Use Dom's hasClass method to test if the element has the class baz applied.

 

<!--
Software License Agreement (BSD License)
Copyright (c) 2009, Yahoo! Inc.
All rights reserved.

Redistribution and use of this software in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and the
      following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
    * Neither the name of Yahoo! Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission of Yahoo! Inc.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Sources of Intellectual Property Included in the YUI Library

YUI is issued by Yahoo! under the BSD license above. Below is a list of certain publicly available software that is the source of intellectual property in YUI, along with the licensing terms that pertain to thosesources of IP. This list is for informational purposes only and is not intended to represent an exhaustive list of third party contributions to the YUI.

    * Douglas Crockford's JSON parsing and stringifying methods: In the JSON Utility, Douglas Crockford's JSON parsing and stringifying methods are adapted from work published at JSON.org. The adapted work is in the public domain.
    * Robert Penner's animation-easing algorithms: In the Animation Utility, YUI makes use of Robert Penner's algorithms for easing.
    * Geoff Stearns's SWFObject: In the Charts Control and the Uploader versions through 2.7.0, YUI makes use of Geoff Stearns's SWFObject v1.5 for Flash Player detection and embedding. More information on SWFObject can be found here (http://blog.deconcept.com/swfobject/). SWFObject is (c) 2007 Geoff Stearns and is released under the MIT License (http://www.opensource.org/licenses/mit-license.php).
    * Diego Perini's IEContentLoaded technique: The Event Utility employs a technique developed by Diego Perini and licensed under GPL. YUI's use of this technique is included under our BSD license with the author's permission.

-->

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>


    <meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Using hasClass</title>

<style type="text/css">
/*margin and padding on body element
  can introduce errors in determining
  element position and are not recommended;
  we turn them off as a foundation for YUI
  CSS treatments. */
body {
  margin:0;
  padding:0;
}
</style>

<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>


<!--begin custom header content for this example-->
<style type="text/css">
#foo {
    margin-bottom:1em;
}
</style>

<!--end custom header content for this example-->

</head>

<body class=" yui-skin-sam">


<h1>Using hasClass</h1>

<div class="exampleIntro">
  <p>Clicking the button will use Dom's <code>hasClass</code> method to test if the element has the class <code>baz</code> applied.</p>

      
</div>

<!--BEGIN SOURCE CODE FOR EXAMPLE  -->

<div id="foo" class="bar baz">foo</div>
<button id="demo-run">run</button>

<script type="text/javascript">
(function() {
    var testClass = function(e) {
        alert(YAHOO.util.Dom.hasClass('foo', 'baz'));
    };

    YAHOO.util.Event.on('demo-run', 'click', testClass);

    YAHOO.log("The example has finished loading; as you interact with it, you'll see log messages appearing here.", "info", "example");

})();

</script>

<!--END SOURCE CODE FOR EXAMPLE  -->

</body>
</html>
<!-- presentbright.corp.yahoo.com uncompressed/chunked Thu Feb 19 10:53:13 PST 2009 -->

yui_2.7.0b.zip( 4,431 k)

Related examples in the same category

1.	Use Dom's getStyle method to get the background color of the red element and pass it to the setStyle method
2.	Use Dom's getXY method to get the position of the red element and pass it to the setXY method
3.	DOM API: get(id)
4.	DOM API: get(id, child id)
5.	DOM API: getAncestorByTagName('div', 'one')
6.	DOM API: getAncestorByClassName('listItem')
7.	DOM API: getChildren('demoList')
8.	DOM API: getElementsBy()
9.	DOM API: getElementsByClassName('specialItems')
10.	DOM API: getFirstChild('demoList')
11.	getLastChild('demoList')
12.	getNextSibling('one')
13.	getPreviousSibling('two')
14.	isAncestor('demo', 'one')
15.	insertBefore(li, 'one')
16.	insertAfter(li, 'one')
17.	Dynamically update table cell
18.	Use Dom's setStyle method to set the opacity of the element.
19.	Use Dom's setXY method to position the element to the click point.
20.	Use Dom's removeClass method to remove the class baz from the element.
21.	Using filter

Use Dom's hasClass method to test if the element has the class baz applied. : DOM « YUI Library « JavaScript DHTML

Related examples in the same category