Javascript添加事件侦听器以更改音量

Question

I am trying to save the volume of a playing music file in a cookie so when the page is reloaded, the volume the user chose last is maintained, rather than turning up super loud or whatever.

Here's my test code for the eventlistener:

var myAudio = document.getElementById("audio1");

myAudio.addEventListener('change',alert("Audio Volume Changed"),true};

However, it does not respond when I change the volume. I've searched and despite it being something I think is pretty practical, there's no information on it.

Answer 1

You're looking for the "volumechange" event.

var audio = document.getElementById('sample');

audio.addEventListener('volumechange', function() {
    console.log('changed.', arguments);
}, false);

I'm using the bubble phase(as opposed to capture) in this example.

http://jsfiddle.net/426E6/

http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#event-definitions