dojo
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Dojo core is a powerful, lightweight library that makes common tasks quicker and easier. Animate elements, manipulate the DOM, and query with easy CSS syntax, all without sacrificing performance.
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HTML
<html>
<head>
<title>Dojo parent constraint test</title>
<style type="text/css">
@import "../../resources/dojo.css";
body {
padding: 1em;
}
.moveable {
background: #FFFFBF;
border: 1px solid black;
width: 300px;
padding: 10px 20px;
cursor: pointer;
}
.parent {
background: #BFECFF;
border: 10px solid lightblue;
width: 500px;
height: 500px;
padding: 10px;
margin: 10px;
}
</style>
<script type="text/javascript" src="../../dojo.js" data-dojo-config="isDebug: true"></script>
<script type="text/javascript">
require(["dojo/dnd/move", "dojo/domReady!"], function(move){
var m1, m2, m3, m4;
m1 = new move.parentConstrainedMoveable("moveable1", {area: "margin", within: true, delay: 20});
m2 = new move.parentConstrainedMoveable("moveable2", {area: "border", within: true});
m3 = new move.parentConstrainedMoveable("moveable3", {area: "padding", within: true});
m4 = new move.parentConstrainedMoveable("moveable4", {area: "content", within: true});
});
</script>
</head>
<body>
<h1>Dojo parent constraint test</h1>
<div class="parent" id="parent">
<div><strong>This is the parent element.</strong> All children will be restricted with <strong>within = true</strong>.</div>
<div class="moveable" id="moveable1">I am restricted within my parent's margins.</div>
<div class="moveable" id="moveable2">I am restricted within my parent's border.</div>
<div class="moveable" id="moveable3">I am restricted within my parent's paddings.</div>
<div class="moveable" id="moveable4">I am restricted within my parent's content.</div>
</div>
</body>
</html>