Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The length read-only property of the SpeechGrammarList interface returns the number of SpeechGrammar objects contained in the SpeechGrammarList.
A number indicating the number of SpeechGrammar objects contained in the SpeechGrammarList.
js
const 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 ;"; const recognition = new SpeechRecognition(); const speechRecognitionList = new SpeechGrammarList(); speechRecognitionList.addFromString(grammar, 1); recognition.grammars = speechRecognitionList; speechRecognitionList.length; // should return 1.
| Specification |
|---|
| Web Speech API # dom-speechgrammarlist-length |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
length |
33 | 79 | No | No | No | No | 4.4.3 | 33 | No | No | No | 2.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/SpeechGrammarList/length