Lexical grammar

Read More at MDN DocsView Spec

Safe to Use

Lexical grammar is considered safe to use.

It’s supported by 92% of global browsers.

Browsers

ChromeJun 4, 2019v75.0.0
25%╱98%
There are no users of Chrome running a supported version.
SafariSep 19, 2019v13.0.0
5%╱96%
There are no users of Safari running a supported version.
EdgeJan 15, 2020v79.0.0
5%╱100%
There are no users of Edge running a supported version.
FirefoxOct 22, 2019v70.0.0
2%╱98%
There are no users of Firefox running a supported version.

Servers

Node.jsJun 26, 2019v12.5.0
Node.js supports this feature.
DenoJul 13, 2020v1.2.0
Deno supports this feature.

Version Breakdown

 
Agent
Support
Adoption
Chrome
Jun 4, 2019 v75.0.0
25%╱98%
There are no users of Chrome running a supported version.
Jun 4, 2019 – Latest
v75.0.0+
25%╱98%

Full Support

Chrome Android
Jun 4, 2019 v75.0.0
36%╱100%
There are no users of Chrome Android running a supported version.
Jun 4, 2019 – Latest
v75.0.0+
36%╱100%

Full Support

Deno
Jul 13, 2020 v1.2.0
Deno supports this feature.
Jul 13, 2020 – Latest
v1.2.0+

Full Support

Edge
Jan 15, 2020 v79.0.0
5%╱100%
There are no users of Edge running a supported version.
Jan 15, 2020 – Latest
v79.0.0+
5%╱100%

Full Support

Firefox
Oct 22, 2019 v70.0.0
2%╱98%
There are no users of Firefox running a supported version.
Oct 22, 2019 – Latest
v70.0.0+
2%╱98%

Full Support

Firefox for Android
Jul 28, 2020 v79.0.0
Firefox for Android supports this feature.
Jul 28, 2020 – Latest
v79.0.0+

Full Support

Internet Explorer
Unsupported
Internet Explorer does not support this feature.

No Support

Node.js
Jun 26, 2019 v12.5.0
Node.js supports this feature.
Jun 26, 2019 – Latest
v12.5.0+

Full Support

Jun 6, 2018 – Latest
v10.4.0+

This feature is behind the --harmony runtime_flag

 
Quest Browser
Unknown v7.0.0
Quest Browser supports this feature.
Unknown
v7.0.0+

Full Support

Opera
Jun 27, 2019 v62.0.0
1%╱97%
There are no users of Opera running a supported version.
Jun 27, 2019 – Latest
v62.0.0+
1%╱97%

Full Support

Opera Android
Unsupported
Opera Android does not support this feature.

No Support

Safari
Sep 19, 2019 v13.0.0
5%╱96%
There are no users of Safari running a supported version.
Sep 19, 2019 – Latest
v13.0.0+
5%╱96%

Full Support

Safari on iOS
Sep 19, 2019 v13.0.0
16%╱97%
There are no users of Safari on iOS running a supported version.
Sep 19, 2019 – Latest
v13.0.0+
16%╱97%

Full Support

Samsung Internet
Dec 5, 2019 v11.0.0
2%╱93%
There are no users of Samsung Internet running a supported version.
Dec 5, 2019 – Latest
v11.0.0+
2%╱93%

Full Support

WebView Android
Jun 4, 2019 v75.0.0
WebView Android supports this feature.
Jun 4, 2019 – Latest
v75.0.0+

Full Support

See Also

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