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React dev using useEffect:
November 11, 2025 at 10:59 AM
TIL about the JS "Declarations in Conditionals" proposal

This lets you write const/let inside if/while block

Curious, would you use this?
I think I like it, could make code slightly less verbose and still explicit

(TC39 stage 1, will be presented for stage 2 next week)

github.com/tc39/proposa...
November 10, 2025 at 5:01 PM
All React apps
November 10, 2025 at 8:41 AM
👀 React Suspense for CPU-intensive tasks

We've heard about it a long time ago, and the API has recently been refined as a simple "defer" boolean prop.

🚧 Not ready for prime time, but it should be in the next experimental channel release

github.com/facebook/rea...
November 7, 2025 at 9:27 AM
This Week In React 257 - 🤝 Armand & I

🍿 Read: thisweekinreact.com/newsletter/257

⚛️
- Navigation API
- Partial Pre-Rendering
- Directives
- Micro-frontends
- Storybook
- Immer
📱
- Godot
- Uniwind
- Critical DevServer vulnerability 🚨
- GPU
- iOS filters
- Windows
- Hermes
November 5, 2025 at 6:59 PM
The React core team when they see devs using useEffect
November 5, 2025 at 11:29 AM
👀 Navigation API will be available in all browsers soon 🎉

Completely redefines the APIs used to build client-side routers / SPAs

🫤 History API: popState, link click.preventDefault() ...

✅ Navigation API: clean, centralized way to intercept navigation events 👌
November 5, 2025 at 9:35 AM
The Navigation API is also in Firefox 146 nightly

This is going to be available everywhere soon 🎉
November 5, 2025 at 9:17 AM
👀 Remix published their event/interaction package

Nicely composable API, not coupled to any framework

I like its built-in/custom interaction system, which could help remove event-related state/complexity from your UI components

Wonder if this makes sense to use with React?
November 5, 2025 at 8:36 AM
Firefox just unflagged support for CSS @ scope 🎉

Soon available in all browsers
November 4, 2025 at 6:08 PM
Chrome 143 beta is upgrading Intl API / ICU

I was wondering: isn't this kind of change likely to produce React hydration mismatches?

I mean, SSR and client-side React must render the exact same formatted values 🤷‍♂️

Node/Browser ICU may not be in sync
November 4, 2025 at 6:04 PM
Until they make it built-in, here's a TS plugin

github.com/lazarv/types...
November 4, 2025 at 10:12 AM
Agree, I misread this a bit as if you said "they are not strings"

Still, they are more than strings, but they still inherit the drawbacks of strings, including being more difficult to type

If we limit ourselves to a simple finite list of directives, I guess TS could allow typechecking them?
November 4, 2025 at 8:46 AM
Directives are String literals according to the spec

They are just a special kind of string literals

(I'm not against the usage of directives, just want to clarify my disagreement)
November 4, 2025 at 8:23 AM
That's also why I disagree when you say "they are not just strings"

Actually, they are "StringLiteral" according to the spec, but they are a specific type of string literal

It's a bit like saying JSON strings are not strings. They are, but they have different utility than any other kind of string
November 4, 2025 at 8:16 AM
Even if there was no "directive" attribute and it was just "type: string" you could easily infer from the AST structure/parent that it's a literal that is not used or assigned

body => ExpressionStatement => String literal is a top-level directive
November 4, 2025 at 8:12 AM
This Week In React 256 - 🤝 @filipkaminski.com @piaskowyk.bsky.social

🍿 Read/subscribe: thisweekinreact.com/newsletter/256

⚛️
- Next.js / Cache Components
- Directives drama
- TanStack
- Storybook
- Waku
- shadcn
- Rari
📱
- React Navigation
- Expo / EAS
- Gesture Handlers
- Screens
- Nitro

Enjoy!
October 29, 2025 at 5:20 PM
October 28, 2025 at 11:07 AM
This Week In React 255:
⚛️
- Next.js
- RSC
- shadcn Field
- TanStack
- 3D / XR
- Fumadocs
📱
- Solito
- iOS header items
- Bottom Tabs
- MMKV
- ImGui

🍿 Read/subscribe: thisweekinreact.com/newsletter/255
October 22, 2025 at 6:15 PM
October 21, 2025 at 9:27 AM
If you are curious, here's what a Remix v3 component looks like
October 15, 2025 at 5:01 PM
This Week In React 254 - 🤝 @kacperkapusciak.bsky.social @piaskowyk.bsky.social

🍿 Read/subscribe: thisweekinreact.com/newsletter/254

⚛️
- Next.js 16 beta
- Remix 3 preview
- Compiler
- Async React
- TanStack
- Cloudflare
- Hook Form
📱
- VirtualView
- DevTools
- Harness
- Audio
- Screens
- Radon
October 15, 2025 at 4:45 PM
React vs Remix - Do we really want to move back to imperative re-renders?

As far as I remember, we already tried that

See, for example, this BackboneJS counter
October 14, 2025 at 10:30 AM
TIL that HTML has an <output> tag for years 😅

Useful for semantic and accessibility

Here, the example is a simple addition

But it's also useful for async dynamic results computed on the server using modern frontend frameworks like React
October 14, 2025 at 9:31 AM
This Week In React 253 - Special React Conf

🍿 Read/subscribe: thisweekinreact.com/newsletter/253

⚛️
- Compiler 1.0
- React Foundation
-
-
- useEffectEvent
-
📱
- RN 0.82
- Hermes V1
- DOM APIs
- Vega OS
- Keyboard Controller
- IAP
- Skia
October 8, 2025 at 6:22 PM