ObsoleteThis feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The emma
read-only property of the SpeechRecognitionEvent
interface returns an Extensible MultiModal Annotation markup language (EMMA) — XML — representation of the result.
Note: EMMA is defined in the specification EMMA: Extensible MultiModal Annotation markup language. You can see muliple EMMA examples in the spec.
Syntax
var myEmma = event.emma;
Value
A valid XML document. The exact contents can vary across user agents and recognition engines, but all supporting implementations will expose a valid XML document complete with an EMMA namespace. If the speech recognition system does not supply EMMA data then the user agent will return null
.
Examples
recognition.onresult = function(event) {
var color = event.results[0][0].transcript;
diagnostic.textContent = 'Result received: ' + color + '.';
bg.style.backgroundColor = color;
console.log(event.emma);
}
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome Full support 33 Full support 33 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 Full support ≤79 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 Full support Yes 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 Full support Yes 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 Full support Yes 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.
- Non-standard. Expect poor cross-browser support.'
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.'
- Deprecated. Not for use in new websites.
- 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
SpeechRecognitionEvent.emma by Mozilla Contributors is licensed under CC-BY-SA 2.5.