React
- Add error codes to production invariants, with links to the view the full error text. (@keyanzhang in #6948)
- Include component stack information in PropType validation warnings. (@spicyj in #6771)
- Include component stack information in key warnings. (@keyanzhang in #6799)
- Stop validating props at mount time, only validate at element creation. (@keyanzhang in #6823)
- New invariant providing actionable error in missing instance case. (@yungsters in #6990)
- Add
React.PropTypes.symbolto support ES2015 Symbols as props. (@puradox in #6377) - Fix incorrect coercion of ref or key that are undefined in development (@gaearon in #6880)
- Fix a false positive when passing other element’s props to cloneElement (@ericmatthys in #6268)