Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The addFromString() method of the SpeechGrammarList interface takes a grammar present in a specific string within the code base (e.g. stored in a variable) and adds it to the SpeechGrammarList as a new SpeechGrammar object.
js
addFromString(string)
addFromString(string, weight)
string
A string representing 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.
None (undefined).
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;
| Specification |
|---|
| Web Speech API # dom-speechgrammarlist-addfromstring |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
addFromString |
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/addFromString