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React DOM
- Add support for the Pointer Events specification. (@philipp-spiess in #12507)
- Properly call
getDerivedStateFromProps() regardless of the reason for re-rendering. (@acdlite in #12600 and #12802)
- Fix a bug that prevented context propagation in some cases. (@gaearon in #12708)
- Fix re-rendering of components using
forwardRef() on a deeper setState(). (@gaearon in #12690)
- Fix some attributes incorrectly getting removed from custom element nodes. (@airamrguez in #12702)
- Fix context providers to not bail out on children if there's a legacy context provider above. (@gaearon in #12586)
- Add the ability to specify
propTypes on a context provider component. (@nicolevy in #12658)
- Fix a false positive warning when using
react-lifecycles-compat in <StrictMode>. (@bvaughn in #12644)
- Warn when the
forwardRef() render function has propTypes or defaultProps. (@bvaughn in #12644)
- Improve how
forwardRef() and context consumers are displayed in the component stack. (@sophiebits in #12777)
- Change internal event names. This can break third-party packages that rely on React internals in unsupported ways. (@philipp-spiess in #12629)
React Test Renderer
- Fix the
getDerivedStateFromProps() support to match the new React DOM behavior. (@koba04 in #12676)
- Fix a
testInstance.parent crash when the parent is a fragment or another special node. (@gaearon in #12813)
forwardRef() components are now discoverable by the test renderer traversal methods. (@gaearon in #12725)- Shallow renderer now ignores
setState() updaters that return null or undefined. (@koba04 in #12756)
React ART
- Fix reading context provided from the tree managed by React DOM. (@acdlite in #12779)
React Call Return (Experimental)
- This experiment was deleted because it was affecting the bundle size and the API wasn't good enough. It's likely to come back in the future in some other form. (@gaearon in #12820)
React Reconciler (Experimental)