Web/API/SpeechRecognitionResultList

From Get docs

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.


The SpeechRecognitionResultList interface of the Web Speech API represents a list of SpeechRecognitionResult objects, or a single one if results are being captured in continuous mode.

Properties

SpeechRecognitionResultList.length Read only
Returns the length of the "array" — the number of SpeechRecognitionResult objects in the list.

Methods

SpeechRecognitionResultList.item
A standard getter that allows SpeechRecognitionResult objects in the list to be accessed via array syntax.

Examples

This code is excerpted from our Speech color changer example.

recognition.onresult = function(event) {
  // The SpeechRecognitionEvent results property returns a SpeechRecognitionResultList object
  // The SpeechRecognitionResultList object contains SpeechRecognitionResult objects.
  // It has a getter so it can be accessed like an array
  // The first [0] returns the SpeechRecognitionResult at position 0.
  // Each SpeechRecognitionResult object contains SpeechRecognitionAlternative objects that contain individual results.
  // These also have getters so they can be accessed like arrays.
  // The second [0] returns the SpeechRecognitionAlternative at position 0.
  // We then return the transcript property of the SpeechRecognitionAlternative object
  var color = event.results[0][0].transcript;
  diagnostic.textContent = 'Result received: ' + color + '.';
  bg.style.backgroundColor = color;
}

Specifications

Specification Status Comment
Web Speech APIThe definition of 'SpeechRecognitionResultList' in that specification. Draft  

Browser compatibility

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet

SpeechRecognitionResultList

Experimental'

Chrome Full support 33

Prefixed' Notes'

Full support 33

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Edge Full support ≤79

Prefixed' Notes'

Full support ≤79

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox

No support No

IE

No support No

Opera

No support No

Safari

No support No

WebView Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Chrome Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox Android

No support No

Opera Android

No support No

Safari iOS

No support No

Samsung Internet Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

item

Experimental'

Chrome Full support 33

Prefixed' Notes'

Full support 33

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Edge Full support ≤79

Prefixed' Notes'

Full support ≤79

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox

No support No

IE

No support No

Opera

No support No

Safari

No support No

WebView Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Chrome Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox Android

No support No

Opera Android

No support No

Safari iOS

No support No

Samsung Internet Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

length

Experimental'

Chrome Full support 33

Prefixed' Notes'

Full support 33

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Edge Full support ≤79

Prefixed' Notes'

Full support ≤79

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox

No support No

IE

No support No

Opera

No support No

Safari

No support No

WebView Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Chrome Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Firefox Android

No support No

Opera Android

No support No

Safari iOS

No support No

Samsung Internet Android Full support Yes

Prefixed' Notes'

Full support Yes

Prefixed' Notes'

Prefixed' Implemented with the vendor prefix: webkit Notes' You'll need to serve your code through a web server for recognition to work.

Legend

Full support  
Full support
No support  
No support
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"

See also