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Document Strict Mode hydration behavior in React 19.3 - #8651

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codex/react-19-3-strict-mode-hydration
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Document Strict Mode hydration behavior in React 19.3#8651
samselikoff wants to merge 1 commit into
mainfrom
codex/react-19-3-strict-mode-hydration

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@samselikoff

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Summary

  • document that React 19.3 double-invokes Effects in Strict Mode during hydration
  • clarify that this matches the existing behavior for client-rendered roots
  • link to the underlying React change

Verification

  • yarn lint-heading-ids
  • yarn deadlinks

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github-actions Bot commented Sep 9, 2026

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Size changes

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📦 Next.js Bundle Analysis for react-dev

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌

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