This Week In React #95: onRecoverableError, Next.js, Remix, ReactNode, Fabric, Flipper, Expo, React-Runner, State Of JS...
This Week In React #95: onRecoverableError, Next.js, Remix, ReactNode, Fabric, Flipper, Expo, React-Runner, State Of JS...
React
React 18: onRecoverableError
A React 18 RC1 should be released this week, announced by Andrew Clark: "Small update on React 18: we're planning another RC for next week that includes improvements to error reporting"
It ships with a new API onRecoverableError. The idea is to be able to log/report (via reportError) the "recoverable errors" that might happen in React, notably during the hydration process when there are some mismatches between SSR and CSR.
Next.js 12.1
Nice release including one of the most highly anticipated feature: on-demand Incremental Static Regeneration (ISR). A new API unstable_revalidate("/static-page-url") should significantly help for CMS integration: as you can now get an immediate update on CMS publish.
On SWC side: 6 new Babel plugins ported to Rust (including Styled-Components and Relay), SWC minify in release-candidate and a better zero-config integration with Jest
There's also some notable progress on React 18 and Server Components support, but it's still in alpha.
See also the introduction video from Lee or the on-demand ISR demo from Delba.
Remix 1.2
An interesting release on the deployment part: new serverBuildTarget option to configure the build (directory, module format), possibility to build the server in a single output file, and a new experimental adapter to deploy on Deno.
The React.ReactNode type is a black hole
Widely known problem for a long time, the TypeScript type for ReactNode is too loose and does not permit to catch some errors at compile time. Kevin suggests to create a StrictReactNode type and provides an ESLint rule to forbid the usage of ReactNode. Similar article.
Extras:
📜 Putting test files in the pages folder in a Next.js app: useful Next.js trick if you want to co-locate stories and tests alongside Next.js pages: the
pageExtensionsconfig📜 Deep dive into React keys bugs: explains various problems related to the
keyprops and suggest solutions📦 React-Runner: new modern alternative to React-Live to provide live editor + preview, based on Sucrase instead of Bublé. This is promising and could eventually be adopted by both the new React docs and Docusaurus.
📦 Tunnel-Rat: new Poimandres lib based on Zustand, to create a "React tunnel" and teleport JSX from one tree to another. See also React-Teleporter.
🔗 Nextjs-blog-theme: Next.js + Tailwind blog template provided by Netlify/Bejamas
💬 Mark Erikson: "when/why should I use Context, Hooks, Thunks, Sagas, React Query, RTK Query?"
💸 Sponsors
React Bricks: CMS with visual editing for Next.js, Gatsby and Remix, based on React components
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Learn it in about 2 hours with the Step-by-step tutorial or the full Documentation.
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React-Native
Introducing Fabric to react-native-screens
With React-Native 0.68, we can easily activate the new Fabric renderer! But it will only work if all your libs are compatible.
Software Mansion announces its commitment to making its libs compatible with Fabric (starting with React-Native-Screens).
They encourage us to do the same and give us some leads (process and PRs). The idea: create libs that work as well with both the new and the old architecture at the same time, to allow an incremental migration, but without duplicating too much code.
This is very exciting, and the community provides some feedback:
Note that React-Navigation already works under Fabric with react-native-screens!
Flipper is coming to your web and Node.js apps
Flipper is initially a desktop DevTool for React-Native, permitting you to inspect logs, network requests... Andrey introduces js-flipper: a package that permits to integrate Flipper with web or Node.js apps (React example). He shares various use-cases at Meta: mobile, web, Node.js, Desktop, Oculus Quest... there are also app-specific business use-cases such as a plugin providing a "log as user X" feature.
Flipper seems to be an ideal platform to build a universal DevTool, provided the ecosystem follows, so Andrey invites us all to create plugins.
Extras:
📜 Security of React Native libraries: the bad, the worse and the ugly: a fairly advanced security audit that criticizes a lot of crypto libs in React-Native. The company suggest to use Themis, a cross-platform crypto library (React-Native API in beta) that encourages crypto good practices without being a crypto expert.
📜 Expo 101: Building mobile apps in weeks, not years: nice overview of the whole modern Expo ecosystem based on AES. They provide a tool for each stage of our mobile projects.
📜 Better Credentials Management with Expo Application Services
📦 vision-camera-ocr: real-time OCR frame-processor!
📦 react-native-safe-area-context v4 RC: Fabric support, backward compatible. Looking for early adopter feedback
🎨 Demo graph React-Native-Skia: more performant than SVG
Partners
Start React Native: learn everything about gestures and animations with William Candillon
React-Native Weekly: stay up-to-date React-Native core updates
TypeScript Weekly: the best TypeScript links every week, right in your inbox.
ES.next News: learn about the latest in JavaScript and cross-platform tools
Tailwind Weekly: all things Tailwind CSS, new issue every Saturday
G2i: pre-vetted remote React & React-Native developers you can trust on contract or full-time basis
Infinite Red: US React-Native experts making your idea a reality
Software Mansion: the co-creators of React Native and the technological core of many tech companies
Other
State Of JS 2021
Unsurprisingly, React remains very popular this year, but it is surpassed by Svelte and Solid in terms of satisfaction. Next.js and Remix both at 91% satisfaction. Read in particular Swyx's conclusion. A livestream is taking place today.
Remember this survey is not without bias, but it remains interesting to explore trends. Sacha Grief is of goodwill to improve and addresses the criticisms on Dev.
Extras:
Rebuilding Babel: The Tokenizer: great interactive article, perfect to learn what is a tokenizer
Express 5.0: first beta after a long time 😅 in the meantime it's modern contender Fastify tops the State of JS and released v4.0.0-alpha.1
GitHub Actions:
concurrency.cancel-in-progress: useful to optimize your CINode.js:
AbortSignal.timeout(): new APInew.target: TIL, permits to know if a function was called withnew, faster thaninstanceofCSS Container Queries: enabled by default in WebKit
New Google Cloud Functions: 60min execution time!
Cross-Browser support with Cross-Origin isolation: explains why StackBlitz WebContainers only work in Chromium
Create your Chrome Extension using Flutter web: 🤔 this use-case is interesting: an extension doesn't need SEO
TypeScript - Implement Rust-style Result: reminds the Either FP type
Netlify Graph: new Netlify service after acquiring OneGraph: a unified GraphQL API targeting lots of other third-party APIs
Node.js Trademarks Transferred to OpenJS Foundation: that would be nice if Oracle also transferred its JavaScript trademarks 😅
"TIL you can write overloads for arrow functions in TypeScript"
You Can throw() Anything In JavaScript - And Other async/await Considerations
Rome: "A sneak peak of our formatter: being able to format partial broken code!"
Measuring user flow performance with Lighthouse and WebdriverIO
