chrome/test/data/tab-restore-visibilty.html

   1 <script>
   2 var count = 0;
   3
   4 function setTitle() {
   5   // document.title reports the DOM page visibility and RAF count.
   6   document.title = document.visibilityState + ' ' + count++;
   7
   8   if (!window.ready)
   9     setTimeout(setReady, count > 10 ? 0 : 100);
  10 }
  11
  12 document.addEventListener('visibilitychange', setTitle);
  13
  14 (function changeTitle() {
  15   window.requestAnimationFrame(changeTitle);
  16   setTitle();
  17 })();
  18
  19 function setReady() {
  20   if (!window.ready)
  21     sendReady();
  22   window.ready = true;
  23 }
  24
  25 function sendReady() {
  26   if (window.domAutomationController) {
  27     domAutomationController.setAutomationId(1);
  28     domAutomationController.send("READY");
  29   }
  30 }
  31 </script>