SpeechRecognitionAlternative

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The SpeechRecognitionAlternative interface of the Web Speech API represents a single word that has been recognized by the speech recognition service.

Instance properties

SpeechRecognitionAlternative.transcript Read only: Returns a string containing the transcript of the recognized word.
SpeechRecognitionAlternative.confidence Read only: Returns a numeric estimate between 0 and 1 of how confident the speech recognition system is that the recognition is correct.

Examples

This code is excerpted from our Speech color changer example.

recognition.onresult = (event) => {
  const color = event.results[0][0].transcript;
  diagnostic.textContent = `Result received: ${color}.`;
  bg.style.backgroundColor = color;
};