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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:

I feel like there might be something I'm missing, because while this is good for showing the technicals of how it works, it doesn't really tell me why it's a valuable thing to have. Maybe I've just been out of the web loop too long.

Firefox for Web Developers

@webdevs.firefox.com

I used this recently in custom select, to pull the label attribute of an optgroup into an inner legend element. Yes, I could write some JS to do the same thing, but doing it in a couple of lines of CSS was much quicker and more reliable.

3/9/26, 4:52 pm0 reposts1 like

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