Sebastian Markbåge

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.

class RejectedPromise extends Promise { constructor(reason) { super((resolve, reject) => reject(reason)); this.status = 'rejected'; this.reason = reason; } }

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.

New York, New York, New York so good they named it thrice+. New York County is Manhattan. New York City is larger than the county and includes the five boroughs. New York State includes all of them. The city is Manhattan, i.e. New York County. The Tri-State area is the New York metropolitan area.

Long Island City is in Queens which is on Long Island but not out on Long Island.

New York, New York, New York so good they named it thrice+. New York County is Manhattan. New York City is larger than the county and includes the five boroughs. New York State includes all of them. The city is Manhattan, i.e. New York County. The Tri-State area is the New York metropolitan area.

Long Island excludes Queens which on Long Island. Westchester is upstate from New York but not in Upstate New York. Upstate New York includes Connecticut and Vermont.

The new iOS 18.4 Beta is the first on-device build that has working Scroll-Driven Animations on iPhone. It's not on by default there yet. Unfortunately, it feels a little jittery. Like the frame-rate isn't quite right or something it getting rounded to integers. bsky.app/profile/bram...

Filed a bug bugs.webkit.org/show_bug.cgi...

Chrome DevTools is now going to ignore list `node:` by default. github.com/ChromeDevToo... This is great news for using Chrome Inspector to inspect servers (like the Next.js server). If you've added custom rules and moved away from the default. I recommend adding ^node: to your ignore list.

With RSC you usually don't need to inspect the server because the console logs are also available in the client console. However, for advanced use cases it can still be useful to dig into using Chrome Inspector. I much prefer that over using the Terminal. NODE_OPTIONS='--inspect' pnpm next dev

I'm working on built-in profiling of both Client and Server Components in Chrome DevTools Performance tab. Thanks to the new performance.measure() extensions. h/t Andrés Olivares This works in any RSC environment. In fact, this screenshot is running RSC for Parcel. h/t @devongovett.bsky.social

If you use auth with refresh tokens that have automatic reuse detection. I.e. if an auth token is expired, you can request a new one using the refresh token only once. How do YOU on your site deal with the race condition where opening multiple tabs/requests at once logs the user out? Not at all?

Catch the gotcha? This cache entry is specific to only a specific user because it uses the current user to compute its output. It means the current user must be part of the cache key otherwise this cache entry could leak between users. "use cache" handles this automatically for closures.