Web/API/SpeechGrammar

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The SpeechGrammar interface of the Web Speech API represents a set of words or patterns of words that we want the recognition service to recognize.

Grammar is defined using JSpeech Grammar Format (JSGF.) Other formats may also be supported in the future.

Constructor

SpeechGrammar.SpeechGrammar(): Creates a new SpeechGrammar object.

Properties

SpeechGrammar.src: Sets and returns a string containing the grammar from within in the SpeechGrammar object instance.
SpeechGrammar.weight Optional: Sets and returns the weight of the SpeechGrammar object.

Examples

var grammar = '#JSGF V1.0; grammar colors; public <color> = aqua | azure | beige | bisque | black | blue | brown | chocolate | coral | crimson | cyan | fuchsia | ghostwhite | gold | goldenrod | gray | green | indigo | ivory | khaki | lavender | lime | linen | magenta | maroon | moccasin | navy | olive | orange | orchid | peru | pink | plum | purple | red | salmon | sienna | silver | snow | tan | teal | thistle | tomato | turquoise | violet | white | yellow ;'
var recognition = new SpeechRecognition();
var speechRecognitionList = new SpeechGrammarList();
speechRecognitionList.addFromString(grammar, 1);
recognition.grammars = speechRecognitionList;


console.log(speechRecognitionList[0].src); // should return the same as the contents of the grammar variable
console.log(speechRecognitionList[0].weight); // should return 1 - the same as the weight set in line 4.

Specifications

Specification	Status	Comment
Web Speech APIThe definition of 'SpeechGrammar' in that specification.	Draft

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SpeechGrammar` Experimental'	Chrome Full support 25 Prefixed' Full support 25 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 79 Prefixed' Full support 79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support 44 Notes' Disabled' Full support 44 Notes' Disabled' Notes' Note that currently only the speech synthesis part is available in Firefox Desktop - the speech recognition part will be available soon, once the required internal permissions are sorted out. Disabled' From version 44: this feature is behind the `media.webspeech.recognition.enable` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 27	Safari No support No	WebView Android No support No	Chrome Android Full support 64 Prefixed' Full support 64 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 9.0 Prefixed' Full support 9.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`SpeechGrammar()` constructor Experimental'	Chrome Full support 25 Prefixed' Full support 25 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 79 Prefixed' Full support 79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Full support 44 Notes' Disabled' Full support 44 Notes' Disabled' Notes' Note that currently only the speech synthesis part is available in Firefox Desktop - the speech recognition part will be available soon, once the required internal permissions are sorted out. Disabled' From version 44: this feature is behind the `media.webspeech.recognition.enable` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 27	Safari No support No	WebView Android No support No	Chrome Android Full support 64 Prefixed' Full support 64 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 9.0 Prefixed' Full support 9.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit
`src` Experimental'	Chrome Full support 25	Edge Full support 79	Firefox Full support 44 Notes' Disabled' Full support 44 Notes' Disabled' Notes' Note that currently only the speech synthesis part is available in Firefox Desktop - the speech recognition part will be available soon, once the required internal permissions are sorted out. Disabled' From version 44: this feature is behind the `media.webspeech.recognition.enable` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 27	Safari No support No	WebView Android No support No	Chrome Android Full support 64	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 9.0
`weight` Experimental'	Chrome Full support 25	Edge Full support 79	Firefox Full support 44 Notes' Disabled' Full support 44 Notes' Disabled' Notes' Note that currently only the speech synthesis part is available in Firefox Desktop - the speech recognition part will be available soon, once the required internal permissions are sorted out. Disabled' From version 44: this feature is behind the `media.webspeech.recognition.enable` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 27	Safari No support No	WebView Android No support No	Chrome Android Full support 64	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 9.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.