Classes
Read More at MDN DocsView SpecSafe to Use
Classes is considered safe to use.
It’s supported by 94% of global browsers.
Browsers
ChromeMar 2, 2016v49.0.0
26%╱100%
There are no users of Chrome running a supported version.
SafariSep 30, 2015v9.0.05%╱100%
100% of Safari users are running a supported version.
EdgeNov 12, 2015v13.0.05%╱100%
100% of Edge users are running a supported version.
FirefoxMar 8, 2016v45.0.03%╱100%
100% of Firefox users are running a supported version.
Servers
Node.jsApr 26, 2016v6.0.0
Node.js supports this feature.
DenoMay 4, 2020v1.0.0Deno supports this feature.
Version Breakdown
Support
Adoption
Chrome
Mar 2, 2016 v49.0.0
26%╱100%
There are no users of Chrome running a supported version.
Mar 2, 2016 – Latest
v49.0.0+
26%╱100%
Full Support
Mar 2, 2016 – Latest
v49.0.0+
No Support, Feature Removed
Apr 14, 2015 – Mar 2, 2016
v42.0.0 – v49.0.0
0%╱0%
Full Support
Strict mode is required.
Chrome Android
Mar 9, 2016 v49.0.0
36%╱100%
100% of Chrome Android users are running a supported version.
Mar 9, 2016 – Latest
v49.0.0+
36%╱100%
Full Support
Mar 9, 2016 – Latest
v49.0.0+
No Support, Feature Removed
Apr 15, 2015 – Mar 9, 2016
v42.0.0 – v49.0.0
Full Support
Strict mode is required.
Deno
May 4, 2020 v1.0.0
Deno supports this feature.
May 4, 2020 – Latest
v1.0.0+
Full Support
Edge
Nov 12, 2015 v13.0.0
5%╱100%
100% of Edge users are running a supported version.
Nov 12, 2015 – Latest
v13.0.0+
5%╱100%
Full Support
Firefox
Mar 8, 2016 v45.0.0
3%╱100%
100% of Firefox users are running a supported version.
Mar 8, 2016 – Latest
v45.0.0+
3%╱100%
Full Support
Firefox for Android
Mar 8, 2016 v45.0.0
Firefox for Android supports this feature.
Mar 8, 2016 – Latest
v45.0.0+
Full Support
Internet Explorer
Unsupported
Internet Explorer does not support this feature.
No Support
Node.js
Apr 26, 2016 v6.0.0
Node.js supports this feature.
Apr 26, 2016 – Latest
v6.0.0+
Full Support
Oct 29, 2015 – Latest
v5.0.0+
This feature is behind the --harmony runtime_flag
Sep 8, 2015 – Latest
v4.0.0+
This feature is behind the --use_strict runtime_flag
Unknown v5.0.0
Quest Browser supports this feature.
Unknown
v5.0.0+
Full Support
Opera
Mar 15, 2016 v36.0.0
1%╱100%
100% of Opera users are running a supported version.
Mar 15, 2016 – Latest
v36.0.0+
1%╱100%
Full Support
Mar 15, 2016 – Latest
v36.0.0+
No Support, Feature Removed
Apr 28, 2015 – Mar 15, 2016
v29.0.0 – v36.0.0
Full Support
Strict mode is required.
Opera Android
Mar 31, 2016 v36.0.0
Opera Android supports this feature.
Mar 31, 2016 – Latest
v36.0.0+
Full Support
Mar 31, 2016 – Latest
v36.0.0+
No Support, Feature Removed
Apr 28, 2015 – Mar 31, 2016
v29.0.0 – v36.0.0
Full Support
Strict mode is required.
Safari
Sep 30, 2015 v9.0.0
5%╱100%
100% of Safari users are running a supported version.
Sep 30, 2015 – Latest
v9.0.0+
5%╱100%
Full Support
Safari on iOS
Sep 16, 2015 v9.0.0
16%╱100%
There are no users of Safari on iOS running a supported version.
Sep 16, 2015 – Latest
v9.0.0+
16%╱100%
Full Support
Samsung Internet
Dec 15, 2016 v5.0.0
2%╱95%
There are no users of Samsung Internet running a supported version.
Dec 15, 2016 – Latest
v5.0.0+
2%╱95%
Full Support
Dec 15, 2016 – Latest
v5.0.0+
No Support, Feature Removed
Mar 11, 2016 – Dec 15, 2016
v4.0.0 – v5.0.0
0%╱1%
Full Support
Strict mode is required.
WebView Android
Mar 9, 2016 v49.0.0
WebView Android supports this feature.
Mar 9, 2016 – Latest
v49.0.0+
Full Support
Mar 9, 2016 – Latest
v49.0.0+
No Support, Feature Removed
Apr 15, 2015 – Mar 9, 2016
v42.0.0 – v49.0.0
Full Support
Strict mode is required.