SpeechRecognitionEvent.resultIndex

Experimental: 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

Specification
Web Speech API # dom-speechrecognitionevent-resultindex

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`resultIndex`	33	≤79	No	No	No	14.1	≤37	Yes	No	No	14.5	Yes