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

The SpeechRecognitionErrorEvent interface of the Web Speech API represents error messages from the recognition service.


SpeechRecognitionErrorEvent also inherits properties from its parent interface, Event.

SpeechRecognitionErrorEvent.error Read only
Returns the type of error raised.
SpeechRecognitionErrorEvent.message Read only
Returns a message describing the error in more detail.


var recognition = new SpeechRecognition();

recognition.onerror = function(event) {
  console.log('Speech recognition error detected: ' + event.error);
  console.log('Additional information: ' + event.message);


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

Browser compatibility

No compatibility data found. Please contribute data for "api.SpeechRecognitionErrorEvent" (depth: 1) to the MDN compatibility data repository.

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