This week in React

https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> React-Hook-Form 7
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> React-UX-Form
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Dumi
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Figma-To-React
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Recoil 0.2
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Hermes Intl + OTA
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Nextgen buildtools
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Bundless
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Microsite
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Let https://abs.twimg.com/emoji/v2/... draggable="false" alt="➡️" title="Pfeil nach rechts" aria-label="Emoji: Pfeil nach rechts"> Const
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> How to test UI
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> XState Catalogue
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> Vue 3 https://abs.twimg.com/emoji/v2/... draggable="false" alt="❌" title="Kreuzzeichen" aria-label="Emoji: Kreuzzeichen"> IE11
https://abs.twimg.com/emoji/v2/... draggable="false" alt="👉" title="Rückhand Zeigefinger nach rechts" aria-label="Emoji: Rückhand Zeigefinger nach rechts"> DevTools https://abs.twimg.com/emoji/v2/... draggable="false" alt="➡️" title="Pfeil nach rechts" aria-label="Emoji: Pfeil nach rechts"> TS

https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧵" title="Thread" aria-label="Emoji: Thread">https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧵" title="Thread" aria-label="Emoji: Thread">https://abs.twimg.com/emoji/v2/... draggable="false" alt="🧵" title="Thread" aria-label="Emoji: Thread"> Details https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">

React-Hook-Form v7 was released by @bluebill1049

https://react-hook-form.com/migrate-v6-to-v7/

Most">https://react-hook-form.com/migrate-v... exciting thing is probably leveraging TS 4.1 template literal types and being able to type-check the form against field-name typos!

New React-UX-Form library by @zoontek

Also based on a subscription model and per-field validation (like React-Hook-Form), also using an interesting "validation strategy" concept.

Compat with React and React-Native.

https://github.com/swan-io/react-ux-form">https://github.com/swan-io/r...

Discovered UmiJS by @chenchengpro

A React application framework that can output a static SPA.
https://github.com/umijs/umi 

Looks">https://github.com/umijs/umi... quite popular already and has its own ecosystem, including an opinionated doc site generator called Dumi:

https://github.com/umijs/dumi ">https://github.com/umijs/dum...

Figma to React by @tomsoderlund

It can convert a Figma design to:
- React-Native
- React+Styled-JSX

Code output looks quite clean

https://figma-to-react.vercel.app/ ">https://figma-to-react.vercel.app/">...

Recoil 0.2 released by @mcc_abe

Improvements on async selectors, performance and scalability, and various bugfixes.

Future releases will have memory management features like cache eviction policies (LRU). https://recoiljs.org/blog/2021/03/22/0.2.0-released">https://recoiljs.org/blog/2021...

Hermes progress continues!

After Proxies in RN 0.64, @huxpro said Intl support should be added in React-Native 0.65 for Android.

#issuecomment-816126715">https://github.com/facebook/hermes/issues/23 #issuecomment-816126715">https://github.com/facebook/...

About Hermes and OTA:

@mrousavy it seems RN CodePush OTA already works, even with the newly released iOS support! (community feedbacks from @mrousavy)

https://github.com/microsoft/react-native-code-push/issues/1966

And">https://github.com/microsoft... @expo is likely to add Hermes support soon too!

It& #39;s a bit difficult to see how the next-gen build tools are different from one another.

@elliotclydenz did a great job comparing them and explaining the tradeoffs!

It looks like Vite by @youyuxi is the simplest option for a drop-in CRA replacement. https://css-tricks.com/comparing-the-new-generation-of-build-tools/">https://css-tricks.com/comparing...

But there are new nextgen build tool contenders!

Enter Bundless by @__morse

It looks interesting, as it bets fully on esbuild and its plugin ecosystem, even for the production build.

https://github.com/remorses/bundless">https://github.com/remorses/...

Another interesting innovation: Microsite, a static site generator based on Snowpack and Preact, by @n_moore . .

https://github.com/natemoo-re/microsite

Following">https://github.com/natemoo-r... the progressive enhancement pattern:
- Supports "automatic partial hydration"
- Ships minimal JS to the browser

Replacing "let" with "const"

https://charles-stover.medium.com/replacing-let-with-const-86797b790775

Can& #39;t">https://charles-stover.medium.com/replacing... agree more with this article from @CharlesStover

Your code becomes simpler by using an inner function + return.

Alternatives: IIFE or do-expressions (stage-1):
https://github.com/tc39/proposal-do-expressions">https://github.com/tc39/prop...

How to actually test UIs by @winkerVSbecks

Interesting post explaining the tradeoffs of 5 different ways to test UI / components:
- visual
- compositions
- interaction
- accessibility
- user-flows (end-2-end) https://storybook.js.org/blog/how-to-actually-test-uis/">https://storybook.js.org/blog/how-...

Vue 3 drop its initial plan to support IE 11

According to this RFC by @youyuxi , explaining the decision:

https://github.com/vuejs/rfcs/blob/ie11/active-rfcs/0000-vue3-ie11-support.md

It& #39;s">https://github.com/vuejs/rfc... planned to backport important features to Vue 2 for those that need to support IE11

XState Catalogue by @mpocock1

A collection of well-designed state machines for XState.

Includes various patterns from complex forms like wizards) to data-fetching patterns like infinite-scroll

https://xstate-catalogue.com/ ">https://xstate-catalogue.com/">...

Chrome DevTools migrated 150k LOC from Closure Compiler to TypeScript.

@TimvdLippe tells the story behind this migration:

- catch more errors than before, but increased compilation time

- using @ts-nocheck everywhere and removing it one file at a time https://developer.chrome.com/blog/migrating-to-typescript">https://developer.chrome.com/blog/migr...

https://abs.twimg.com/emoji/v2/... draggable="false" alt="🎬" title="Filmklappe" aria-label="Emoji: Filmklappe"> THE END!

Going to turn these threads into emails (when I& #39;ll have more time).
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