Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
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.) Other formats may also be supported in the future.
ConstructorSpeechGrammarList()
Experimental
Creates a new SpeechGrammarList
object.
SpeechGrammarList.length
Read only Experimental
Returns the number of SpeechGrammar
objects contained in the SpeechGrammarList
.
SpeechGrammarList.item()
Experimental
Standard getter â allows individual SpeechGrammar
objects to be retrieved from the SpeechGrammarList
using array syntax.
SpeechGrammarList.addFromURI()
Experimental
Takes a grammar present at a specific URI and adds it to the SpeechGrammarList
as a new SpeechGrammar
object.
SpeechGrammarList.addFromString()
Experimental
Adds a grammar in a string to the SpeechGrammarList
as a new SpeechGrammar
object.
In our simple Speech color changer example, we create a new SpeechRecognition
object instance using the SpeechRecognition()
constructor, create a new SpeechGrammarList
, add our grammar string to it using the SpeechGrammarList.addFromString
method, and set it to be the grammar that will be recognized by the SpeechRecognition
instance using the SpeechRecognition.grammars
property.
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 Browser compatibility See also
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