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SpeechRecognition.onnomatch

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

The onnomatch property of the SpeechRecognition interface represents an event handler that will run when the speech recognition service returns a final result with no significant recognition (when the nomatch event fires.)

This may involve some degree of recognition, which doesn't meet or exceed the confidence threshold.

Note: The onnomatch handler does not yet work properly in Firefox — the speech recognition system always returns a positive match, and then guesses at what item in the grammar it found. This is being worked on.

Syntax

mySpeechRecognition.onnomatch = function() { ... };

Examples

var recognition = new SpeechRecognition();

recognition.onnomatch = function() {
  console.log('Speech not recognised');
}

Specifications

Specification	Status	Comment
Web Speech API The definition of 'onnomatch' 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"

SpeechRecognition.onnomatch

Syntax

Examples

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Firefox OS permissions

See also