Błażej Kustra 53daaf5aba Improve the detection of changed hooks (#35123) ...

## Summary

cc @hoxyq 

Fixes https://github.com/facebook/react/issues/28584. Follow up to PR:
https://github.com/facebook/react/pull/34547

This PR updates getChangedHooksIndices to account for the fact that
`useSyncExternalStore`, `useTransition`, `useActionState`,
`useFormState` internally mounts more than one hook while DevTools
should treat it as a single user-facing hook.

Approach idea came from
[this](https://github.com/facebook/react/pull/34547#issuecomment-3504113776)
comment 😄

Before:


https://github.com/user-attachments/assets/6bd5ce80-8b52-4bb8-8bb1-5e91b1e65043


After:


https://github.com/user-attachments/assets/47f56898-ab34-46b6-be7a-a54024dcefee



## How did you test this change?

I used this component to reproduce this issue locally (I followed
instructions in `packages/react-devtools/CONTRIBUTING.md`).

<details><summary>Details</summary>

```ts

import * as React from 'react';

function useDeepNestedHook() {
  React.useState(0); // 1
  return React.useState(1); // 2
}

function useNestedHook() {
  const deepState = useDeepNestedHook();
  React.useState(2); // 3
  React.useState(3); // 4

  return deepState;
}

// Create a simple store for useSyncExternalStore
function createStore(initialValue) {
  let value = initialValue;
  const listeners = new Set();
  return {
    getSnapshot: () => value,
    subscribe: listener => {
      listeners.add(listener);
      return () => {
        listeners.delete(listener);
      };
    },
    update: newValue => {
      value = newValue;
      listeners.forEach(listener => listener());
    },
  };
}

const syncExternalStore = createStore(0);

export default function InspectableElements(): React.Node {
  const [nestedState, setNestedState] = useNestedHook();

  // 5
  const syncExternalValue = React.useSyncExternalStore(
    syncExternalStore.subscribe,
    syncExternalStore.getSnapshot,
  );

  // 6
  const [isPending, startTransition] = React.useTransition();

  // 7
  const [formState, formAction, formPending] = React.useActionState(
    async (prevState, formData) => {
      return {count: (prevState?.count || 0) + 1};
    },
    {count: 0},
  );

  const handleTransition = () => {
    startTransition(() => {
      setState(Math.random());
    });
  };

  // 8
  const [state, setState] = React.useState('test');

  return (
    <>
      <div
        style={{
          padding: '20px',
          display: 'flex',
          flexDirection: 'column',
          gap: '10px',
        }}>
        <div
          onClick={() => setNestedState(Math.random())}
          style={{backgroundColor: 'red', padding: '10px', cursor: 'pointer'}}>
          State: {nestedState}
        </div>

        <button onClick={handleTransition} style={{padding: '10px'}}>
          Trigger Transition {isPending ? '(pending...)' : ''}
        </button>

        <div style={{display: 'flex', gap: '10px', alignItems: 'center'}}>
          <button
            onClick={() => syncExternalStore.update(syncExternalValue + 1)}
            style={{padding: '10px'}}>
            Trigger useSyncExternalStore
          </button>
          <span>Value: {syncExternalValue}</span>
        </div>

        <form
          action={formAction}
          style={{display: 'flex', gap: '10px', alignItems: 'center'}}>
          <button
            type="submit"
            style={{padding: '10px'}}
            disabled={formPending}>
            Trigger useFormState {formPending ? '(pending...)' : ''}
          </button>
          <span>Count: {formState.count}</span>
        </form>

        <div
          onClick={() => setState(Math.random())}
          style={{backgroundColor: 'red', padding: '10px', cursor: 'pointer'}}>
          State: {state}
        </div>
      </div>
    </>
  );
}
```


</details>

---------

Co-authored-by: Ruslan Lesiutin <28902667+hoxyq@users.noreply.github.com>

2026-01-15 11:06:14 +00:00

..

__tests__

[tests] Require exact error messages in assertConsole helpers (#35497)

2026-01-13 15:52:53 -05:00

ReactDebugHooks.js

Improve the detection of changed hooks (#35123)

2026-01-15 11:06:14 +00:00

ReactDebugTools.js

[Codemod] Update copyright header to Meta (#25315)

2022-10-18 11:19:24 -04:00