Tag Archives: javascript

useUnmountSignal() — A React Hook to cancel promises when a component is unmounted

A React Hook that wraps around the almighty AbortController. It will automatically call abort() on the created AbortSignal instance when the component unmounts. import useUnmountSignal from 'use-unmount-signal'; function Example() { const unmountSignal = useUnmountSignal(); return ( <button onClick={() => fetch('https://ping.example.com', { signal: unmountSignal }) }> Ping </button> ); } Installation per NPM: npm i use-unmount-signal …

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Execute ES Modules on the CLI

Jonathan Neal shared this little snippet on Twitter: Execute JavaScript modules like: bash ./command.js 1. Add the funky header.2. Optional: Omit the extension to not write `.js`.3. Optional: `chmod +x command` to not write `bash `.https://t.co/rhlPg2XPRJ pic.twitter.com/nbAvTFtt0w — Jonathan Neal (@jon_neal) July 25, 2021 Here’s the code: “:” //#;exec /usr/bin/env node –input-type=module – “$@” < …

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JavaScript: Hostnames as self-executing fetches

In a conversation between Mathias Bynens and Ingvar Stepanyan, an idea popped up: what if a hostname — such as www.bram.us — would be valid JavaScript? Using a JavaScript Proxy, that’s perfect possible. My favourite is hostnames being valid (and working!) JavaScript. — Ingvar Stepanyan (@RReverser) June 12, 2019 Building further upon that is proxy-www, …

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petite-vue — A 5.5kb subset of Vue optimized for Progressive Enhancement

 Inspired by Alpine.js, Evan You — author of Vue — created petite-vue petite-vue is an alternative distribution of Vue optimized for progressive enhancement. It provides the same template syntax and reactivity mental model with standard Vue. However, it is specifically optimized for “sprinkling” small amount of interactions on an existing HTML page rendered by a …

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Convert a String representation of a JavaScript Object to an Object

 For my little helper tool that converts a JavaScript Style Object into Custom Properties I had to convert the contents of the textarea — which is a String — to an actual Object. Lacking a native Object.parse() — something like JSON.parse() or Array.from() but for objects — I created my own function: const createObjectFromString = …

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Demystifying styled-components

Josh W. Comeau lays out the details how styled-components works internally. For so many React devs, styled-components seems kinda magical. It isn’t at all clear how it uses traditional CSS features under-the-hood, and that lack of clarity can cause real problems when things go awry. In this post, we’ll learn exactly how styled-components works by …

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Rethinking JavaScript Infrastructure

Christoph Nakazawa, former Engineering Management at Facebook and now Front End Engineer at Stripe, is writing a series about JavaScript infrastructure. In this second part of this still in progress series he digs into eliminating the ongoing need for installing dependencies from the development iteration cycle. I provide recommendations that I personally implemented and have …

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