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This release includes major changes to Flow's model for React. The following links contain detailed documentation on the new model. Defining components Event handling ref functions Typing children Higher-order components Utility type reference Please use the new flow-upgrade tool to upgrade your codebase to take advantage of these changes! Likely to cause new Flow errors: We are modifying how you
What Does React 16 Mean for You? React 16 is the first release that ships with a rewrite of the React core (previously codenamed “Fiber”). This rewrite had a few goals: Remove old internal abstractions that didn’t age well and hindered internal changes. Let us ship some of the most requested features like returning arrays from render, recovering from component errors, and readable component stack
Notable bug fixes: Optimized performance when typechecking classes Optimized performance of sentinel property checks involving large enums Lots of libdef updates! Thanks everyone for the contributions! Misc: Fixed infinite recursion from array spread Added experimental support for sending errors to an IDE over a persistent connection Removed unused --libs flag on status, check, and start commands
15.6.0 (June 13, 2017) React Downgrade deprecation warnings to use console.warn instead of console.error. (@flarnie in #9753) Add a deprecation warning for React.createClass. Points users to create-react-class instead. (@flarnie in #9771) Add deprecation warnings and separate module for React.DOM factory helpers. (@nhunzaker in #8356) Warn for deprecation of React.createMixin helper, which was nev
Likely to cause new Flow errors: We are now sealing the object type that is passed to a React component's props. This means Flow will start complaining if you try and access unknown React props. Strict function call arity checking is now on for everyone! The experimental.strict_call_arity option has been removed. For more, see https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/ Notable bu
React is a JavaScript library for building user interfaces. Declarative: React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable, simpler to understand, and easier to debug. Component-Based: Build encapsu
Likely to cause new Flow errors: Significant fix to matching members of union types. This fix very likely surfaces typechecking issues that were missed before. Check out the blog post for more details Variables in template literals are now subject to the same rules as variables being concatenated with a string using +. This may surface template strings with variables that may not safely coerce to
React Ensure we're using the latest object-assign, which has protection against a non-spec-compliant native Object.assign. (@zpao in #6681) Add a new warning to communicate that props objects passed to createElement must be plain objects. (@richardscarrott in #6134) Fix a batching bug resulting in some lifecycle methods incorrectly being called multiple times. (@spicyj in #6650) React DOM Fix regr
Whoa, a new version of Immutable! The big news is that we now export types for both Flow and TypeScript in the npm module! Also that pesky length warning has finally been fully removed. There are also a good amount of small bug fixes and performance improvements. Finally, the API docs have been improved greatly! Check it out http://facebook.github.io/immutable-js/docs/. A huge huge thanks to every
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