Setting width with CSS attr()

Question

I\'m trying to set the width of an element using attr() in CSS but it\'s not working. Chrome says \"invalid property value\" but I\'m not sure what\'s wrong.

I\'m tr

Answer 1

Support for attributes other than content is Experimental. In other words, browsers do not support this yet even though it is seemingly valid.

Here is an example showing that it does work with content, but not width.