We’re pretty close to having an initial Rust port of React Compiler. My approach was to iterate on the plan document (write it manually, have the agent expand, edit, repeat). Then try to run it, see what goes wrong, revert back to the plan, tweak the plan, repeat.

useActionState is a new hook for forms, async reducers, and more. It now has great new documentation: react.dev/reference/re... Thank you to @ricky.fm for writing. Thank you to @aurorascharff.no, @danabra.mov, @samselikoff.com, @stephanjnoel.bsky.social, @brenelz.com, and @yadiel.dev for reviewing.

Does this diagram help? It uses the React Performance Tracks to explain what React is doing, and what you'll see when you use the tracks: github.com/reactjs/reac...

Adding more information to React error pages github.com/reactjs/reac...

useEffectEvent makes handling events in Effects much easier and saves unnecessary unmounting and remounting of listeners. It now has awesome new docs: react.dev/reference/re... Thank you to @ricky.fm the updates, and @danabra.mov and @stephanjnoel.bsky.social for reviewing

Rewrote the useActionState docs, does this make sense? github.com/reactjs/reac...

Take me down to the Parallax city where the far moves slow and the near moves quickly

@ricky.fm Thank you for updating react.dev/reference/re... page. Also thanks to @danabra.mov, @aurorascharff.no @stephanjnoel.bsky.social, @brenelz.com for adding feedback

I rewrote the useEffectEvent docs, feedback welcome: github.com/reactjs/reac...

thanks @danabra.mov! github.com/reactjs/reac...

The future came, and it's not annoying

www.columkelly.com/blog/use-opt... Updated the todo examples and some of the writing after getting feedback from @ricky.fm To be fair, Ricky's version of the final example is very clean, (although it took me a while to grasp). useOptimistic might save you after all.

My Async React talk from React Conf is up! www.youtube.com/watch?v=B_2E...

Please update (again) immediately.

Researchers have found two new vulnerabilities in React Server Components while attempting to exploit the patches last week. These are new issues, separate from the critical CVE last week. The patch for React2Shell remains effective for the Remote Code Execution exploit.

I’ve programmed since I was 11 and got a minor in CS, but I wanted to be a math teacher. I was offered a 35k math teacher position replacing a retiring teacher making 70k, and was told “this is how it works you have to take it”. I said no, two weeks later I started at a software engineer for 70k.

any historian able to tell me what stage of democracy it is in when the leader is saying “off with their heads”

Going back through @ricky.fm's Async React as I prep an internal talk, and this part is insanely good, felt like it deserved a reshare🔥 youtu.be/p9OcztRyDl0?...

⚠️ In 90 Minutes Learn how Suspense, transitions, and optimistic updates work in React with core team member @ricky.fm. Details:

People give `useEffect` a bad rap, but it isn't usually the source of the problem. The real problem is too many `useState`s. Devs fail to see how their data is connected and model it too discretely. As those connections appear, it is easier to synchronize than refactor the model. 1/

📣 Just Scheduled Learn how Suspense, transitions, and optimistic updates work in React with core team member @ricky.fm. Details:

can i ai nerd snipe anyone into doing this github.com/reactjs/reac...

The React core team when they see devs using useEffect

aargh someone kill me. literally THE WHOLE POINT of directives is that they’re not just strings! they’re syntactically attached to the scope (function or module) in a way that’s reflected in AST. and both RSC and Next.js ones act at module boundary which is kinda gross for decorators or API calls

Anyone remember asm.js? It allowed you to add "use asm" directives to functions and runtimes would compile them to binary. It was ahead of its time, but was criticized as forking JavaScript syntax and creating vendor lock in for Firefox. It became WebAssembly.

This is very cool! For React devs, the closest analog is the new Activity API. There are pros/cons of each - for example with Activity you kinda have to do some ceremony to pre-render on hover, and this fork() API makes that a bit easier, but I think Activity covers more use cases.

Here's the code for my Async React demo: github.com/rickhanlonii...

please stop dm’ing me that it’s just backbone.js all over again

i think the @react.dev Compiler team could include more of this type of messaging. i'm being a bit inflammatory here (and Haskell may not the best analogy), but the principle of "pure things are safe to move around" is fundamentally simple and has been known for decades. teach it to new generation!

I might do a deep dive later on. I didn’t go into the sync example much, but if you do, you find yourself having to use a bunch of refs and effects just to get a semi good experience. There are no refs or effects with async react features.

i thought @ricky.fm talk was very good. i hope they’ll glue it up together from two days into a cohesive video. slightly sad about the last example breaking (a one-line mistake) but such is the nature of live demos. overall i think it’s a great conclusion to last ten years of work from the team. 💜

Part 2 is on the schedule, I’m just going to start the demo over and finish the talk from there

react <Activity> be like

Part 2 will be at React Conf tomorrow

My talk is just suspended, I’ll finish it later

This explains why useEffectEvent took so long to ship. We tried a lot of alternatives, but they all hit this problem. We decided to ship it with all the constraints, because it’s useful even when constrained, but I’m still hoping for a general solution.

This is React Fiber:

<Activity> - The most exciting React feature just came out! Hide a React subtree and unmount its Effects while preserving its state, and keep rendering it with lower priority. Unlocks very exciting pre-rendering patterns along the way! More Activity modes are coming

Anyone remember React Fiber?

wait what

banger

cooking

[at my second rodeo] listen up you ignorant sack of shit

We're live: twitch.tv/ryansolid

For the first time in the 4 years I've been doing Friday streams, I will be having a @react.dev Core Team member as a guest. I'm excited to welcome @ricky.fm on to talk all things React. Past, present, future. www.youtube.com/live/3vw6EAm...

The snowflakes at Youngstown WYTV are not playing Jimmy Kimmel Live

I have finished a journey cassidoo.co/post/two-tho...