tryjsref_onprogress_dom 在线代码实例

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<!DOCTYPE html> 
<html> 
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body> 
<p>该实例演示了如何使用 HTML DOM 向 video 元素添加 "onprogress" 事件。</p>
<video controls id="myVideo">
    <source src="/statics/demosource/mov_bbb.mp4" type="video/mp4">
    <source src="/statics/demosource/mov_bbb.ogg" type="video/ogg">
    您的浏览器不支持 HTML5 video。
</video>
<script>
document.getElementById("myVideo").onprogress = function() {myFunction()};
function myFunction() {
    alert("正在下载视频");
}
</script>
</body> 
</html>
 
 
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运行结果
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