Determines whether an element is bound using jquery.

In some JS debugging that uses jquery, we may need to determine whether an element is bound to an event. If this element is bound using jquer, you can use the following method to check whether it is bound to an event.

VaR Tempe = $ ("# foo"). Data ("events ");
If (Tempe ){
If (Tempe ["click"]) {
// Your code
}
}

Principle: jquery caches events to prevent memory overflow and the speed of page unload. It also includes multiple function triggers and convenient management, for details, refer to this article.
Jquery will unmount all bound events during window. Unload to release the memory.

 

Well, if you use traditional event writing methods, such as <a onclick = "test ()">, you can only determine whether the element attribute exists in XXX.