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CSS attr() now works on all properties in Firefox 155. Here's how it works, and how to get the most out of it:

@riverofberlin.bsky.social

does this come with any performance considerations as well that I need to be careful of? - I assume this is live, so changing the value of an attribute would change it in css as well

Firefox for Web Developers

@webdevs.firefox.com

Yeah, it's live. Changing attributes already triggers CSS changes via selectors, so I don't expect this to introduce performance concerns.

3/9/26, 2:13 pm0 reposts0 likes

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