SpeechGrammarList
Deprecated
Avoid using this feature in new projects. Advancements in speech recognition mean that speech grammars are not needed to achieve low error rates. This feature may be a candidate for removal from web standards or browsers.
The SpeechGrammarList interface of the Web Speech API represents a list of SpeechGrammar objects containing words or patterns of words that we want the recognition service to recognize.
Grammar is defined using JSpeech Grammar Format (JSGF).
Note: The concept of grammar has been removed from the Web Speech API. Related features remain in the specification and are still recognized by supporting browsers for backwards compatibility, but they have no effect on speech recognition services.
Constructor
SpeechGrammarList()-
Creates a new
SpeechGrammarListobject.
Instance properties
SpeechGrammarList.lengthRead only-
Returns the number of
SpeechGrammarobjects contained in theSpeechGrammarList.
Instance methods
SpeechGrammarList.item()-
Standard getter — allows individual
SpeechGrammarobjects to be retrieved from theSpeechGrammarListusing array syntax. SpeechGrammarList.addFromURI()-
Takes a grammar present at a specific URI and adds it to the
SpeechGrammarListas a newSpeechGrammarobject. SpeechGrammarList.addFromString()-
Adds a grammar in a string to the
SpeechGrammarListas a newSpeechGrammarobject.
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 # speechgrammarlist |