opacity
Widely available since 2018-01-29
The opacity CSS property sets the transparency of an element.
Learning resources on MDN
Browser support
- Chrome 1 Released on 2008-12-11
- 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 2 Released on 2005-04-29
- Safari on iOS 1 Released on 2007-06-29