Classes

Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are unique to classes.

Read More at MDN DocsView Spec

Safe 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, 2015v9.0.0
5%╱100%
100% of Safari users are running a supported version.
EdgeNov 12, 2015v13.0.0
5%╱100%
100% of Edge users are running a supported version.
FirefoxMar 8, 2016v45.0.0
3%╱100%
100% of Firefox users are running a supported version.

Servers

Node.jsApr 26, 2016v6.0.0
Node.js supports this feature.
DenoMay 4, 2020v1.0.0
Deno supports this feature.

Version Breakdown

 
Agent
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

 
Quest Browser
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.

See Also

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