- Added production error codes with links and enhanced warning messages, including component stack info for PropTypes, key warnings, and unknown DOM property warnings.
- Introduced React.PropTypes.symbol support for ES2015 Symbols and a new invariant for missing instance cases.
- Implemented numerous bug fixes across core, DOM, and performance areas (ref/key coercion, attribute handling, event handling, textarea placeholders, controlled input/select behavior, and various performance regressions).
Community impact
Community ratings: 0 Useful, 0 Noise, 0 Risky, 0 Broke, 0 Try.