A rather geeky/technical weblog, est. 2001, by Bramus
Saad Quadri created a handy website that lists all ECMAScript Proposals. On one single page you can get a quick glimpse of all proposals and the current stage they are in. Great to see that the various stages of the TC39 Development Process themselves —something I always mention in my ever-evolving talk on ESNext— get …
@scroll-timeline (Part 4)
🚨 UPDATE: The Scroll-Linked Animations Specification and its proposed syntax have undergone a major rewrite. This post details an older version of the syntax and has not been updated to reflect these changes. Do note that the concept of a Scroll-Linked Animation still stands, it’s only the syntax that has changed since writing this. Please …
Continue reading “The Future of CSS: Scroll-Linked Animations with @scroll-timeline (Part 4)“
In this episode of HTTP 203 Jake and Surma go over the code that’s needed to use a Joy-Con (a Nintendo Switch Controller) on the web, which they also use for their own slide decks. As mentioned it’s not possible to get the orientation of the Joy-Con via (the current version of) the Gamepad API. …
Continue reading “Yes, we use a Joy-Con to change slides. Here’s how… | HTTP 203”
A Low Profile Component Framework – Stable, minimal, easy to audit, zero-dependencies and build-tool-free. Basic component definition is really simple: import Tonic from "https://cdn.skypack.dev/@optoolco/tonic" class MyGreeting extends Tonic { render () { return this.html`<div>Hello, ${this.props.name ?? 'Stranger'}.</div>` } } Tonic.add(MyGreeting); Tonic will automatically convert the CamelCased class name to the proper custom element name. <my-greeting></my-greeting> …
Continue reading “Tonic — A thin wrapper around Web Components”
Dave Rupert created a little lovely Houdini Paint Worklet that allows you set a background color with an alpha on elements. The Worklet’s code is as simple as this: registerPaint(‘alpha’, class { static get inputProperties() { return [‘–bg-alpha’, ‘–bg-color’] } paint(ctx, size, props) { ctx.globalAlpha = props.get(‘–bg-alpha’); ctx.fillStyle = props.get(‘–bg-color’); ctx.fillRect(0, 0, size.width, size.height); } …
Elijah Manor digs into Date’s toLocaleDateString() and toLocaleTimeString() methods to format Dates and Times in JavaScript, with respect to a passed locale. const date = new Date(); console.log(date.toLocaleDateString(‘en-US’)); // 7/19/2020 const dateOptions = { weekday: ‘long’, year: ‘numeric’, month: ‘long’, day: ‘numeric’, }; console.log(date.toLocaleDateString(‘en-US’, dateOptions)); // Sunday, July 19, 2020 console.log( date.toLocaleDateString(‘fr-FR’, { month: ‘long’, …
Continue reading “Natively Format JavaScript Dates and Times”
From the Polymer team: Tachometer is a tool for running benchmarks in web browsers. It uses repeated sampling and statistics to reliably identify even tiny differences in runtime. To compare two files, run it like so: npx tachometer variant1.html variant2.html Tachometer will open Chrome and load each HTML file, measuring the time between bench.start() and …
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Did you know you can import JSON and CSS files just like you import JavaScript Modules? Thanks to Import Assertions, it’s as easy as this: Building upon "Import Assertions" we recently saw JSON Modules land in V8/Chromium 91: “`import json from './foo.json' assert { type: 'json' };“` In Chromium 93 the same thing for CSS …
Continue reading “ESNext: Import Assertions (JSON Modules, CSS Modules, …)”
I’m a huge mapping nerd, so I’m a sucker for the Maps JavaScript API WebGL beta which was announced at Google I/O back in May: Introduced are three new features: WebGL Overlay View lets you add custom 2D and 3D graphics and animated content to your maps. Tilt and heading can now be adjusted programmatically, …
Percollate is a command-line tool that turns web pages into beautifully formatted PDF, EPUB, or HTML files. Installation per NPM npm install -g percollate Once installed you can, for example, run this: percollate epub https://brm.us/at-layer -o css-at-layer.epub Percollate will automatically extract the main content (powered by Mozilla’s Readability.js), perform some enhancements on it (such as …