SpeechGrammarList: addFromString() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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.
Syntax
addFromString(string)
addFromString(string, weight)
Parameters
string-
A string representing the grammar to be added.
weightOptional-
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 between0.0and1.0; If not specified, the default used is1.0.
Return value
None (undefined).
Examples
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;
Specifications
| Specification |
|---|
| Web Speech API # dom-speechgrammarlist-addfromstring |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
addFromString | ||||||||||||