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97 lines
No EOL
4.2 KiB
HTML
97 lines
No EOL
4.2 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head>
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<meta charset="utf-8" /><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div data-role="page">
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<div data-role="header">
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<h1>.undelegate()</h1>
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</div>
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<div data-role="content" data-theme="c" id="undelegate1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.undelegate( )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
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</h2>
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<div class=" entry-details">
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<p class="desc"><strong>Description: </strong>Remove a handler from the event for all elements which match the current selector, now or in the future, based upon a specific set of root elements.</p>
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<ul class="signatures">
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<li class="signature" id="undelegate"><h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate()</h4></li>
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<li class="signature" id="undelegate-selector-eventType">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate( selector, eventType )</h4>
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<p class="arguement"><strong>selector</strong>A selector which will be used to filter the event results.</p>
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<p class="arguement"><strong>eventType</strong>A string containing a JavaScript event type, such as "click" or "keydown"</p>
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</li>
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<li class="signature" id="undelegate-selector-eventType-handler">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4.2/">1.4.2</a></span>.undelegate( selector, eventType, handler )</h4>
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<p class="arguement"><strong>selector</strong>A selector which will be used to filter the event results.</p>
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<p class="arguement"><strong>eventType</strong>A string containing a JavaScript event type, such as "click" or "keydown"</p>
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<p class="arguement"><strong>handler</strong>A function to execute at the time the event is triggered.</p>
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</li>
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</ul>
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<div class="longdesc"><p>Undelegate is a way of removing event handlers that have been bound using <a href="/delegate">.delegate()</a>. It works virtually identically to <a href="/die">.die()</a> with the addition of a selector filter argument (which is required for delegation to work).</p></div>
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<h3>Examples:</h3>
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<div id="entry-examples" class="entry-examples">
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<div id="example-0">
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<h4>Example: <span class="desc">Can bind and unbind events to the colored button.</span>
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</h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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button { margin:5px; }
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button#theone { color:red; background:yellow; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<button id="theone">Does nothing...</button>
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<button id="bind">Bind Click</button>
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<button id="unbind">Unbind Click</button>
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<div style="display:none;">Click!</div>
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<script>
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function aClick() {
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$("div").show().fadeOut("slow");
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}
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$("#bind").click(function () {
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$("body").delegate("#theone", "click", aClick)
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.find("#theone").text("Can Click!");
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});
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$("#unbind").click(function () {
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$("body").undelegate("#theone", "click", aClick)
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.find("#theone").text("Does nothing...");
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});
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</script>
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</body>
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</html></code></pre>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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<div id="example-1">
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<h4>Example: <span class="desc">To unbind all delegated events from all paragraphs, write:</span>
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</h4>
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<pre><code class="example">$("p").undelegate()</code></pre>
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</div>
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<div id="example-2">
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<h4>Example: <span class="desc">To unbind all delegated click events from all paragraphs, write:</span>
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</h4>
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<pre><code class="example">$("p").undelegate( "click" )</code></pre>
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</div>
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<div id="example-3">
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<h4>Example: <span class="desc">To undelegate just one previously bound handler, pass the function in as the third argument:</span>
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</h4>
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<pre><code class="example">var foo = function () {
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// code to handle some kind of event
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};
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$("body").delegate("p", "click", foo); // ... now foo will be called when paragraphs are clicked ...
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$("body").undelegate("p", "click", foo); // ... foo will no longer be called.</code></pre>
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</div>
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</div>
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</div>
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</div>
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</div>
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</body></html> |