.undelegate()

Categories: Events > Event Handler Attachment

.undelegate()Returns: jQuery

Description: Remove a handler from the event for all elements which match the current selector, based upon a specific set of root elements.

The .undelegate() method is a way of removing event handlers that have been bound using .delegate(). As of jQuery 1.7, the .on() and .off() methods are preferred for attaching and removing event handlers.

Examples:

Can bind and unbind events to the colored button.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>undelegate demo</title>
  <style>
  button {
    margin: 5px;
  }
  button#theone {
    color: red;
    background: yellow;
  }
  </style>
  <script src="jquery-1.10.2.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>

Demo:

To unbind all delegated events from all paragraphs, write:

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$( "p" ).undelegate();

To unbind all delegated click events from all paragraphs, write:

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$( "p" ).undelegate( "click" );

To undelegate just one previously bound handler, pass the function in as the third argument:

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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 );

To unbind all delegated events by their namespace:

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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" );