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.
SpeechGrammarList.SpeechGrammarList()
SpeechGrammarList
object.SpeechGrammarList.length
Read only
SpeechGrammar
objects contained in the SpeechGrammarList
.SpeechGrammarList.item()
SpeechGrammar
objects to be retrieved from the SpeechGrammarList
using array syntax.SpeechGrammarList.addFromURI()
SpeechGrammarList
as a new SpeechGrammar
object.SpeechGrammarList.addFromString()
DOMString
within the code base (e.g. stored in a variable) and adds it 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 recognised by the SpeechRecognition
instance using the SpeechRecognition.grammars
property.
var 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 ;' var recognition = new SpeechRecognition(); var speechRecognitionList = new SpeechGrammarList(); speechRecognitionList.addFromString(grammar, 1); recognition.grammars = speechRecognitionList;
Specification | Status | Comment |
---|---|---|
Web Speech API The definition of 'SpeechGrammarList' in that specification. | Draft |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 33 [1] | 44 (44) [2] | No support | No support | No support |
weight | 33 [1] | No support | No support | No support | No support |
Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | ? | (Yes)[1] | ? | 2.5 | No support | No support | No support |
weight | ? | (Yes)[1] | No support | No support | No support | No support | No support |
webkitSpeechRecognition
; You'll also need to serve your code through a web server for recognition to work.media.webspeech.recognition.enable
flag in about:config, although note that currently speech recognition won't work on Desktop Firefox — it will be properly exposed soon, once the required internal permissions are sorted out.To use speech recognition in an app, you need to specify the following permissions in your manifest:
"permissions": { "audio-capture" : { "description" : "Audio capture" }, "speech-recognition" : { "description" : "Speech recognition" } }
You also need a privileged app, so you need to include this as well:
"type": "privileged"
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/SpeechGrammarList