The SpeechRecognitionAlternative
interface of the Web Speech API represents a single word that has been recognized by the speech recognition service.
The SpeechRecognitionAlternative
interface of the Web Speech API represents a single word that has been recognized by the speech recognition service.
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.
This code is excerpted from our Speech color changer example.
js
recognition.onresult = (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 const color = event.results[0][0].transcript; diagnostic.textContent = `Result received: ${color}.`; bg.style.backgroundColor = color; };
Specification |
---|
Web Speech API # speechreco-alternative |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
SpeechRecognitionAlternative |
33 | 79 | No | No | No | 14.1 | 4.4.3 | 33 | No | No | 14.5 | 2.0 |
confidence |
33 | 79 | No | No | No | 14.1 | 4.4.3 | 33 | No | No | 14.5 | 2.0 |
transcript |
33 | 79 | No | No | No | 14.1 | 4.4.3 | 33 | No | No | 14.5 | 2.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognitionAlternative