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Use stable React 19.3 in Sandpacks - #8650

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Use stable React 19.3 in Sandpacks#8650
samselikoff wants to merge 1 commit into
mainfrom
codex/react-19-3-sandboxes

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@samselikoff

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Summary

  • Replace the temporary September 4 canary pins with stable React 19.3 in the shared and page-specific Sandpacks.
  • Use exact version 19.3.0 for the RSC Sandpack.
  • Keep the historical 2025 React Labs post on its original canary.

Verification

  • yarn lint-heading-ids
  • yarn deadlinks
  • React 19.3 release-post Sandpacks resolve and render
  • Browser and ViewTransition reference Sandpacks resolve and render
  • RSC Sandpacks resolve and render

This is a draft while the Sandpack dependency resolver catches up. As of September 9, standard Sandpacks report Cannot find module react from /src/index.js, and RSC Sandpacks report the same error from /src/rsc-client.js.

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github-actions Bot commented Sep 9, 2026

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Size changes

Details

📦 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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