Tag Archives: javascript

create-es-react-app – A create-react-app like template using only es-modules (no build step).

create-es-react-app is a create-react-app like template demonstrating how far you can get creating progressive web apps (using react) with no build step. It takes advantage of static and dynamic imports which enables you to break up your app into small reusable ES modules that are compiled for you by the browser at run time. TIL: […]

React Hooks: When to useMemo and useCallback

Insightful post by Kent C. Dodds on the costs and benefits of React’s useMemo and useCallback. We hear a lot that you should use React.useCallback to improve performance and that “inline functions can be problematic for performance,” so how could it ever be better to not useCallback? Just take a step back from React and […]

The Economics of Open Source // Introducing Entropic, a federated package registry

At JSConf EU 2019, CJ Silverio – former CTO at NPM Inc – gave this talk on why a VC-funded private package registry (read: the one ran by NPM Inc) holds many dangers. The JS package commons is in the hands of a for-profit entity. We trust NPM Inc with our shared code, but we […]

useDimensions – a React Hook to measure DOM nodes

import React from 'react' import useDimensions from 'react-use-dimensions' const MeasuredNode = () => { const [ref, { x, y, width, height }] = useDimensions(); return ( <p ref={ref}> I am a paragraph at ({x}px, {y}px) position with a width of {width}px and height of {height}px </p> ); }; Handy. Uses window.resize+window.scroll internally, yet I’m quite […]

Optimizing JavaScript packages for tree shaking

Geoffrey Dhuyvetters from madewithlove on how authors of (open source) JavaScript packages can optimize their builds for tree shaking: How do we create a package that exposes both CommonJS & ES modules while making sure we don’t break cross-platform support? Publishing 2 separate packages is an option (e.g. lodash/lodash-es). But there is a nicer, more […]

Making Future Interfaces: ES Modules

Once again a highly entertaining video by Heydon Pickering. This time he’s tackling ES Modules: how and where (e.g. in which browsers) can you use them? 💁‍♂️ Even if you already know how to ship ES2015 JavaScript to browsers the video still is worth your time, as it’s very fun to watch!

Tiny Mirror – Mirror your Webcam into the Favicon

Fun little experiment that mirrors your webcam into your favicon. Tiny Mirror → 🔥 The aforementioned favico.js (from 2013!) also comes with a “Webcam video to icon” option. Next to mirroring the webcam into your favicon it also supports badges, videos, etc. 🍰 Looking to display (pie)charts in your favicon? Piecon can do that for […]