Hooks FAQ – React
These docs are old and won’t be updated. Go to react.dev for the new React docs. The new documentation pages teaches React with Hooks. Hooks are a new addition in React 16.8. They let you use state and other React features without writing a class. This page answers some of the frequently asked questions about Hooks. Adoption Strategy Which versions of React include Hooks? Do I need to rewrite all
Hooks at a Glance – React
These docs are old and won’t be updated. Go to react.dev for the new React docs. These new documentation pages teach React with Hooks: Quick Start Tutorial react: Hooks Hooks are a new addition in React 16.8. They let you use state and other React features without writing a class. Hooks are backwards-compatible. This page provides an overview of Hooks for experienced React users. This is a fast-pa
Introducing Hooks – React
These docs are old and won’t be updated. Go to react.dev for the new React docs. These new documentation pages teach React with Hooks: Quick Start Tutorial react: Hooks Hooks are a new addition in React 16.8. They let you use state and other React features without writing a class. import React, { useState } from 'react'; function Example() { // Declare a new state variable, which we'll call "count
Introducing the React Profiler – React Blog
React 16.5 adds support for a new DevTools profiler plugin. This plugin uses React’s experimental Profiler API to collect timing information about each component that’s rendered in order to identify performance bottlenecks in React applications. It will be fully compatible with our upcoming time slicing and suspense features. This blog post covers the following topics: Profiling an application Rea
React v16.4.2: Server-side vulnerability fix – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. We discovered a minor vulnerability that might affect some apps using ReactDOMServer. We are releasing a patch version for every affected React minor release so that you can upgrade with no friction. Read on for more details. Short Description Today, we are releasing a fix for a vulnerability we discovered in the react
Update on Async Rendering – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. For over a year, the React team has been working to implement asynchronous rendering. Last month during his talk at JSConf Iceland, Dan unveiled some of the exciting new possibilities async rendering unlocks. Now we’d like to share with you some of the lessons we’ve learned while working on these features, and some rec
Sneak Peek: Beyond React 16 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Dan Abramov from our team just spoke at JSConf Iceland 2018 with a preview of some new features we’ve been working on in React. The talk opens with a question: “With vast differences in computing power and network speed, how do we deliver the best user experience for everyone?” Here’s the video courtesy of JSConf Icela
File Structure – React
Is there a recommended way to structure React projects? React doesn’t have opinions on how you put files into folders. That said there are a few common approaches popular in the ecosystem you may want to consider. Grouping by features or routes One common way to structure projects is to locate CSS, JS, and tests together inside folders grouped by feature or route. common/ Avatar.js Avatar.css APIU
React v16.2.0: Improved Support for Fragments – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. React 16.2 is now available! The biggest addition is improved support for returning multiple children from a component’s render method. We call this feature fragments: Fragments look like empty JSX tags. They let you group a list of children without adding extra nodes to the DOM:
React v16.0 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. We’re excited to announce the release of React v16.0! Among the changes are some long-standing feature requests, including fragments, error boundaries, portals, support for custom DOM attributes, improved server-side rendering, and reduced file size. New render return types: fragments and strings You can now return an
React v15.6.2 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today we’re sending out React 15.6.2. In 15.6.1, we shipped a few fixes for change events and inputs that had some unintended consequences. Those regressions have been ironed out, and we’ve also included a few more fixes to improve the stability of React across all browsers. Additionally, 15.6.2 adds support for the co
Error Handling in React 16 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. As React 16 release is getting closer, we would like to announce a few changes to how React handles JavaScript errors inside components. These changes are included in React 16 beta versions, and will be a part of React 16. By the way, we just released the first beta of React 16 for you to try! Behavior in React 15 and
React v15.5.0 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. It’s been exactly one year since the last breaking change to React. Our next major release, React 16, will include some exciting improvements, including a complete rewrite of React’s internals. We take stability seriously, and are committed to bringing those improvements to all of our users with minimal effort. To that
React v15.4.0 – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today we are releasing React 15.4.0. We didn’t announce the previous minor releases on the blog because most of the changes were bug fixes. However, 15.4.0 is a special release, and we would like to highlight a few notable changes in it. Separating React and React DOM More than a year ago, we started separating React a
Codebase Overview – React
This section will give you an overview of the React codebase organization, its conventions, and the implementation. If you want to contribute to React we hope that this guide will help you feel more comfortable making changes. We don’t necessarily recommend any of these conventions in React apps. Many of them exist for historical reasons and might change with time. Top-Level Folders After cloning
React v15.0 Release Candidate – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Sorry for the small delay in releasing this. As we said, we’ve been busy binge-watching House of Cards. That scene in the last episode where Francis and Claire Underwood ████████████████████████████████████. WOW! But now we’re ready, so without further ado, we’re shipping a release candidate for React v15 now. As a rem
New Versioning Scheme – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today we’re announcing that we’re switching to major revisions for React. The current version is 0.14.7. The next release will be: 15.0.0 This change shouldn’t materially affect most of you. Moving to major semver versions simply helps indicate our commitment to stability and gives us the flexibility to add new backwar
Deprecating JSTransform and react-tools – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today we’re announcing the deprecation of react-tools and JSTransform. As many people have noticed already, React and React Native have both switched their respective build systems to make use of Babel. This replaced JSTransform, the source transformation tool that we wrote at Facebook. JSTransform has been really good
Building The Facebook News Feed With Relay – React Blog
This blog site has been archived. Go to react.dev/blog to see the recent posts. At React.js Conf in January we gave a preview of Relay, a new framework for building data-driven applications in React. In this post, we’ll describe the process of creating a Relay application. This post assumes some familiarity with the concepts of Relay and GraphQL, so if you haven’t already we recommend reading our
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DOM Attributes in React 16 – React Blog