SpeechRecognitionResult

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

The SpeechRecognitionResult interface of the Web Speech API represents a single recognition match, which may contain multiple SpeechRecognitionAlternative objects.

Properties

SpeechRecognitionResult.isFinal Read only: A boolean value that states whether this result is final (true) or not (false) — if so, then this is the final time this result will be returned; if not, then this result is an interim result, and may be updated later on.
SpeechRecognitionResult.length Read only: Returns the length of the "array" — the number of SpeechRecognitionAlternative objects contained in the result (also referred to as "n-best alternatives".)

Methods

SpeechRecognitionResult.item: A standard getter that allows SpeechRecognitionAlternative objects within the result to be accessed via array syntax.

Examples

This code is excerpted from our Speech color changer example.

recognition.onresult = function(event) {
  // The SpeechRecognitionEvent results property returns a SpeechRecognitionResultList object
  // The SpeechRecognitionResultList object contains SpeechRecognitionResult objects.
  // It has a getter so it can be accessed like an array
  // The first [0] returns the SpeechRecognitionResult at position 0.
  // Each SpeechRecognitionResult object contains SpeechRecognitionAlternative objects
  // that contain individual results.
  // These also have getters so they can be accessed like arrays.
  // The second [0] returns the SpeechRecognitionAlternative at position 0.
  // We then return the transcript property of the SpeechRecognitionAlternative object
  var color = event.results[0][0].transcript;
  diagnostic.textContent = 'Result received: ' + color + '.';
  bg.style.backgroundColor = color;
}

Specifications

Specification
Web Speech API # speechreco-result

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
`SpeechRecognitionResult`	33	≤79	No	No	No	14.1	Yes	Yes	No	No	14.5	Yes
`isFinal`	33	≤79	No	No	No	14.1	Yes	Yes	No	No	14.5	Yes
`item`	33	≤79	No	No	No	14.1	Yes	Yes	No	No	14.5	Yes
`length`	33	≤79	No	No	No	14.1	Yes	Yes	No	No	14.5	Yes