如何判断HTML5音频元素是否正在使用Javascript播放 [英] How can I tell if an HTML5 Audio element is playing with Javascript
本文介绍了如何判断HTML5音频元素是否正在使用Javascript播放的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在网页中有一个audio元素，并且我想确保用户离开该页面时仍不在播放它. 如何确定在卸载页面时未播放audio元素?到目前为止，我有以下代码，但似乎不起作用；卸载时弹出的对话框报告playing是false，即使正在播放音频:
I have an audio element in a webpage, and I want to ensure that a user is not still playing it when they leave the page. How can I be sure the audio element is not playing when the page is unloaded? So far, I have the following code, but it doesn't seem to work; the dialog that pops up upon unload reports that playing is false even when the audio is playing:
<!DOCTYPE HTML><html>
<head>
<script><!-- Loading Scripts -->
function unloadTasks(){
if (playing && !window.confirm("A podcast is playing, and navigating away from this page will stop that. Are you sure you want to go?"))
window.alert("Here is where I will stop the page from unloading... somehow");
}
</script>
<script><!-- Player Scripts -->
var playing = false;
function logPlay(){
playing = isPlaying("e1audPlayer");
}
function isPlaying(player){
return document.getElementById(player).currentTime > 0 && !document.getElementById(player).paused && !document.getElementById(player).ended;
}
</script>
</head>
<body onunload="unloadTasks()">
<audio id="e1audPlayer" style="width:100%;" controls="controls" preload="auto" onplaying="logPlay()" onpause="logPlay()">
<source src="http://s.supuhstar.operaunite.com/s/content/pod/ADHD Episode 001.mp3" type="audio/mpeg"/>
<source src="http://s.supuhstar.operaunite.com/s/content/pod/ADHD Episode 001.ogg" type="audio/ogg"/>
Your browser does not support embedded audio players. Try <a href="http://opera.com/">Opera</a> or <a href="http://chrome.com/">Chrome</a>
</audio>
</body>
</html>
推荐答案
function isPlaying(playerId) {
var player = document.getElementById(playerId);
return !player.paused && !player.ended && 0 < player.currentTime;
}
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