Travis CI Notifier - run from console on a build page and you'll see a notification when it's done

travisci_notifier.js

// Straight from MDN
function notifyMe(s) {
  // Let's check if the browser supports notifications
  if (!("Notification" in window)) {
    alert("This browser does not support desktop notification");
  }

  // Let's check whether notification permissions have already been granted
  else if (Notification.permission === "granted") {
    // If it's okay let's create a notification
    var notification = new Notification(s);
  }

  // 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") {
        var notification = new Notification(s);
      }
    });
  }

  // At last, if the user has denied notifications, and you
  // want to be respectful there is no need to bother them any more.
}

function checkit() {
  var classes = document.getElementsByClassName('build-status')[0].className;

  console.log('classes: ' + classes);

  if (!classes.match('started')) {
    notifyMe("Travis CI build finished");
  } else {
    setTimeout(checkit, 3000);
  }
}

checkit();