​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>本例使用 addEventListener() 方法将 "waiting" 事件附加到 video 元素。</p>
​
<p>播放视频。</p>
​
<video controls id="myVideo">
  <source src="/i/photo/shanghai.mp4" type="video/mp4">
  Your browser does not support HTML5 video.
</video>
​
​
<script>
document.getElementById("myVideo").addEventListener("waiting", myFunction);
​
function myFunction() {
  alert("Wait! I need to buffer the next frame");
}
</script>
​
</body>
</html>
​