ReadonlyconfidenceThe confidence read-only property of the SpeechRecognitionResult interface returns a numeric estimate of how confident the speech recognition system is that the recognition is correct.
ReadonlytranscriptThe transcript read-only property of the SpeechRecognitionResult interface returns a string containing the transcript of the recognized word(s).
The
SpeechRecognitionAlternativeinterface of the Web Speech API represents a single word that has been recognized by the speech recognition service. Available only in secure contexts.MDN Reference