Jquery method to determine whether an element is bound to an event: 1. The old version of the judgment statement [jQuery.data(elem, "events") [type]]; 2. [1.2.3] version can only be used after [$(elem).data("events")[type]].
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Jquery method to determine whether an element is bound to an event:
To determine whether an event has been bound to an element, use the following statement
jQuery.data(elem,"events")[type] //老版本也能用
$(elem).data("events")[type] //1.2.3以后才能用
Return value: an Object, which can be traversed using for in
, or undefined.
Parameters:
elem is a DOM object;
type is the event type.
Example:
Determine whether the click event is bound to the element with id foo
if( $("#foo").data("events")["click"] ){ //your code }
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