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SpeechRecognitionEvent.emma

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

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);
}

Specifications

Specification	Status	Comment
Web Speech API The definition of 'emma' in that specification.	Draft

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	33 Prefixed 33 Prefixed Prefixed Requires the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	?	No	No	No	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes Prefixed Yes Prefixed Prefixed Requires the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	Yes Prefixed Yes Prefixed Prefixed Requires the vendor prefix: webkit You'll need to serve your code through a web server for recognition to work.	?	No	No	No	?

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"

SpeechRecognitionEvent.emma

Syntax

Value

Examples

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Firefox OS permissions

See also