The journey to create a polyfill for the upcoming CSS random() function that works in all browsers.

Well, that’s a wrap. No, not a flex-wrap, but rather today marks a new day, week, month, season, aaaand new edition of What’s important (#18), bringing you the best content that developers have produced over the last couple of weeks or so.

The general idea is that we create a Document Picture-in-Picture window (DPIP window), and then we put HTML, CSS, and JavaScript into it.

Seven and half years after blocks arrived in Core, WordPress introduces a way to build blocks without React annd build pipelines. All you need is PHP.

Apply a style when someone navigates from one specific page to another. The idea being it'd make the sources for cross-document view transitions declarative in CSS rather than managing that stuff in JavaScript.

Plus, how to style skeleton UIs, how to enable diagonal scrolling, how images can overflow themselves, and yet, still more. Basically, how to do a lot of really cool (CSS) stuff.

The warning is correct. And the recommended fixes you've probably seen are wrong. Here's what you can do instead to properly fix the issue.

Border images are an overlooked feature. One neat fact is that border image slices can run across entire borders on an element, and animating it creates beautiful effects.

There's a lot of nuance to the <dialog> element, a seemingly little piece of web architecture. I've got some notes from digging into it.

A few notes and takeaways from the 2026 State of CSS survey results, including a nice CSS-Tricks cameo!