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<div class="entry-content">
<div class="entry-title roundTop">
<h1 class="jq-clearfix">.undelegate()</h1>
<div class="entry-meta jq-clearfix">
Categories:
<span class="category"><a href="http://api.jquery.com/category/events/" title="View all posts in Events">Events</a> > <a href="http://api.jquery.com/category/events/event-handler-attachment/" title="View all posts in Event Handler Attachment">Event Handler Attachment</a></span>
</div>
</div>
<div id="undelegate1" class="entry method">
<h2 class="jq-clearfix roundTop section-title">
<span class="name">.undelegate( )</span> <span class="returns">Returns: <a class="return" href="http://api.jquery.com/Types/#jQuery">jQuery</a></span>
</h2>
<div class="jq-box roundBottom entry-details">
<p class="desc"><strong>Description: </strong>Remove a handler from the event for all elements which match the current selector, based upon a specific set of root elements.</p>
<ul class="signatures">
<li class="signature" id="undelegate"><h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate()</h4></li>
<li class="signature" id="undelegate-selector-eventType">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate( selector, eventType )</h4>
<p class="arguement"><strong>selector</strong>A selector which will be used to filter the event results.</p>
<p class="arguement"><strong>eventType</strong>A string containing a JavaScript event type, such as "click" or "keydown"</p>
</li>
<li class="signature" id="undelegate-selector-eventType-handler">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate( selector, eventType, handler )</h4>
<p class="arguement"><strong>selector</strong>A selector which will be used to filter the event results.</p>
<p class="arguement"><strong>eventType</strong>A string containing a JavaScript event type, such as "click" or "keydown"</p>
<p class="arguement"><strong>handler</strong>A function to execute at the time the event is triggered.</p>
</li>
<li class="signature" id="undelegate-selector-events">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4.3/">1.4.3</a></span>.undelegate( selector, events )</h4>
<p class="arguement"><strong>selector</strong>A selector which will be used to filter the event results.</p>
<p class="arguement"><strong>events</strong>A map of one or more event types and previously bound functions to unbind from them.</p>
</li>
<li class="signature" id="undelegate-namespace">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.6/">1.6</a></span>.undelegate( namespace )</h4>
<p class="arguement"><strong>namespace</strong>A string containing a namespace to unbind all events from.</p>
</li>
</ul>
<div class="longdesc"><p>The <code>.undelegate()</code> method is a way of removing event handlers that have been bound using <a href="/delegate"><code>.delegate()</code></a>. <strong>As of jQuery 1.7</strong>, the <a href="http://api.jquery.com/on"><code>.on()</code></a> and <a href="http://api.jquery.com/off"><code>.off()</code></a> methods are preferred for attaching and removing event handlers.</p></div>
<h3>Examples:</h3>
<div class="entry-examples" id="entry-examples">
<div id="example-0">
<h4>Example: <span class="desc">Can bind and unbind events to the colored button.</span>
</h4>
<pre class="prettyprint"><code class="example demo-code"><!DOCTYPE html>
<html>
<head>
<style>
button { margin:5px; }
button#theone { color:red; background:yellow; }
</style>
<script src="http://code.jquery.com/jquery-1.7rc2.js"></script>
</head>
<body>
<button id="theone">Does nothing...</button>
<button id="bind">Bind Click</button>
<button id="unbind">Unbind Click</button>
<div style="display:none;">Click!</div>
<script>
function aClick() {
$("div").show().fadeOut("slow");
}
$("#bind").click(function () {
$("body").delegate("#theone", "click", aClick)
.find("#theone").text("Can Click!");
});
$("#unbind").click(function () {
$("body").undelegate("#theone", "click", aClick)
.find("#theone").text("Does nothing...");
});
</script>
</body>
</html></code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div>
<div id="example-1">
<h4>Example: <span class="desc">To unbind all delegated events from all paragraphs, write:</span>
</h4>
<pre class="prettyprint"><code class="example">$("p").undelegate()</code></pre>
</div>
<div id="example-2">
<h4>Example: <span class="desc">To unbind all delegated click events from all paragraphs, write:</span>
</h4>
<pre class="prettyprint"><code class="example">$("p").undelegate( "click" )</code></pre>
</div>
<div id="example-3">
<h4>Example: <span class="desc">To undelegate just one previously bound handler, pass the function in as the third argument:</span>
</h4>
<pre class="prettyprint"><code class="example">var foo = function () {
// code to handle some kind of event
};
// ... now foo will be called when paragraphs are clicked ...
$("body").delegate("p", "click", foo);
// ... foo will no longer be called.
$("body").undelegate("p", "click", foo); </code></pre>
</div>
<div id="example-4">
<h4>Example: <span class="desc">To unbind all delegated events by their namespace:</span>
</h4>
<pre class="prettyprint"><code class="example">var foo = function () {
// code to handle some kind of event
};
// delegate events under the ".whatever" namespace
$("form").delegate(":button", "click.whatever", foo);
$("form").delegate("input[type='text']", "keypress.whatever", foo);
// unbind all events delegated under the ".whatever" namespace
$("form").undelegate(".whatever");</code></pre>
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