Web platform features explorer

attr() (content only)

Widely available since 2018-01-29
Tags: css Groups: CSS

The attr() CSS function, in content property declarations, sets a ::before or ::after pseudo-element's content to the value of the specified HTML attribute.

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Browser support

  • Chrome 2 Released on 2009-05-21
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 1 Released on 2004-11-09
  • Firefox for Android 4 Released on 2011-03-29
  • Safari 3.1 Released on 2008-03-18
  • Safari on iOS 2 Released on 2008-07-11