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perfect-scrollbar/examples/options-autoupdate.html

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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>perfect-scrollbar example</title>
<link href="../dist/css/perfect-scrollbar.css" rel="stylesheet">
<script src="../dist/js/perfect-scrollbar.js"></script>
<style>
.contentHolder { position:relative; margin:0px auto; padding:0px; width: 80%; height: 400px; overflow: auto; }
.always-visible.contentHolder .content { background-image: url('./azusa.jpg'); width: 680px; height: 320px; }
.spacer { text-align:center }
.always-visible.ps-container > .ps-scrollbar-x-rail,
.always-visible.ps-container > .ps-scrollbar-y-rail {
opacity: 0.6;
}
</style>
</head>
<body>
<div id="Default" class="contentHolder always-visible">
<div id="Content" class="content">
</div>
</div>
<p style='text-align: center'>
<button onclick='addContent()'>Add new content!</button>
<button onclick='removeContent()'>Remove content!</button>
</p>
<script>
var i = 1;
var $ = document.querySelector.bind(document);
window.onload = function () {
Ps.initialize($('#Default'), {
autoupdate: true
});
};
var addContent = function () {
var newDiv = document.createElement('div');
newDiv.id = 'node' + i++;
var newContent = document.createTextNode('Hi there!');
newDiv.appendChild(newContent);
$('#Default').insertBefore(newDiv, $('#Content'));
};
var removeContent = function () {
if (i <= 1) return;
var node = $('#node' + --i);
node.parentNode.removeChild(node);
};
</script>
</body>
</html>