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Firefox for Web Developers

@webdevs.firefox.com

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

Firefox for Web Developers

@webdevs.firefox.com

The full docs on MDN: developer.mozilla.org/en-US/docs/W...

developer.mozilla.orgattr() CSS function - CSS | MDNThe attr() CSS function is used to retrieve the value of an attribute of the selected element and use it in a property value, similar to how the var() function substitutes a custom property value. It…

3/9/26, 1:16 pm1 repost9 likes

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