I am attempting to make a page that uses html5 audio to loop a sound file in the background and fade out as the user scrolls down. Ideally it would also fade in as the user scrolls back up. I know I am way off, but here is what I am working with:
html:
<html lang="en-US">
<head>
<style>article {height:1000px; background:yellow;}</style>
</head>
<body>
<article>
<audio loop id="soundTour" src="longdong.wav"></audio>
</article>
<script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js'></script>
</body>
</html>
jQuery:
$(document).ready(function() {
var audioElm = $('#soundTour').get(0);
audioElm.play();
audioElm.volume=1;
$(window).scroll(function () {
//audioElm.volume=.1;
var value = $(window).scroll("value");
audioElm.volume = (value / 100);
});
});
Anyone want to take a stab at this? Thanks!!!
You can use .scrollTop() to determine how far the user has scrolled:
$(document).ready(function() {
var audioElm = $('#soundTour').get(0);
audioElm.play();
var height = $(document).height() - $(window).height();
$(window).scroll(function() {
audioElm.volume = 1 - $(window).scrollTop() / height;
console.log(audioElm.volume);
});
});
来源：https://stackoverflow.com/questions/13965034/fade-html5-audio-adjust-volume-using-jquery-window-scroll