React 19 が npm で利用可能になりました！ この投稿では React 19 の新機能、およびそれらをどのように採用するかについて概説します。

React Conf 2024 で、React Compiler の実験的リリースを発表しました。これは、ビルド時に自動メモ化を通じて React アプリを最適化するツールです。この投稿では、オープンソースの次のステップとコンパイラの進捗状況を共有したいと思います。

先週、ネバダ州ヘンダーソンで 700 人以上の参加者が集まり、最新の UI エンジニアリングについて議論する 2 日間のカンファレンス、React Conf 2024 を開催しました。この投稿では、イベントでの講演と発表をまとめます。

React 19 に追加された改善にはいくつかの破壊的変更が必要ですが、アップグレードをできるだけスムーズに行えるよう努力しているため、ほとんどのアプリには影響が出ないことを予想しています。この投稿では、アプリやライブラリを React 19 にアップグレードする手順をご案内します。

In React Labs posts, we write about projects in active research and development. We’ve made significant progress since our last update, and we’d like to share our progress.

We'd like to offer the React community an option to adopt individual new features as soon as their design is close to final, before they're released in a stable version--similar to how Meta has long used bleeding-edge versions of React internally. We are introducing a new officially supported [Canary release channel](/community/versioning-policy#canary-channel). It lets curated setups like frameworks decouple adoption of individual React features from the React release schedule.

In React Labs posts, we write about projects in active research and development. We've made significant progress on them since our last update, and we'd like to share what we learned.

Today we are thrilled to launch react.dev, the new home for React and its documentation. In this post, we would like to give you a tour of the new site.

React 18 was years in the making, and with it brought valuable lessons for the React team. Its release was the result of many years of research and exploring many paths. Some of those paths were successful; many more were dead-ends that led to new insights. One lesson we’ve learned is that it’s frustrating for the community to wait for new features without having insight into these paths that we’re exploring.

React 18 is now available on npm! In our last post, we shared step-by-step instructions for upgrading your app to React 18. In this post, we'll give an overview of what's new in React 18, and what it means for the future.

As we shared in the release post, React 18 introduces features powered by our new concurrent renderer, with a gradual adoption strategy for existing applications. In this post, we will guide you through the steps for upgrading to React 18.

Last week we hosted our 6th React Conf. In previous years, we've used the React Conf stage to deliver industry changing announcements such as React Native and React Hooks. This year, we shared our multi-platform vision for React, starting with the release of React 18 and gradual adoption of concurrent features.

The React team is excited to share a few updates. We’ve started work on the React 18 release, which will be our next major version. We’ve created a Working Group to prepare the community for gradual adoption of new features in React 18. We’ve published a React 18 Alpha so that library authors can try it and provide feedback...

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.