SpeechGrammarList: addFromURI() method

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 addFromURI() method of the SpeechGrammarList interface takes a grammar present at a specific URI and adds it to the SpeechGrammarList as a new SpeechGrammar object.

Note that some speech recognition services may support built-in grammars that can be specified by URI.

Syntax

addFromURI(src)
addFromURI(src, weight)

Parameters

src: A string representing the URI of the grammar to be added.
weight Optional: A float representing the weight of the grammar relative to other grammars present in the SpeechGrammarList. The weight means the importance of this grammar, or the likelihood that it will be recognized by the speech recognition service. The value can be between 0.0 and 1.0; If not specified, the default used is 1.0.

Return value

None (undefined).

Specifications

Specification
Web Speech API # dom-speechgrammarlist-addfromuri

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
`addFromURI` Deprecated	Chrome – Full support Chrome 33 (Release date: 2014-02-20) 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 – No support Opera footnote No support	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 33 (Release date: 2014-02-26) footnote Full support	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – No support Opera Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 2 (Release date: 2014-10-17) footnote Full support	WebView Android – Full support WebView Android 4.4.3 (Release date: 2014-06-02) footnote Full support	WebView on iOS – No support WebView on iOS footnote No support

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.