​x
 
<!DOCTYPE html>
<html>
<body>
​
<video id="myVideo" width="640" height="360" controls>
  <source src="/i/video/shanghai.mp4" type="video/mp4">
  <source src="/i/video/shanghai.ogg" type="video/ogg">
  您的浏览器不支持 video 标签。
</video>
​
<p>单击该按钮可查看影片是否在准备就绪后立即自动开始播放。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myVideo").autoplay;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​