v0.9.0

Official React changelog summary with source attribution, release tags, and community reactions.

Track this React release note alongside related changelog updates, risky changes, and weekly digest signals from the developer community.

React·12 years ago · Mar 4, 2014, 11:10 PMDeprecationMay break your integrationAI-assisted summary

Summary

Added extensive cross‑browser event normalization and new support for SVG tags, attributes, and events (e.g., .currentTarget, .key polyfill, clipboardData, onMouseOver/Out, onLoad/onError).
Introduced breaking API changes: lifecycle methods no longer receive the root node, removed deprecated React.unmountAndReleaseReactRootNode, .getValue() eliminated, renderComponentToString now synchronous, and default prop handling updated.
Fixed numerous bugs and memory leaks, improved stack traces, added React.addons.TestUtils for unit testing, updated JSX whitespace handling with an automated codemod, and performed general performance optimizations.

featurebreakingbugfixdeprecationsource healthy

Official source Last checked 2 hours ago

Loading follow options…

official source

Verify the original release note

Every summary should remain traceable to the original changelog or release source.

AI-assisted summarysource healthyLast checked 2 hours ago

related channels

Turn this React release note into a weekly digest for the tools you actually use.