Let's Define CSS 4 — It seems whether CSS 4 should be a “thing” is a hot button issue right now, with most of the chatter seemingly around branding it as such for marketing reasons. Here’s Jen Simmons with her take, and the position of the CSS Working Group. This GitHub thread is open to comments from developers and designers for their thoughts.

World Wide Web Consortium

A Complete Guide to Data Attributes — Everything you ever wanted to know about data attributes in HTML, CSS, and JavaScript.

Chris Coyier

2021 Reasons to Use Clubhouse.io — #1 Clubhouse encourages collaboration. #2 Using it isn't a slog. #3 Your team will get more done. #4 It's free for up to 10 users. #5 You know what, we really should have considered character limits when we came up with this idea.

Clubhouse.io sponsor

oldweb.today: Browse Old Web Pages The Old Way with Virtual Browsers — An impressive browser-based tool that allows you to browse public web archives in a recreation of a legacy browser of your choice.

Rhizome

Product Designer - Komoot (Remote Position) — We're looking for a talented product designer to take over the design of one of our core products on all platforms (Web, iOS, Android).

Komoot

Find a Dev Job Through Vettery — Vettery is completely free for job seekers. Make a profile, name your salary, and connect with hiring managers from top employers.

Vettery

Styling The Good Ol' Button Element — A thorough look at the finer details of the button element, plus how to style it to ensure it works great on all browsers.

Ahmad Shadeed

Introducing the Page Visibility API — Modern browers generally handle page visibility stuff on their own nowadays, but you can do a little more with the API, which has excellent browser support.

John Au-Yeung

How to Create a Diagonal Layout with CSS — View an interactive demo of the effect. Uses transforms, pseudo-elements, and custom properties to achieve the layout.

nils binder

How to Setup Webpack and Babel 7 for React — If you’ve learned to get a React project up and running using create-react-app, this is a nice detailed tutorial to take that to the next level using two popular tools.

Ismile Hossain

MDN Browser Compatibility Survey — This survey from Mozilla is looking to find out what your pain points are in regards to browser compatibility.

Mozilla

Google PageSpeed Insights: The Truth About Scoring 100/100

Brian Jackson

ImageCon: Great Media Experience for U and I

Cloudinary sponsor

Release Notes for Safari Technology Preview 101

Jon Davis

Blisk: A Developer-Oriented Browser for Faster App Testing — Has a number of built-in testing features including multiple device views, URL and scroll sync, auto-refresh, screenshots, and screen recorder.

Blisk Team

Paged.js: Formats HTML Content Suitably for Creating PDF Output — I think this project’s site could win an award for sheer elegance, but it’s not just elegant, there’s tons of well formatted documentation too. Or.. if you prefer, the GitHub repo.

Cabbage Tree Labs

Svelte-grid: A Draggable and Resizable Responsive Grid Layout for Svelte — The on-page demo works really nicely. You can easily resize the elements to fit after dragging them around. It’s basically a customizable masonry layout.

Vahe Araqelyan

Axe Pro: Free Accessibility Testing Tool Created for Dev Teams — Unique mix of guided & automated tests. Manage multiple tests, limit the scope of your testing, export results, and more.

Deque sponsor

Lion: A Library of Performant, Accessible & Flexible Web Components — From ING, known for their work with components, this is a set of feature-complete web components for kickstarting web projects. Announcement post is here.

ING Bank

Hex Engine: A Modern 2D Game Engine for the Browser — Still in early development. A TypeScipt- and Canvas-based game engine designed to feel similar to React.

Lily Scott

monica.css — A really tiny set of helper classes to make it easier to work with flexbox layouts.

Monica Dinculescu