<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<audio id="a1" controls="controls" loop="loop">
<source src="music/Blue%20Sky%20Athletics.mp3">
</audio>
<script>
window.onload=function () {
let oA=document.querySelector("#a1");
let timer=null;
function autoPlay() {
if (oA.paused) {
//如果暂停
oA.paused=false;//设为不暂停
oA.volume=0.5;//设置自动播放的初始音量
oA.play();//调用play（）方法播放
}else {
//如果未暂停
clearInterval(timer);//清掉定时器
}
}
timer=setInterval(autoPlay,1);//用定时器触发autoplay自动播放
}
</script>
</body>
</html>
ctrl+cv即可使用。