jQuery: more than one handler for same event

Question

What happens if I bind two event handlers to the same event for the same element?

For example:

var elem = $(\"...\")
elem.click(...);
elem.click(...)         


        

Answer 1

Both handlers get called.

You may be thinking of inline event binding (eg "onclick=..."), where a big drawback is only one handler may be set for an event.

jQuery conforms to the DOM Level 2 event registration model:

The DOM Event Model allows registration of multiple event listeners on a single EventTarget. To achieve this, event listeners are no longer stored as attribute values

Answer 2

Suppose that you have two handlers, f and g, and want to make sure that they are executed in a known and fixed order, then just encapsulate them:

$("...").click(function(event){
  f(event);
  g(event);
});

In this way there is (from the perspective of jQuery) only one handler, which calls f and g in the specified order.