Checking jQuery event types

Let's say, jQuery has scroll event type. Is there a chance to det开发者_运维技巧ermine whether it's assigned an event handler?

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Yes.You can.

<input id="fname" type="text"  name="fname" />


$('#fname').change(function(){ alert('change!' );})

if (($.data( $('#fname').get(0), 'events' ).change).length>0)
{
    alert('You have "change" event handler assigned.');
}

Demo

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You can use event.type to check the event type.

http://api.jquery.com/event.type/