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Continue attaching internalInstanceKey to DOM nodes in DEV. This prevents breaking some internal dev tooling while we experiment with the broader change. Note that this does not reference the DOM handle within the flag, just attaches it and deletes it. Internals tracking is still done through the private map.

@meta-cla meta-cla bot added the CLA Signed label Dec 10, 2025
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Comparing: d763f31...14132ef

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable/react-dom/cjs/react-dom.production.js = 6.84 kB 6.84 kB = 1.88 kB 1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js = 608.16 kB 608.16 kB = 107.67 kB 107.67 kB
oss-experimental/react-dom/cjs/react-dom.production.js = 6.84 kB 6.84 kB = 1.88 kB 1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js = 667.39 kB 667.39 kB = 117.55 kB 117.55 kB
facebook-www/ReactDOM-prod.classic.js = 693.47 kB 693.47 kB = 122.05 kB 122.05 kB
facebook-www/ReactDOM-prod.modern.js = 683.89 kB 683.89 kB = 120.43 kB 120.43 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 14132ef

@jackpope jackpope merged commit eade0d0 into facebook:main Dec 10, 2025
245 checks passed
@jackpope jackpope deleted the internal-instance-map-2 branch December 10, 2025 18:35
github-actions bot pushed a commit that referenced this pull request Dec 10, 2025
…35341) Continue attaching `internalInstanceKey` to DOM nodes in DEV. This prevents breaking some internal dev tooling while we experiment with the broader change. Note that this does not reference the DOM handle within the flag, just attaches it and deletes it. Internals tracking is still done through the private map. DiffTrain build for [eade0d0](eade0d0)
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