Undelegate will not work when selector is class name.

[rosenkonstantinov@…]

It seems that as of jQuery 1.6.x undelegate will not work if selector is a class name. (this is working with 1.5.2) Tested on Chorme 12.0.742.122 and Firefox 5.0.

Sample repro  http://jsfiddle.net/njrNw/7/. Clicking on the button will not remove the previous delegate causing multiple executions of the click handler.

[timmywil]

If a selector is passed, so must an event type be passed.

 http://api.jquery.com/undelegate  http://jsfiddle.net/timmywil/njrNw/8/  http://jsfiddle.net/timmywil/njrNw/9/

[dmethvin]

OP, you are confusing HTML classes with jQuery event namespaces. This example with namespaces works fine.

 http://jsfiddle.net/dmethvin/njrNw/10/

[anonymous]

<p>
The new on() replacement for delegate also will not undelegate.
</p>

<div id="container">
        <button type="button" class="b">Click me twice</button>
</div>
function attach() {
    var $con = $("#container").on("click", ".b",
             function() {
                 console.log("click");
                 attach();
             }
        );
}    

attach();