WebSpeechDemo/index.html at master · gitmohamed/WebSpeechDemo · GitHub

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<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Web Speech API Tutorial</title>
  <style>
    body {
      font-family: monospace;
      font-size: 22px;
    }
  </style>
</head>
  <body>
    <span id="speech"></span>
    <span id="interim"></span>
  </body>
  <script>
    function upgrade() {
      alert('Please use Google Chrome for best experience');
    }

    window.onload = function() {
      if (!(window.webkitSpeechRecognition) && !(window.speechRecognition)) {
        upgrade();
      } else {
        var recognizing,
        transcription = document.getElementById('speech'),
        interim_span = document.getElementById('interim');

        interim_span.style.opacity = '0.5';


        function reset() {
          recognizing = false;
          interim_span.innerHTML = '';
          transcription.innerHTML = '';
          speech.start();
        }

        var speech = new webkitSpeechRecognition() || speechRecognition();

        speech.continuous = true;
        speech.interimResults = true;
        speech.lang = 'en-US'; // check google web speech example source for more lanuages
        speech.start(); //enables recognition on default

        speech.onstart = function() {
            // When recognition begins
            recognizing = true;
        };

        speech.onresult = function(event) {
          // When recognition produces result
          var interim_transcript = '';
          var final_transcript = '';

          // main for loop for final and interim results
          for (var i = event.resultIndex; i < event.results.length; ++i) {
            if (event.results[i].isFinal) {
              final_transcript += event.results[i][0].transcript;
            } else {
              interim_transcript += event.results[i][0].transcript;
            }
          }
          transcription.innerHTML = final_transcript;
          interim_span.innerHTML = interim_transcript;
        };

        speech.onerror = function(event) {
            // Either 'No-speech' or 'Network connection error'
            console.error(event.error);
        };

        speech.onend = function() {
            // When recognition ends
            reset();
        };

      }
    };
  </script>
</html>