Last week we hosted React Conf 2025 where we announced the React Foundation and showcased new features coming to React and React Native. React Conf 2025 was held on October 7-8, 2025, in Henderson, Nevada. The entire day 1 and day 2 streams are available online, and you can view photos from the event here. In this post, we’ll summarize the talks and announcements from the event. Day 1 Keynote Watc
皆さんこんにちは。React、使っていますか？ Reactを″正しく”使うことは難しいと感じる方も多いのではないでしょうか。 特に筆者はReactの正しい使い方に厳しく、こんな記事も出しています。熟練のReact使いでもなければ、この記事を読んで難しいと思うのも仕方がありません。 useEffectに関しては、React公式のドキュメントでも「そのエフェクトは不要かも」というページがあり、useEffectを使ってしまいがちだが、useEffectの使用が適していない場面について解説されています。 この記事の目的 上記の公式ドキュメントで解説されている中でもkeyを使うテクニック（あとでこの記事でも説明します）に関しては、今より未熟だった昔の筆者は、あまり良く思っていませんでした。なぜなら、それが 「Reactらしくない、小手先のテクニック」 に見えたからです。 しかし、よくよく考えれば、
React Compiler 1.0 is available today. Compiler-powered lint rules ship in eslint-plugin-react-hooks’s recommended and recommended-latest preset. We’ve published an incremental adoption guide, and partnered with Expo, Vite, and Next.js so new apps can start with the compiler enabled. We are releasing the compiler’s first stable release today. React Compiler works on both React and React Native, an
Today we're excited to release React Native 0.82: the first React Native that runs entirely on the New Architecture. This is a milestone release for React Native and we believe it's the start of a new era. In future versions we will be removing the remaining code from the Legacy Architecture to reduce install size and streamline the codebase. In addition, 0.82 also ships with an experimental opt-i
Today, we’re announcing our plans to create the React Foundation and a new technical governance structure. We open sourced React over a decade ago to help developers build great user experiences. From its earliest days, React has received substantial contributions from contributors outside of Meta. Over time, the number of contributors and the scope of their contributions has grown significantly.
When an Activity boundary is hidden, React will visually hide its children using the display: "none" CSS property. It will also destroy their Effects, cleaning up any active subscriptions. While hidden, children still re-render in response to new props, albeit at a lower priority than the rest of the content. When the boundary becomes visible again, React will reveal the children with their previo
In React 19.2, Activity supports two modes: visible and hidden. hidden: hides the children, unmounts effects, and defers all updates until React has nothing left to work on. visible: shows the children, mounts effects, and allows updates to be processed normally. This means you can pre-render and keep rendering hidden parts of the app without impacting the performance of anything visible on screen
by Tanner Linsley on Sep 23, 2025. TanStack Start has officially reached a v1.0 Release Candidate. This is the build we expect to ship as 1.0, pending your final feedback, docs polish, and a few last-mile fixes. Now’s the perfect time to kick the tires and help us validate the final stretch. When 1.0 ships, we’ll update this post (same URL) with any final notes. Why this matters TanStack Start isn
styled-components is dead, but millions of components still need it. Our performance-focused forks gave Linear 40% faster renders while they plan their escape. Your React app might be 40% slower on first render than it needs to be. Not because you wrote bad code. Not because React is slow. But because styled-components never implemented React 18's useInsertionEffect hook: a feature specifically de
Migrating to React Native's New ArchitectureShopify successfully migrated two of its largest apps, Shopify Mobile and Shopify Point of Sale (POS) to React Native's New Architecture while maintaining weekly releases and serving millions of merchants. This migration involved a complex codebase with hundreds of screens and native modules, extensive custom components, and deep integration with first-p
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Summer might be winding down but we’re definitely not! Back with another release, we have added support for origin-aware overlay animations in Popover and Tooltip, which enable scale transitions to appear as if they are emerging from the trigger. We have also advanced Autocomplete to RC, and added support for filtering GridList, Table, and TagGroup (virtual focus support is still to come). Section
StyleX v0.15.0 introduces significant improvements to media query handling, dynamic styles optimization, and improvements to the linter, types, and documentation. Media query orderingPreviously, media queries within a style property were applied in a predetermined sorting order. This often meant that the order you authored the queries did not match how they were applied, so we recommended manuall
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