[flags] Enable enableParallelTransitions - #37290
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Reverse #35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so www.js and www-dynamic.js are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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August 14, 2026 13:44
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Comparing: beef6d6...56b7ba9 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: (No significant changes) |
eps1lon
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Aug 14, 2026
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| // Disables children for <textarea> elements | ||
| export const enableParallelTransitions: boolean = false; | ||
| export const enableParallelTransitions: boolean = true; |
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why not __EXPERIMENTAL__ first?
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It's been on in production at Meta, which generally is a strong signal that it's safe to land. The next thing I want to do is deploy it to some Vercel apps, ASAP so it can make it into 19.3; we can revert fast if something comes up.
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Reverse #35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](eb8feb7)
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Reverse #35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](eb8feb7)
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Reverse react#35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](react@eb8feb7)
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Reverse react#35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](react@eb8feb7)
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Reverse react#35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](react@eb8feb7)
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Reverse react#35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so `www.js` and `www-dynamic.js` are unchanged. Leaving the flag in the repo for now; this just flips the default on. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> DiffTrain build for [eb8feb7](react@eb8feb7)
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react / react-dom / @types/react / @types/react-dom を 19.2.x から 19.3.0 へ上げる。 19.3.0 は 2026-09-09 公開で、pnpm-workspace.yaml の minimumReleaseAge (3 日) を経過している。 動機: Transition の独立描画 (react/react#37290) と useDeferredValue の修正 (react/react#36134) を 前提に、ユーザー操作の Transition 化を進める (後続の ADR-0014)。 検証: mise run verify → Tests 271 passed (271)、build と security-headers 検査を通過。 テスト中の console.warn (useRouter must be used inside a <RouterProvider>) は 19.2.8 の baseline でも同じ 1 件が出ており、この更新とは無関係。 Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
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Reverse #35709. Turn the flag on in the OSS/canary default and in every hardcoded fork, including the native (RN) forks, and keep the test renderers in sync. www stays GK-driven, so
www.jsandwww-dynamic.jsare unchanged.Leaving the flag in the repo for now; this just flips the default on.