Max
@maxwellcohen.bsky.social
Everything will be great!
Husband, father of 2, professional software engineer during the work week, and trying to be a helpful developer by night.
I will check your site's robots.txt and mobile experience.
Modern Web, Vue, and React Compiler Fan!
Husband, father of 2, professional software engineer during the work week, and trying to be a helpful developer by night.
I will check your site's robots.txt and mobile experience.
Modern Web, Vue, and React Compiler Fan!
Is atproto too powerful?
microblogging on atproto has been achieved internally
September 15, 2026 at 11:16 PM
Is atproto too powerful?
Reposted by Max
microblogging on atproto has been achieved internally
September 15, 2026 at 11:09 PM
microblogging on atproto has been achieved internally
Awesome to see more info on third parties coming to Crux Data!
We just launched experimental ad metrics in the Chrome User Experience Report (CrUX):
- Ad Count
- Ad Density
- Ad Weight: Network
- Ad Weight: CPU
These metrics are a set of ad-related measurements that provide transparency into sites' ad experiences.
developer.chrome.com/blog/crux-ad...
1/8 🧵
- Ad Count
- Ad Density
- Ad Weight: Network
- Ad Weight: CPU
These metrics are a set of ad-related measurements that provide transparency into sites' ad experiences.
developer.chrome.com/blog/crux-ad...
1/8 🧵
New ad metrics in Chrome User Experience Report | Blog | Chrome for Developers
Learn about the new ad metrics now available in the Chrome User Experience Report (CrUX)
developer.chrome.com
September 15, 2026 at 8:19 PM
Awesome to see more info on third parties coming to Crux Data!
Reposted by Max
🙋♂️ ever wanted to build something without needing to configure a db, auth, file storage or a cms?
it turns out you already have all four if you have a bluesky account
👉 airspace is a typed client for it
it turns out you already have all four if you have a bluesky account
👉 airspace is a typed client for it
airspace
The database you already have.
getair.space
September 14, 2026 at 4:08 PM
🙋♂️ ever wanted to build something without needing to configure a db, auth, file storage or a cms?
it turns out you already have all four if you have a bluesky account
👉 airspace is a typed client for it
it turns out you already have all four if you have a bluesky account
👉 airspace is a typed client for it
With the release of React 19.3, I hope it is a start/expansion of some very exciting trends with React:
September 14, 2026 at 2:59 AM
With the release of React 19.3, I hope it is a start/expansion of some very exciting trends with React:
September 14, 2026 at 12:00 AM
Great article!
I don't want to think about how many hours I spent fighting derived state in Angular/VueJS/React, and SolidJS has the defaults I wanted all along.
What are the little things you love about the framework/library of choice?
I don't want to think about how many hours I spent fighting derived state in Angular/VueJS/React, and SolidJS has the defaults I wanted all along.
What are the little things you love about the framework/library of choice?
![Screenshot from the article
Derived State You Can Override
Having writable derived state is easy in Solid. All you do is pass in a function to a primitive like createSignal. This gives you a local override of props.name in this example, but when props.name changes from above it will reset to that value.
import { createSignal } from "solid-js";
function Example(props) {
const [name, setName] = createSignal(() => props.name);
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:yklpfrtxl3nmm66hzjilop2n/bafkreidrzrwlbbvm33nszs5666yyxrq2347paliheqllxbvvnwdfpfnt6q)
September 11, 2026 at 2:51 PM
Great article!
I don't want to think about how many hours I spent fighting derived state in Angular/VueJS/React, and SolidJS has the defaults I wanted all along.
What are the little things you love about the framework/library of choice?
I don't want to think about how many hours I spent fighting derived state in Angular/VueJS/React, and SolidJS has the defaults I wanted all along.
What are the little things you love about the framework/library of choice?
Reposted by Max
understated but both of these are kinda huge. ViewTransition is the first ever (!) first-class animation API in React. (it's powered by the browser API but is composable in a very Reacty way.)
and Fragment refs solve "merge refs" soup. you can now have natural apis like <IntersectionObserver> etc
and Fragment refs solve "merge refs" soup. you can now have natural apis like <IntersectionObserver> etc
React 19.3 is now available!
This release makes View Transitions and Fragment Refs stable, and adds browser(), Trusted Types support, and Context in Server Components.
react.dev/blog/2026/09...
This release makes View Transitions and Fragment Refs stable, and adds browser(), Trusted Types support, and Context in Server Components.
react.dev/blog/2026/09...
React 19.3 – React
The library for web and native user interfaces
react.dev
September 10, 2026 at 11:58 PM
understated but both of these are kinda huge. ViewTransition is the first ever (!) first-class animation API in React. (it's powered by the browser API but is composable in a very Reacty way.)
and Fragment refs solve "merge refs" soup. you can now have natural apis like <IntersectionObserver> etc
and Fragment refs solve "merge refs" soup. you can now have natural apis like <IntersectionObserver> etc
And they say CSS is easy
When and how CSS custom property values are calculated might not be what you expect, and it has a big impact on your styles…
September 10, 2026 at 1:30 PM
And they say CSS is easy
::user-valid +html form validations + "use server" + useActionState (or equivalent) = super easy forms that work with or without JS and have client-side validation
youtube.com/shorts/3hVff...
youtube.com/shorts/3hVff...
:invalid sorta sucks... but there's an alternative now
YouTube video by Kevin Powell
youtube.com
September 10, 2026 at 1:11 PM
::user-valid +html form validations + "use server" + useActionState (or equivalent) = super easy forms that work with or without JS and have client-side validation
youtube.com/shorts/3hVff...
youtube.com/shorts/3hVff...
React 19.3 changelog pr
lots of good stuff coming `browser()` api, `` and framgent refs
github.com/react/react/...
lots of good stuff coming `browser()` api, `
github.com/react/react/...
Add React 19.3.0 changelog entry by mattcarrollcode · Pull Request #37554 · react/react
Adds the 19.3.0 changelog entry, covering everything that has landed on main since v19.2.0.
github.com
September 9, 2026 at 5:25 PM
React 19.3 changelog pr
lots of good stuff coming `browser()` api, `` and framgent refs
github.com/react/react/...
lots of good stuff coming `browser()` api, `
github.com/react/react/...
React DevTools MCP was just released
It is one of the first ESM-only libraries coming from React!
npmx.dev/package/reac...
It is one of the first ESM-only libraries coming from React!
npmx.dev/package/reac...
react-devtools-cdt-mcp - npmx
Browser library that registers React inspection and profiling tools with chrome-devtools-mcp
npmx.dev
September 9, 2026 at 4:26 PM
React DevTools MCP was just released
It is one of the first ESM-only libraries coming from React!
npmx.dev/package/reac...
It is one of the first ESM-only libraries coming from React!
npmx.dev/package/reac...
Just had my twice-yearly rewatch of @jakearchibald.com great talk on the event loop. I have to ask: are there any updates on the soda water conspiracy?
youtu.be/cCOL7MC4Pl0?...
youtu.be/cCOL7MC4Pl0?...
Jake Archibald on the web browser event loop, setTimeout, micro tasks, requestAnimationFrame, ...
YouTube video by JSConf
youtu.be
September 9, 2026 at 3:59 PM
Just had my twice-yearly rewatch of @jakearchibald.com great talk on the event loop. I have to ask: are there any updates on the soda water conspiracy?
youtu.be/cCOL7MC4Pl0?...
youtu.be/cCOL7MC4Pl0?...
Looking at the loading experience of these two apps shows how SolidJS and React take radically different approaches to performance, both of which can deliver fast-feeling apps.
September 9, 2026 at 2:06 PM
Looking at the loading experience of these two apps shows how SolidJS and React take radically different approaches to performance, both of which can deliver fast-feeling apps.
Reposted by Max
✨ Neat CSS trick ✨
We can use `width: fit-content` to have a container element shrink to fit its element's width. This is useful for cards!
But if that card has any text content, that text will blow out the width of the card, since it won't automatically linewrap.
So we wind up with this issue:
We can use `width: fit-content` to have a container element shrink to fit its element's width. This is useful for cards!
But if that card has any text content, that text will blow out the width of the card, since it won't automatically linewrap.
So we wind up with this issue:
September 5, 2026 at 8:29 PM
✨ Neat CSS trick ✨
We can use `width: fit-content` to have a container element shrink to fit its element's width. This is useful for cards!
But if that card has any text content, that text will blow out the width of the card, since it won't automatically linewrap.
So we wind up with this issue:
We can use `width: fit-content` to have a container element shrink to fit its element's width. This is useful for cards!
But if that card has any text content, that text will blow out the width of the card, since it won't automatically linewrap.
So we wind up with this issue:
Reposted by Max
Preact 11 has been long in the making and I'm really proud of what came out the other end.
It has quite some history as we first started working on a backing-node (fiber-like) structure for Preact but reversed.
It has quite some history as we first started working on a backing-node (fiber-like) structure for Preact but reversed.
September 5, 2026 at 11:05 AM
Preact 11 has been long in the making and I'm really proud of what came out the other end.
It has quite some history as we first started working on a backing-node (fiber-like) structure for Preact but reversed.
It has quite some history as we first started working on a backing-node (fiber-like) structure for Preact but reversed.
Reposted by Max
We went further because the bundle-size improvements turned out so well, we added support for use, automatic ref forwarding, ... and now recently we got a PR for adding DPU support which works GREAT!
github.com/preactjs/pre...
Thank you to everyone, yall are awesome
github.com/preactjs/pre...
Thank you to everyone, yall are awesome
feat: template-for based streaming by MaxwellCohen · Pull Request #474 · preactjs/preact-render-to-string
Update the template streaming markers to enable <template for > streaming with a MutationObserver-based polyfill.
This is a slightly optimized approach for template-for-based streaming compar...
github.com
September 5, 2026 at 11:05 AM
We went further because the bundle-size improvements turned out so well, we added support for use, automatic ref forwarding, ... and now recently we got a PR for adding DPU support which works GREAT!
github.com/preactjs/pre...
Thank you to everyone, yall are awesome
github.com/preactjs/pre...
Thank you to everyone, yall are awesome
@jovidecroock.com just merged a pr to @preactjs.com to solve one of my biggest pain points with `use` and ``
When Suspense rerenders, the previous state is lost, making it much harder to use promises for data loading.
github.com/preactjs/pre...
When Suspense rerenders, the previous state is lost, making it much harder to use promises for data loading.
github.com/preactjs/pre...
Preserve hook state when Suspense re-suspends by JoviDeCroock · Pull Request #5239 · preactjs/preact
Preserves committed hook state when a Suspense boundary re-suspends while still resetting hooks for an initial suspended mount. Effects are cleaned up and re-run when content is revealed again, wit...
github.com
September 4, 2026 at 7:07 PM
@jovidecroock.com just merged a pr to @preactjs.com to solve one of my biggest pain points with `use` and ``
When Suspense rerenders, the previous state is lost, making it much harder to use promises for data loading.
github.com/preactjs/pre...
When Suspense rerenders, the previous state is lost, making it much harder to use promises for data loading.
github.com/preactjs/pre...
support `` out-of-order streaming replacment for interop 2027 github.com/web-platform...
`<template for >` out of order template replacment · Issue #1366 · web-platform-tests/interop
Description The <template for="…"> HTML element replaces the content at a named range or insertion point, marked by the processing instructions <?start name="…"> and <?end> or <?marker name="…">. Y...
github.com
September 4, 2026 at 4:50 PM
support `` out-of-order streaming replacment for interop 2027 github.com/web-platform...
Newly unflagged in React Canary and most likely coming to React 19.3: warnings about misusing promise status in `use()` that link to a section of the React docs I helped write.
react.dev/warnings/con...
react.dev/warnings/con...
September 4, 2026 at 2:58 AM
Newly unflagged in React Canary and most likely coming to React 19.3: warnings about misusing promise status in `use()` that link to a section of the React docs I helped write.
react.dev/warnings/con...
react.dev/warnings/con...
The `` replacement is magical 🤯. We can have one HTML page that provides 2 different experiences based on browser support.
Try it out at: fast-page-ten.vercel.app/dpu/two-page...
Try it out at: fast-page-ten.vercel.app/dpu/two-page...
September 4, 2026 at 12:50 AM
The `` replacement is magical 🤯. We can have one HTML page that provides 2 different experiences based on browser support.
Try it out at: fast-page-ten.vercel.app/dpu/two-page...
Try it out at: fast-page-ten.vercel.app/dpu/two-page...
Amazing
TS Go port promised only a 10x speed-up, not 20x
TS Go port promised only a 10x speed-up, not 20x
I'm declaring TypeScript 7 for Ember: ready
At work, on the 3 million line monolithic package, I'm seeing
~ 4m40s -> 12s
a ✨ 23x ✨ speed boost
At work, on the 3 million line monolithic package, I'm seeing
~ 4m40s -> 12s
a ✨ 23x ✨ speed boost
September 3, 2026 at 8:20 PM
Amazing
TS Go port promised only a 10x speed-up, not 20x
TS Go port promised only a 10x speed-up, not 20x
I can now confirm that custom selects work without hydration warnings in React Canary and should be coming to React 19.3!
September 3, 2026 at 12:53 PM
I can now confirm that custom selects work without hydration warnings in React Canary and should be coming to React 19.3!