opacityBaseline · Widely available
The opacity CSS property sets the transparency of an element.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1+Supportedsince Nov 9, 2004
Current: 157Safari
1–1.3Not supported
2+Supportedsince Apr 29, 2005
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: opacity.
Feature detection
CSS · check before using
@supports (opacity: initial) {
/* styles that rely on opacity */
}
/* or in JavaScript */
if (CSS.supports("opacity", "initial")) {
// use it
}Specification
Usage share
Sub-features
Support for each part of the feature (5). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| opacity | 1 | 12 | 1 | 2 | 18 | 4 | 1 |
| opacity.percentages | 78 | 79 | 70 | 13.1 | 78 | 79 | 13.4 |
| <number> | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| <number>.scientific_notation | 43 | 12 | 29 | 10.1 | 43 | 29 | 10.3 |
| svg.global_attributes.opacity | 1 | 12 | 1 | 2 | 18 | 4 | 1 |