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SpeechRecognitionEvent.resultIndex

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

The resultIndex read-only property of the SpeechRecognitionEvent interface returns the lowest index value result in the SpeechRecognitionResultList "array" that has actually changed.

The SpeechRecognitionResultList object is not an array, but it has a getter that allows it to be accessed by array syntax.

Syntax

var myResultIndex = event.resultIndex;

Value

A number.

Examples

recognition.onresult = function(event) {
  var color = event.results[0][0].transcript;
  diagnostic.textContent = 'Result received: ' + color + '.';
  bg.style.backgroundColor = color;
  console.log(event.resultIndex); // returns 0 if there is only one result
}

Specifications

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"

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognitionEvent/resultIndex