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

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@eps1lon@react-sizebot@unstubbable
, 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); [noop] Fix `createContainer` argument order in the Fiber implementation by eps1lon · Pull Request #35945 · react/react · GitHub
Skip to content

[noop] Fix createContainer argument order in the Fiber implementation - #35945

Merged
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config
Mar 4, 2026
Merged

[noop] Fix createContainer argument order in the Fiber implementation#35945
eps1lon merged 6 commits into
react:mainfrom
eps1lon:sebbie/03-02-_noop_match_fiber_host_config

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@eps1lon

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...and fix most of the type issues in the Fiber implementation of react-noop-renderer

Stacked on #35944

Only addressed the most obvious issues. There's still some issues relating to loosely accessing object properties but those don't feel urgent. Especially because this is a test-only renderer.

The argument order of createContainer was the main concern.

@github-actionsgithub-actionsBot added the React Core Team Opened by a member of the React Core Team label Mar 2, 2026
@react-sizebot

react-sizebot commented Mar 2, 2026

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Comparing: 5e42791...8127022

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=1.88 kB1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js=611.79 kB611.79 kB=108.12 kB108.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js=6.84 kB6.84 kB=1.88 kB1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js=677.72 kB677.72 kB=119.08 kB119.08 kB
facebook-www/ReactDOM-prod.classic.js=697.67 kB697.67 kB=122.58 kB122.58 kB
facebook-www/ReactDOM-prod.modern.js=687.98 kB687.98 kB=120.96 kB120.96 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.53 kB43.55 kB+12.85%7.17 kB8.09 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.76%7.18 kB8.10 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+12.99%38.65 kB43.67 kB+12.77%7.19 kB8.11 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name+/-BaseCurrent+/- gzipBase gzipCurrent gzip
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.development.js+13.54%42.81 kB48.61 kB+12.24%7.74 kB8.68 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.63 kB+12.14%7.77 kB8.71 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer.development.js+13.53%42.84 kB48.64 kB+12.16%7.77 kB8.72 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.49%42.95 kB48.75 kB+12.20%7.76 kB8.70 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.77 kB+12.11%7.79 kB8.73 kB
oss-experimental/react-noop-renderer/cjs/react-noop-renderer-persistent.development.js+13.48%42.98 kB48.78 kB+12.11%7.79 kB8.73 kB
oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer.production.js+13.04%38.49 kB43.51 kB+12.94%7.13 kB8.06 kB
oss-stable/react-noop-renderer/cjs/react-noop-renderer.production.js+13.03%38.52 kB43.54 kB+12.84%7.16 kB8.08 kB
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oss-stable-semver/react-noop-renderer/cjs/react-noop-renderer-persistent.production.js+13.00%38.62 kB43.64 kB+12.88%7.15 kB8.07 kB
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@eps1loneps1lon changed the title [noop] Fix createContainer argument order[noop] Fix createContainer argument order in the Fiber implementationMar 2, 2026
jest.restoreAllMocks();
});

// @gate enableViewTransition || fb

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Outside of enableViewTransition, <ViewTransition> is rendered as a Scope Component due to how messy feature flags are with switch statements:

https://github.com/facebook/react/blob/fe1ec4f1f3616a3188908863a101baae1027f561/packages/react-reconciler/src/ReactFiber.js#L625-L634

This used to just pass the test since react-noop-renderer didn't throw when Scope host config APIs were used. Now we do so the test fails in fb builds that have enableViewTransition off but enableScope on.

@eps1lon
eps1lon marked this pull request as ready for review March 2, 2026 22:33
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 5374ae3 to 05bf806CompareMarch 4, 2026 12:54
Notable `now` and `logRecoverableError` were removed
due to being unused by Fiber.
The rest is either adding throwing shims for missing
host config properties or using the shared shims
when the whole feature isn't implemented.
They can't be imported from `react-reconciler`
since that package is treated as an external of react-noop-renderer
@eps1lon
eps1lonforce-pushed the sebbie/03-02-_noop_match_fiber_host_config branch from 05bf806 to 8127022CompareMarch 4, 2026 13:07
@eps1lon
eps1lon merged commit 3bc2d41 into react:mainMar 4, 2026
236 checks passed
@eps1lon
eps1lon deleted the sebbie/03-02-_noop_match_fiber_host_config branch March 4, 2026 13:20
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
github-actionsBot pushed a commit to code/lib-react that referenced this pull request Mar 8, 2026
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@eps1lon@react-sizebot@unstubbable