Given the following elements:

<div class="container">
  <span class="some-class">content</span>
  ..n span repetitions..

Given the following .on()

$('.some-class').on('click', function () { ... });

If you redraw the .container with new span.some-class, will you leak the old events?

What I mean is, before the redraw, should you do:




1 Answer 1


If you attach your event listener like this:

    click: function () {
        // ...
}, '.some-class');

Then your event listener will not "leak" as you put it. You can redraw, add additional elements with .some-class and they will all inherit the event listener. This has the added benefit of only registering one event listener instead of "x" listeners depending on how many .some-class elements there are. Much better performance.

  • 1
    It also adds the benefit of not having to perform a dom lookup
    – Pinoniq
    Commented Jan 9, 2015 at 12:27

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