[pull] main from react:main#612

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Merged
pull merged 1 commit into from
Jul 21, 2026
Merged

[pull] main from react:main #612

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3 changes: 2 additions & 1 deletion packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js
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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
3 changes: 2 additions & 1 deletion packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}

Expand Down
89 changes: 45 additions & 44 deletions packages/react-server/src/ReactFlightActionServer.js
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
// the implementation details of the action data.
const formData = new FormData();

let action: Promise<(formData: FormData) => T> | null = null;
const seenActions = new Set<string>();
let maybeActionKey: null | string = null;

// $FlowFixMe[prop-missing]
body.forEach((value: string | File, key: string) => {
if (!key.startsWith('$ACTION_')) {
// $FlowFixMe[incompatible-type]
formData.append(key, value);
return;
}
// Later actions may override earlier actions if a button is used to
// override the default form action. However, we don't expect the same
// action ref field to be sent multiple times in legitimate form data.
if (key.startsWith('$ACTION_REF_')) {
if (seenActions.has(key)) {
return;
}
seenActions.add(key);
const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
const metaData = decodeBoundActionMetaData(
body,
serverManifest,
formFieldPrefix,
);
action = loadServerReference(serverManifest, metaData);
return;
}
// A simple action with no bound arguments may appear twice in the form data
// if a button specifies the same action as the default form action. We only
// load the first one, as they're guaranteed to be identical.
if (key.startsWith('$ACTION_ID_')) {
if (seenActions.has(key)) {
return;
}
seenActions.add(key);
const id = key.slice(11);
action = loadServerReference(serverManifest, {
id,
bound: null,
});
return;
} else if (key.startsWith('$ACTION_REF_')) {
// Later actions may override earlier actions if a button is used to
// override the default form action. However, we don't expect the same
// action ref field to be sent multiple times in legitimate form data.
maybeActionKey = key;
} else if (key.startsWith('$ACTION_ID_')) {
// A simple action with no bound arguments may appear twice in the form data
// if a button specifies the same action as the default form action.
maybeActionKey = key;
}
});

if (action === null) {
if (maybeActionKey === null) {
return null;
}
const actionKey = maybeActionKey;

let action: Promise<(formData: FormData) => T> | null = null;
if (actionKey.startsWith('$ACTION_REF_')) {
const formFieldPrefix =
'$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
const metaData = decodeBoundActionMetaData(
body,
serverManifest,
formFieldPrefix,
);
action = loadServerReference(serverManifest, metaData);
} else if (actionKey.startsWith('$ACTION_ID_')) {
const id = actionKey.slice('$ACTION_ID_'.length);
action = loadServerReference(serverManifest, {
id,
bound: null,
});
} else {
throw new Error('Cannot handle action key. This is a bug in React.');
}

// Return the action with the remaining FormData bound to the first argument.
return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
}
// Search through the form data object to get the reference id and the number
// of bound arguments. This repeats some of the work done in decodeAction.
let metaData = null;
let actionKey: null | string = null;
// $FlowFixMe[prop-missing]
body.forEach((value: string | File, key: string) => {
if (key.startsWith('$ACTION_REF_')) {
const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
metaData = decodeBoundActionMetaData(
body,
serverManifest,
formFieldPrefix,
);
actionKey = key;
}
// We don't check for the simple $ACTION_ID_ case because form state actions
// are always bound to the state argument.
});
if (metaData === null) {
if (actionKey === null) {
// Should be unreachable.
return Promise.resolve(null);
}

const formFieldPrefix =
'$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
const metaData = decodeBoundActionMetaData(
body,
serverManifest,
formFieldPrefix,
);

const referenceId = metaData.id;
return Promise.resolve(metaData.bound).then(bound => {
if (bound === null) {
Expand Down
6 changes: 4 additions & 2 deletions packages/react-server/src/ReactFlightServer.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
if (typeof (iterator as any).throw === 'function') {
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}
function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
enqueueFlush(request);
}
if (typeof (iterator as any).throw === 'function') {
// TODO: Premature exits should call return() on the iterator if it exists
// to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
// The iterator protocol doesn't necessarily include this but a generator do.
// $FlowFixMe[prop-missing] should be able to pass mixed
iterator.throw(reason).then(error, error);
iterator.throw(reason).then(noop, noop);
}
}
request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down
3 changes: 2 additions & 1 deletion scripts/error-codes/codes.json
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
"598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
"599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
"600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
"601": "A chunk pair is incomplete. This is a bug in React."
"601": "A chunk pair is incomplete. This is a bug in React.",
"602": "Cannot handle action key. This is a bug in React."
}
Loading
, '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" + '

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[pull] main from react:main#612

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privacy statement. We’ll occasionally send you account related emails.

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to your account

 Merged

pull
merged 1 commit into

from

Jul 21, 2026
 Merged


[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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[pull] main from react:main#612

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pull
merged 1 commit into

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Jul 21, 2026
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[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, '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
[pull] main from react:main#612

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

pull
merged 1 commit into

from

Jul 21, 2026
 Merged


[pull] main from react:main
#612
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Hide file tree
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Failed to load files. 
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, '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" + '

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[pull] main from react:main#612

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 Merged

pull
merged 1 commit into

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Jul 21, 2026
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[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, '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
[pull] main from react:main#612

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

pull
merged 1 commit into

from

Jul 21, 2026
 Merged


[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, '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
[pull] main from react:main#612

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 Merged

pull
merged 1 commit into

from

Jul 21, 2026
 Merged


[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
Expand Down

3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
Loading

, '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
[pull] main from react:main#612

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

pull
merged 1 commit into

from

Jul 21, 2026
 Merged


[pull] main from react:main
#612
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3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -21,6 +21,7 @@ import {
 type ServerReferenceId,
} from '../client/ReactFlightClientConfigBundlerParcel';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -314,7 +315,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -24,6 +24,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -772,7 +773,7 @@ export function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerEdge.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigTurbopackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

Expand Down

3 changes: 2 additions & 1 deletion
packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

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3 changes: 2 additions & 1 deletion
packages/react-server-dom-unbundled/src/server/ReactFlightDOMServerNode.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -766,7 +767,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

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3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerEdge.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ import type {Thenable} from 'shared/ReactTypes';
import type {ClientManifest} from './ReactFlightServerConfigWebpackBundler';
import type {ServerManifest} from 'react-client/src/ReactFlightClientConfig';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -313,7 +314,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

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3 changes: 2 additions & 1 deletion
packages/react-server-dom-webpack/src/server/ReactFlightDOMServerNode.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@ import type {Duplex} from 'stream';

import {Readable} from 'stream';

import noop from 'shared/noop';
import {ASYNC_ITERATOR} from 'shared/ReactSymbols';

import {
Expand DownExpand Up@@ -767,7 +768,7 @@ function decodeReplyFromAsyncIterable<T>(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }

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89 changes: 45 additions & 44 deletions
packages/react-server/src/ReactFlightActionServer.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -112,53 +112,50 @@ export function decodeAction<T>(
 // the implementation details of the action data.
 const formData = new FormData();

 let action: Promise<(formData: FormData) => T> | null = null;
 const seenActions = new Set<string>();
 let maybeActionKey: null | string = null;

 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (!key.startsWith('$ACTION_')) {
 // $FlowFixMe[incompatible-type]
 formData.append(key, value);
 return;
 }
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 if (key.startsWith('$ACTION_REF_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 return;
 }
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action. We only
 // load the first one, as they're guaranteed to be identical.
 if (key.startsWith('$ACTION_ID_')) {
 if (seenActions.has(key)) {
 return;
 }
 seenActions.add(key);
 const id = key.slice(11);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 return;
 } else if (key.startsWith('$ACTION_REF_')) {
 // Later actions may override earlier actions if a button is used to
 // override the default form action. However, we don't expect the same
 // action ref field to be sent multiple times in legitimate form data.
 maybeActionKey = key;
 } else if (key.startsWith('$ACTION_ID_')) {
 // A simple action with no bound arguments may appear twice in the form data
 // if a button specifies the same action as the default form action.
 maybeActionKey = key;
 }
 });

 if (action === null) {
 if (maybeActionKey === null) {
 return null;
 }
 const actionKey = maybeActionKey;

 let action: Promise<(formData: FormData) => T> | null = null;
 if (actionKey.startsWith('$ACTION_REF_')) {
 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 action = loadServerReference(serverManifest, metaData);
 } else if (actionKey.startsWith('$ACTION_ID_')) {
 const id = actionKey.slice('$ACTION_ID_'.length);
 action = loadServerReference(serverManifest, {
 id,
 bound: null,
 });
 } else {
 throw new Error('Cannot handle action key. This is a bug in React.');
 }

 // Return the action with the remaining FormData bound to the first argument.
 return action.then(fn => fn.bind(null, formData));
}
Expand All@@ -175,24 +172,28 @@ export function decodeFormState<S>(
 }
 // Search through the form data object to get the reference id and the number
 // of bound arguments. This repeats some of the work done in decodeAction.
 let metaData = null;
 let actionKey: null | string = null;
 // $FlowFixMe[prop-missing]
 body.forEach((value: string | File, key: string) => {
 if (key.startsWith('$ACTION_REF_')) {
 const formFieldPrefix = '$ACTION_' + key.slice(12) + ':';
 metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );
 actionKey = key;
 }
 // We don't check for the simple $ACTION_ID_ case because form state actions
 // are always bound to the state argument.
 });
 if (metaData === null) {
 if (actionKey === null) {
 // Should be unreachable.
 return Promise.resolve(null);
 }

 const formFieldPrefix =
 '$ACTION_' + actionKey.slice('$ACTION_REF_'.length) + ':';
 const metaData = decodeBoundActionMetaData(
 body,
 serverManifest,
 formFieldPrefix,
 );

 const referenceId = metaData.id;
 return Promise.resolve(metaData.bound).then(bound => {
 if (bound === null) {
Expand Down

6 changes: 4 additions & 2 deletions
packages/react-server/src/ReactFlightServer.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1404,7 +1404,7 @@ function serializeAsyncIterable(
 if (typeof (iterator as any).throw === 'function') {
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 function abortIterable() {
Expand All@@ -1424,9 +1424,11 @@ function serializeAsyncIterable(
 enqueueFlush(request);
 }
 if (typeof (iterator as any).throw === 'function') {
 // TODO: Premature exits should call return() on the iterator if it exists
 // to allow cleanup. See https://tc39.es/ecma262/multipage/control-abstraction-objects.html#table-async-iterator-optional
 // The iterator protocol doesn't necessarily include this but a generator do.
 // $FlowFixMe[prop-missing] should be able to pass mixed
 iterator.throw(reason).then(error, error);
 iterator.throw(reason).then(noop, noop);
 }
 }
 request.cacheController.signal.addEventListener('abort', abortIterable);
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3 changes: 2 additions & 1 deletion
scripts/error-codes/codes.json

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Original file line numberDiff line numberDiff line change
Expand Up@@ -586,5 +586,6 @@
 "598": "Maximum update depth exceeded. This could be an infinite loop. This can happen when a component repeatedly calls setState during render phase or inside useLayoutEffect, causing infinite render loop. React limits the number of nested updates to prevent infinite loops.",
 "599": "Expected an initialized chunk but got an initialized stream chunk instead. This payload may have been submitted by an older version of React.",
 "600": "A rejected Promise was passed to React without a `reason` property. React threw a generic error from where the Promise was used to assist in identifying the problematic Promise. Make sure that instrumented Promises correctly set the `reason` property when setting `status` to `'rejected'`.",
 "601": "A chunk pair is incomplete. This is a bug in React."
 "601": "A chunk pair is incomplete. This is a bug in React.",
 "602": "Cannot handle action key. This is a bug in React."
}
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