mmi-js/src/VoiceInput.js

Multi-Modal Input Library for voice, gesture, and traditional inputs.

class VoiceInput {
  constructor(eventBus) {
    this.eventBus = eventBus;
    const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
    if (SpeechRecognition) {
      this.recognition = new SpeechRecognition();
      this.recognition.continuous = true;
      this.recognition.onresult = this.handleResult.bind(this);
      this.recognition.start();
    } else {
      console.warn('Web Speech API not supported.');
    }
  }

  handleResult(event) {
    for (let i = event.resultIndex; i < event.results.length; ++i) {
      if (event.results[i].isFinal) {
        const transcript = event.results[i][0].transcript.trim();
        this.eventBus.emit('voice', { transcript });
      }
    }
  }
}

export default VoiceInput;