There are some new properties that allow playing a css animation based on the scroll position. Apple has been using this on their marketing pages. The property seems pretty powerful. But how powerful? This got me thinking… could it play a video as pure CSS?

A shortcoming of MutationObserver is that it cannot be used to subscribe to value changes of CSS properties. To plug that hole I built a library allowing just that. It allows you to attach JavaScript callbacks to changes in computed values of CSS properties.

What Una didn’t cover, on purpose surely, was exit animations (because they aren’t in “Baseline” yet, meaning not supported across browsers). But they are supported in Chrome-n-friends land, so I thought it was worth looking at. To me, they are just as interesting, cool, and useful as the entry kind.

Explore common misconceptions about optimizing Largest Contentful Paint (LCP) by looking beyond image optimization and considering factors like Time to First Byte (TTFB) and resource load delay.

When I point out what the Conformance Levels do, my short, easy to learn explanation is: A: Removes many barriers for many disabled people; AA: Removes most barriers for most disabled people; AAA: Removes additional barriers;