In this week’s roundup, we highlight a proposal for a new <popup> element, check the use of prefers-reduced-motion on award-winning sites, learn how to opt into cross-origin isolation, see how WhiteHouse.gov approaches accessibility, and warn the dangers of 100vh. Let’s get into the news! The new HTML <popup>...

In every project where I use Tailwind CSS, I end up adding something to it. Some of these things I add in every single project. I’ll share these with you, but I’m also curious what y’all are adding to your tailwind.css files. I’ll start with myself. In each project: I define -webkit-tap-highlight-color. I add a bottom...

A wonderful post by Josh that both introduces CSS transitions and covers the nuances for using them effectively. I like the advice about transitioning the position of an element, leaving the original space it occupied alone so it doesn’t result in what he calls “doom flicker.” Six hundred and fifty years ago I created...

Tobi Reif notes how the position of custom fonts set at very large font sizes can be super different, even in the same browser across operating systems. The solution? Well, you know how there are certain CSS properties that only work within @font-face blocks? They are called “descriptors” and font-display is a popular...

I recently started working on a Progressive Web App (PWA) for a client with my team. We’re using React with client-side routing via React Router, and one of the first elements that we made was the main menu. Menus are a key component of any site or app. That’s really how folks get around, so making it accessible was a...

Sendbird is a service for helping you add social features to your app. Wanna add in-app chat? Sendbird does that. Wanna add in-app voice or video calls? Sendbird does that. Here’s how I always think about stuff like this. Whatever the thing you are building is, you should specialize in the core of it, and not get bogged...

It feels like a trend (and a smart one) for tech platforms to invest in really high-quality learning material for their platform. Let’s have a gander. Webflow University Surely Webflow is thinking: if people invest in learning Webflow, they’ll be able to build what they need for themselves and their clients in Weblow,...

The other day, Florens Verschelde asked about defining dark mode styles for both a class and a media query, without repeat CSS custom properties declarations. I had run into this issue in the past but hadn’t come up with a proper solution. What we want is to avoid redefining—and thus repeating—custom properties when switching...

A wonderful collection of little layout-related CSS snippets from Stephanie Eckles that serves both as a quick reference and a reminder of how straightforward and powerful CSS has become. Random things to note! The resizeable containers aren’t some JavaScript library. They are just <div>s with resize: horizontal;...

We’ve covered the idea of hiding things in CSS many times here, the most recent post being Marko Ilic’s “Comparing Various Ways to Hide Things in CSS” which did a nice job of comparing different techniques which you’d use in different situations. Hugo “Kitty” Giraudel has done something similar in “Hiding Content...

Of all the reasons we love and use Jetpack for CSS-Tricks—a poster child WordPress site—is that we can sleep easy at night knowing we have real-time backups running with Jetpack Backup. That way, no matter what, everything that makes this site tick, from all the template files to every single word we’ve ever typed, is...

React component tests should be interesting, straightforward, and easy for a human to build and maintain. Yet, the current state of the testing library ecosystem is not sufficient to motivate developers to write consistent JavaScript tests for React components. Testing React components—and the DOM in general—often require...