Custom properties (--*): CSS variables

Read More at MDN DocsView Spec

Safe to Use

Custom properties (--*): CSS variables is considered safe to use.

It’s supported by 95% of global browsers.

Browsers

ChromeMar 2, 2016v49.0.0
24%╱100%
There are no users of Chrome running a supported version.
SafariMar 21, 2016v9.1.0
4%╱100%
100% of Safari users are running a supported version.
EdgeApr 5, 2017v15.0.0
4%╱100%
100% of Edge users are running a supported version.
FirefoxJul 22, 2014v31.0.0
3%╱100%
100% of Firefox users are running a supported version.

Version Breakdown

 
Agent
Support
Adoption
Chrome
Mar 2, 2016 v49.0.0
24%╱100%
There are no users of Chrome running a supported version.
Mar 2, 2016 – Latest
v49.0.0+
24%╱100%

Full Support

Chrome Android
Mar 9, 2016 v49.0.0
39%╱99%
There are no users of Chrome Android running a supported version.
Mar 9, 2016 – Latest
v49.0.0+
39%╱99%

Full Support

Edge
Apr 5, 2017 v15.0.0
4%╱100%
100% of Edge users are running a supported version.
Apr 5, 2017 – Latest
v15.0.0+
4%╱100%

Full Support

Firefox
Jul 22, 2014 v31.0.0
3%╱100%
100% of Firefox users are running a supported version.
Jul 22, 2014 – Latest
v31.0.0+
3%╱100%

Full Support

Firefox for Android
Jul 22, 2014 v31.0.0
Firefox for Android supports this feature.
Jul 22, 2014 – Latest
v31.0.0+

Full Support

Internet Explorer
Unsupported
Internet Explorer does not support this feature.

No Support

 
Quest Browser
Unknown v5.0.0
Quest Browser supports this feature.
Unknown
v5.0.0+

Full Support

Opera
Mar 15, 2016 v36.0.0
2%╱100%
100% of Opera users are running a supported version.
Mar 15, 2016 – Latest
v36.0.0+
2%╱100%

Full Support

Opera Android
Mar 31, 2016 v36.0.0
Opera Android supports this feature.
Mar 31, 2016 – Latest
v36.0.0+

Full Support

Safari
Mar 21, 2016 v9.1.0
4%╱100%
100% of Safari users are running a supported version.
Mar 21, 2016 – Latest
v9.1.0+
4%╱100%

Full Support

Safari on iOS
Mar 21, 2016 v9.3.0
17%╱100%
There are no users of Safari on iOS running a supported version.
Mar 21, 2016 – Latest
v9.3.0+
17%╱100%

Full Support

Samsung Internet
Dec 15, 2016 v5.0.0
2%╱94%
There are no users of Samsung Internet running a supported version.
Dec 15, 2016 – Latest
v5.0.0+
2%╱94%

Full Support

WebView Android
Mar 9, 2016 v49.0.0
WebView Android supports this feature.
Mar 9, 2016 – Latest
v49.0.0+

Full Support

See Also

Contribute