Jack Pope

Update isConcurrent RTR option usage

2

Reverting some of https://github.com/facebook/react/pull/27804 which renamed this option to stable. This PR just replaces internal usage to make upcoming PRs cleaner. Keeping isConcurrent unstable for the next major release in...

Add flag to test fast jsx

6

Following #28768, add a path to testing Fast JSX on www. Cleaning up string ref usage on www will be a longer term effort and given the expected win here,...

### Description React is preparing changes, including some breaking, for the [next major release](https://react.dev/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024#the-next-major-version-of-react). There are changes to the Reconciler that break `react-pixi-fiber`. To prepare for the new versions, `react-pixi-fiber`...

Breaking changes in React experimental branch

1

React is preparing changes, including some breaking, for the [next major release](https://react.dev/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024#the-next-major-version-of-react). There are changes to the Reconciler that break `@react-three/fiber`. To repro: - Install react and react-dom @experimental -...

React is preparing changes, including some breaking, for the [next major release](https://react.dev/blog/2024/02/15/react-labs-what-we-have-been-working-on-february-2024#the-next-major-version-of-react). There are changes to the Reconciler that break `react-konva`. To repro: - Install react and react-dom @experimental -...

React 19 Upgrade

8

As described in https://github.com/konvajs/react-konva/issues/799, React 19 has some breaking changes that will require updates from third-party rendering libraries. I needed to get a new build of react-konva with React 19...

Add act documentation

4

Content from legacy docs https://legacy.reactjs.org/docs/test-utils.html#act

Update test warning content

2

- Make it more clear that shallow rendering is not supported - Provide recommendations for incrementally migrating tests before major version upgrade

[compiler] Add JSX inlining optimization

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This adds an `InlineJsxTransform` optimization pass, toggled by the `enableInlineJsxTransform` flag. When enabled, JSX will be transformed into React Element object literals, preventing runtime overhead during element creation. TODO: -...

[compiler] Add validator for extraneous effect deps

1

This PR adds a new validator behind the `validateExtraneousEffectDependencies` config option, default `false`. This is an experimental error log to flag the over-inclusion of values in the effect dep array...