var

Read More at MDN DocsView Spec

Safe to Use

var is considered safe to use.

It’s supported by 94% of global browsers.

Browsers

ChromeDec 11, 2008v1.0.0
26%╱100%
100% of Chrome users are running a supported version.
SafariJun 23, 2003v1.0.0
5%╱100%
100% of Safari users are running a supported version.
EdgeJul 28, 2015v12.0.0
5%╱100%
100% of Edge users are running a supported version.
FirefoxNov 9, 2004v1.0.0
3%╱100%
100% of Firefox users are running a supported version.

Servers

Node.jsMar 11, 2013v0.10.0
Node.js supports this feature.
DenoMay 4, 2020v1.0.0
Deno supports this feature.

Version Breakdown

 
Agent
Support
Adoption
Chrome
Dec 11, 2008 v1.0.0
26%╱100%
100% of Chrome users are running a supported version.
Dec 11, 2008 – Latest
v1.0.0+
26%╱100%

Full Support

Chrome Android
Jun 27, 2012 v18.0.0
36%╱100%
100% of Chrome Android users are running a supported version.
Jun 27, 2012 – Latest
v18.0.0+
36%╱100%

Full Support

Deno
May 4, 2020 v1.0.0
Deno supports this feature.
May 4, 2020 – Latest
v1.0.0+

Full Support

Edge
Jul 28, 2015 v12.0.0
5%╱100%
100% of Edge users are running a supported version.
Jul 28, 2015 – Latest
v12.0.0+
5%╱100%

Full Support

Firefox
Nov 9, 2004 v1.0.0
3%╱100%
100% of Firefox users are running a supported version.
Nov 9, 2004 – Latest
v1.0.0+
3%╱100%

Full Support

Firefox for Android
Mar 29, 2011 v4.0.0
Firefox for Android supports this feature.
Mar 29, 2011 – Latest
v4.0.0+

Full Support

Internet Explorer
Aug 13, 1996 v3.0.0
0%╱100%
100% of Internet Explorer users are running a supported version.
Aug 13, 1996 – Latest
v3.0.0+
0%╱100%

Full Support

Node.js
Mar 11, 2013 v0.10.0
Node.js supports this feature.
Mar 11, 2013 – Latest
v0.10.0+

Full Support

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

Full Support

Opera
Dec 1, 1997 v3.0.0
1%╱100%
100% of Opera users are running a supported version.
Dec 1, 1997 – Latest
v3.0.0+
1%╱100%

Full Support

Opera Android
Nov 9, 2010 v10.1.0
Opera Android supports this feature.
Nov 9, 2010 – Latest
v10.1.0+

Full Support

Safari
Jun 23, 2003 v1.0.0
5%╱100%
100% of Safari users are running a supported version.
Jun 23, 2003 – Latest
v1.0.0+
5%╱100%

Full Support

Safari on iOS
Jun 29, 2007 v1.0.0
17%╱100%
100% of Safari on iOS users are running a supported version.
Jun 29, 2007 – Latest
v1.0.0+
17%╱100%

Full Support

Samsung Internet
Apr 27, 2013 v1.0.0
2%╱100%
100% of Samsung Internet users are running a supported version.
Apr 27, 2013 – Latest
v1.0.0+
2%╱100%

Full Support

WebView Android
Dec 9, 2013 v4.4.0
WebView Android supports this feature.
Dec 9, 2013 – Latest
v4.4.0+

Full Support

See Also

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