Temporal is now Stage 4 at TC39 🎂🎂🎂 Thanks to all the other champions of JavaScript's new date-time API. It has been a wild ride over many years! I wrote a blog post explaining how we got here 📜 bloomberg.github.io/js-blog/post...
![Code example showing the usage of Temporal.ZoneddateTime
```js
// London DST starts: 2026-03-29 01:00 -> 02:00
const zdt = Temporal.ZonedDateTime.from(
"2026-03-29T00:30:00+00:00[Europe/London]",
);
console.log(zdt.toString());
// → "2026-03-29T00:30:00+00:00[Europe/London]"
const plus1h = zdt.add({ hours: 1 });
console.log(plus1h.toString());
// "2026-03-29T02:30:00+01:00[Europe/London]" (01:30 doesn't exist)
```](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:r5emt2gkdrkb2yc6y7xndxpe/bafkreicgonzisednk3qegophndqf6fnslwtvbd7gshsgtv6fpi3arh2dsi)
After implementing web streams in multiple runtimes, supporting them for years, talking with other implementers, dealing with issues... I think it's well past time we talked about something better blog.cloudflare.com/a-better-web...
We deserve a better streams API for JavaScript
The Web streams API has become ubiquitous in JavaScript runtimes but was designed for a different era. Here's what a modern streaming API could (should?) look like.
blog.cloudflare.com
Been using this repo to iterate on API ideas for a concurrent compatible store for React. Still exploratory but excited that we’re very close to something that we can start trying out with existing data stores and start an iteration cycle based on what we learn.
Mark Erikson@acemarke.dev · 10mo agoHad a great discussion with @capt.dev about the work he and Justin Walsh are doing prototyping React's "concurrent store" API. Really excited to see the active WIP ideas like this PR: github.com/thejustinwal... hopefully we'll get to try this out with React-Redux soon and see what's feasible!
As an experiment, we (the Firefox team) wanted to try a new way to get feedback on which Interop proposals matter most. So, here's a web app where you can rank the proposals you care about, giving us data we can use when reviewing which ones to champion. interop-rank.jakearchibald.com
Interop Feature Ranking
Rank the web platform features you care most about
interop-rank.jakearchibald.com
React 19.2 is now available! This release includes Activity, useEffectEvent, React Performance Tracks, partial pre-rendering, and more: react.dev/blog/2025/10...
React 19.2 – React
The library for web and native user interfaces
react.dev
i wrote about atproto and why it matters
Open Social — overreacted
The protocol is the API.
overreacted.io
⚛️📝 New on Overreacted: What Does "use client" Do?
What Does "use client" Do? — overreacted
Two worlds, two doors.
overreacted.io
Today we're sharing that View Transitions and Activity are ready to try in the experimental channel, along with docs and updates on other areas we're actively working on: react.dev/blog/2025/04...
React Labs: View Transitions, Activity, and more – React
The library for web and native user interfaces
react.dev
Today brings 84 new features in Safari 18.4! • Declarative Web Push • Screen Wake Lock API for Home Screen Web Apps • Viewport presets in Responsive Design Mode • Ogg Opus & Vorbis • Image Capture API • WebM support in MediaRecorder • `view-transition-name: match-element` webkit.org/blog/16574/w...
WebKit Features in Safari 18.4
Safari 18.4 is here!
webkit.org
🎉 Exciting news! The Unicode MessageFormat 2.0 (MF2) specification is here! 🚀 This marks a huge milestone in our multi-year effort around improving how we localize software and eventually, the web. Check out the announcement: 🔗 blog.unicode.org/2025/03/unic...
The Unicode Blog
Unicode CLDR 47 Release: MessageFormat 2.0 Stable CLDR 47 is now available and has been integrated into version 77 of ICU. The CLDR 47 re...
blog.unicode.org
You can pass sub-classed Promises to React such as in use() with the fields status and value or reason. This allows React synchronously read the value without waiting on a microtask. This is much faster but it also ensures compat when someone needs flushSync(). Microtasks are bad, mkay.
Web development is easy. All you need to do is build a fully asynchronous, distributed system, serving an unknown set of clients over an unreliable network
react@19.0.0-rc1 is out today with a replacement for sibling pre-rendering. Give it a try and maybe we can ship React 19 soon? github.com/facebook/rea...
[React 19] Disabling prerendering siblings of suspended components breaking common pattern · Issue #29898 · facebook/react
Summary I'm creating this issue to continue the discussion that spawned in the already merged PR (#26380) Several community members have raised concerns about this change and it has gained traction...
github.com
This fix for this is so slick: instead of reverting back to the old behavior where Suspense fallbacks have to wait for suspended siblings to render, the new feature commits fallbacks immediately, then schedules a render for the siblings after to "pre-warm" the lazy requests in the tree.
React@react.dev · 2y agoreact@19.0.0-rc1 is out today with a replacement for sibling pre-rendering. Give it a try and maybe we can ship React 19 soon? github.com/facebook/rea...
🎉 After six incredible years at Framer, it’s time for my next step. Today, we’re spinning Framer Motion out as its own independent open-source project, to better serve the whole community. Introducing Motion. For React, and now, for everyone.