How to determine whether an element is bound to an event in jquery

Jquery method to determine whether an element is bound to an event: [$(elem).data("events")[type]]. The parameter elem is a DOM object, and the parameter type represents the event type.

Environment:

This article applies to all brands of computers.

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To determine whether an event has been bound to an element, you can 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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