This blog site has been archived. Go to react.dev/blog to see the recent posts. Just three and a half years ago we open sourced a little JavaScript library called React. The journey since that day has been incredibly exciting. Commemorative T-Shirt In order to celebrate 50,000 GitHub stars, Maggie Appleton from egghead.io has designed us a special T-shirt, which will be available for purchase from Teespring only for a week through Thursday, October 6. Maggie also wrote a blog post showing all…| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. With React 16.8, React Hooks are available in a stable release! What Are Hooks? Hooks let you use state and other React features without writing a class. You can also build your own Hooks to share reusable stateful logic between components. If you’ve never heard of Hooks before, you might find these resources interesting: Introducing Hooks explains why we’re adding Hooks to React. Hooks at a Glance is a fast-p...| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. 2020 has been a long year. As it comes to an end we wanted to share a special Holiday Update on our research into zero-bundle-size React Server Components. To introduce React Server Components, we have prepared a talk and a demo. If you want, you can check them out during the holidays, or later when work picks back up in the new year. React Server Components are still in research and development. We are sharing th...| legacy.reactjs.org
A JavaScript library for building user interfaces| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today, we are publishing the first Release Candidate for React 17. It has been two and a half years since the previous major release of React, which is a long time even by our standards! In this blog post, we will describe the role of this major release, what changes you can expect in it, and how you can try this release. No New Features The React 17 release is unusual because it doesn’t add any new developer-fa...| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. To share upcoming changes with our partners in the React ecosystem, we’re establishing official prerelease channels. We hope this process will help us make changes to React with confidence, and give developers the opportunity to try out experimental features. This post will be most relevant to developers who work on frameworks, libraries, or developer tooling. Developers who use React primarily to build user-fac...| legacy.reactjs.org
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 Reading performance data Browsing commits Filtering commits Flame chart Ranked chart Component c...| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today, we are releasing React 17! We’ve written at length about the role of the React 17 release and the changes it contains in the React 17 RC blog post. This post is a brief summary of it, so if you’ve already read the RC post, you can skip this one. No New Features The React 17 release is unusual because it doesn’t add any new developer-facing features. Instead, this release is primarily focused on making...| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. Although React 17 doesn’t contain new features, it will provide support for a new version of the JSX transform. In this post, we will describe what it is and how to try it. What’s a JSX Transform? Browsers don’t understand JSX out of the box, so most React users rely on a compiler like Babel or TypeScript to transform JSX code into regular JavaScript. Many preconfigured toolkits like Create React App or Next...| legacy.reactjs.org
This blog site has been archived. Go to react.dev/blog to see the recent posts. Today we are releasing React 16.13.0. It contains bugfixes and new deprecation warnings to help prepare for a future major release. New Warnings Warnings for some updates during render A React component should not cause side effects in other components during rendering. It is supported to call during render, but only for the same component. If you call during a render on a different component, you will now see a…| legacy.reactjs.org