- Introduce new officially supported Context API, React.createRef, React.forwardRef, and StrictMode to aid async rendering
- Add new lifecycle methods (getDerivedStateFromProps, getSnapshotBeforeUpdate) with UNSAFE aliases, plus new utility packages (ReactIs, React Lifecycles Compat, Create Subscription, experimental Reconciler)
- Fix assorted browser and SSR bugs, improve error messages, and deprecate ReactDOM.unstable_createPortal in favor of the stable createPortal API
Community impact
Community ratings: 0 Useful, 0 Noise, 0 Risky, 0 Broke, 0 Try.