a script that does speech recognition and creates notifications of the transcripts.

listenAndNotify.js

function createListener() {
  console.log('creating new listener');
  var recognition = new webkitSpeechRecognition();
  recognition.continuous = true;
  recognition.interimResults = true;
  var res = [];
  recognition.onresult = function(event) { 
    for (var i=0; i < event.results.length; i++) {
      var resultList = event.results[i];
      if (!resultList.isFinal) {
        continue;
      }
      for (var j=0; j < event.results[i].length; j++) {
        var message = event.results[i][j].transcript;
        if (res.indexOf(message) === -1){
          res.push(message);
          notifyMe(message);
        }
        
      }
    }
  };
  recognition.onend = createListener;
  recognition.start();
}
function notifyMe(message, timeout) {
  var n;
  // Let's check if the browser supports notifications
  if (!("Notification" in window)) {
    console.error("This browser does not support system notifications");
    return;
  }
  
  // Let's check whether notification permissions have already been granted
  else if (Notification.permission === "granted") {
    // If it's okay let's create a notification
    n = new Notification(message);
  }

  // Otherwise, we need to ask the user for permission
  else if (Notification.permission !== 'denied') {
    Notification.requestPermission(function (permission) {
      // If the user accepts, let's create a notification
      if (permission === "granted") {
        n = new Notification(message);
      }
    });
  }
  
  setTimeout(n.close.bind(n), timeout || 5000); 

  // Finally, if the user has denied notifications and you 
  // want to be respectful there is no need to bother them any more.
}
createListener();