测试代码：
<body>
Duration: <span id="d"></span>
currentTime: <span id="c"></span>
<script>
var element_d = document.getElementById("d");
var element_c = document.getElementById("c");
var A = new Audio("test.mp3");
A.loop=true;
A.ondurationchange=function(){
element_d.innerHTML = A.duration;
}
A.ontimeupdate=function(t){
element_c.innerHTML = A.currentTime;
}
A.play();
</script>
</body>
Chromium M34上Audio API（HTMLMediaElement）播放音乐不能获取currentTime属性更新