This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The continuous
property of the SpeechRecognition
interface controls whether continuous results are returned for each recognition, or only a single result.
It defaults to single results (false
.)
Syntax
var myContinuous = mySpeechRecognition.continuous; mySpeechRecognition.continuous = true;
Value
A Boolean
representing the current SpeechRecognition
's continuous status. true
means continuous, and false
means not continuous (single result each time.)
Examples
This code is excerpted from our Speech color changer example.
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; //recognition.continuous = false; recognition.lang = 'en-US'; recognition.interimResults = false; recognition.maxAlternatives = 1; ...
Note that continuous
currently isn't implemented on Gecko, and you just single results with each recognition. For now, you can roughly emulate continuous results by just running SpeechRecognition.start()
each time a result is detected, like this:
recognition.onresult = function(event) { ... recognition.start(); }
Specifications
Specification | Status | Comment |
---|---|---|
Web Speech API The definition of 'continuous' in that specification. |
Draft | Ā |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
continuous | Chrome
Full support
33
| Edge ? | Firefox No support No | IE No support No | Opera No support No | Safari No support No | WebView Android
Full support
Yes
| Chrome Android
Full support
Yes
| Firefox Android No support No | Opera Android No support No | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support Ā
- Full support
- No support Ā
- No support
- Compatibility unknown Ā
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- See implementation notes.
- See implementation notes.
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.
Firefox OS permissions
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"