SpeechGrammar: weight property

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The optional weight property of the SpeechGrammar interface sets and returns the weight of the SpeechGrammar object.

Value

A float representing the weight of the grammar, in the range 0.0–1.0.

Specifications

Specification
Web Speech API
# dom-speechgrammar-weight

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
weight
Deprecated
Chrome – Full support
Chrome 25 (Release date: 2013-02-21)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox 142 (Release date: 2025-08-19)
disabled
disabled From version 142 users must explicitly set the media.webspeech.recognition.enable preference to true. To change preferences in Firefox, visit about:config.
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 25 (Release date: 2013-02-27)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 14 (Release date: 2013-05-21)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 1.5 (Release date: 2013-09-25)
footnote Full support
WebView Android – No support
WebView Android
footnote No support
WebView on iOS – No support
WebView on iOS
footnote No support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Deprecated. Not for use in new websites.
User must explicitly enable this feature.

See also