Create resizable area : Resizable « Ext JS « JavaScript DHTML

Create resizable area
  
<!--
/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
-->
<!-- Revised from demo code in ext3.0.0 -->

<html>
<head>
<title>Hello World Window</title>
<link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" />
<script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext-3.0.0/ext-all.js"></script>

<script language="javascript" >
/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
var ResizableExample = {
    init : function(){
        
        var basic = new Ext.Resizable('basic', {
                width: 200,
                height: 100,
                minWidth:100,
                minHeight:50
        });
        
        var animated = new Ext.Resizable('animated', {
                width: 200,
                pinned: true,
                height: 100,
                minWidth:100,
                minHeight:50,
                animate:true,
                easing: 'backIn',
                duration:.6
        });
        
        var wrapped = new Ext.Resizable('wrapped', {
            wrap:true,
            pinned:true,
            minWidth:50,
            minHeight: 50,
            preserveRatio: true
        });
        
        var transparent = new Ext.Resizable('transparent', {
            wrap:true,
            minWidth:50,
            minHeight: 50,
            preserveRatio: true,
            transparent:true
        });
        
        var custom = new Ext.Resizable('custom', {
            wrap:true,
            pinned:true,
            minWidth:50,
            minHeight: 50,
            preserveRatio: true,
            handles: 'all',
            draggable:true,
            dynamic:true
        });
        var customEl = custom.getEl();
        // move to the body to prevent overlap on my blog
        document.body.insertBefore(customEl.dom, document.body.firstChild);
        
        customEl.on('dblclick', function(){
            customEl.hide(true);
        });
        customEl.hide();
        
        Ext.get('showMe').on('click', function(){
            customEl.center();
            customEl.show(true);
        });
        
        var dwrapped = new Ext.Resizable('dwrapped', {
            wrap:true,
            pinned:true,
            width:450,
            height:150,
            minWidth:200,
            minHeight: 50,
            dynamic: true
        });
        
        var snap = new Ext.Resizable('snap', {
            pinned:true,
            width:250,
            height:100,
            handles: 'e',
            widthIncrement:50,
            minWidth: 50,
            dynamic: true
        });
    }
};

Ext.EventManager.onDocumentReady(ResizableExample.init, ResizableExample, true);
</script>

<style type="text/css">
#basic, #animated {
    border:1px solid #c3daf9;
    color:#1e4e8f;
    font:bold 14px tahoma,verdana,helvetica;
    text-align:center;
    padding-top:20px;
}
#snap {
    border:1px solid #c3daf9;
    overflow:hidden;
}
#custom {
    cursor:move;
}
#custom-rzwrap{
    z-index: 100;
}
#custom-rzwrap .x-resizable-handle{
    width:11px;
    height:11px;
    background:transparent url(ext-3.0.0/resources/images/default/sizer/square.gif) no-repeat;
    margin:0px;
}
#custom-rzwrap .x-resizable-handle-east, #custom-rzwrap .x-resizable-handle-west{
    top:45%;
}
#custom-rzwrap .x-resizable-handle-north, #custom-rzwrap .x-resizable-handle-south{
    left:45%;
}
</style>
</head>

<body>
<h1>Resizable Examples</h1>
<p>These examples show how to apply a floating (default) and pinned Resizable component to a standard element.</p>
<p>
    <b>Basic Example</b><br />
    This is a basic as you get. To resize the box, position your mouse anywhere near the bottom,
    right or border right edge of the box. This example uses the default "floating" handles.
</p>
<div id="basic">Resize Me!</div>
</body>
</html>
Related examples in the same category

1.	Wrap tag into a resizable area
2.	Animated Transitions resizable area
3.	Preserve Ratio resizable area
4.	Transparent Handles resizable area
5.	Customizable Handles resizable area
6.	Resizable also supports basic snapping in increments.