SteveP SteveP - 1 year ago 134
jQuery Question

jquery use of bind vs on click

I have come across several methods for handling click events in jquery:


$('#mydiv').bind('click', function() {


$('#mydiv').click(function() {


$('mydiv').on('click', function() {

Two questions:

  1. Are they any other ways of doing this?

  2. Which one should I use, and why ?


As eveyone has helpfully suggested, I should have read the docs better, and found out that I should use:

on() or click(),

which are effectively the same thing.

However, nobody has explained why bind is no longer recommended ? I'll probably get more downvotes for missing the obvious somewhere, but I can't find a reason for this in the documents.


'on' has the useful effect of being able to add event handlers to dynamically created elements. e.g.

$('body').on('click',".myclass",function() {
alert("Clicked On MyClass element");

This code adds a click handler to elements with a class of 'myClass'. However, if more myClass elements are then dynamically added later, they automatically get the click handler as well, without having to explicitly call 'on'. From what I understand people are saying, this is also more efficient (see Simons answer below).

Answer Source

From the documentation of bind and click :

bind :

As of jQuery 1.7, the .on() method is the preferred method for attaching event handlers to a document.

The source makes it clear there's no reason to use bind, as this function only calls the more flexible on function without even being shorter :

bind: function( types, data, fn ) {
    return this.on( types, null, data, fn );

So I'd suggest, just like the jQuery team, to forget the old bind function, which is now useless. It's only for compatibility with older code that it's still here.

click :

This method is a shortcut for .on('click', handler)

This shortcut is of course less powerful and flexible than the on function and doesn't allow delegation but it lets you write a shorter and, arguably, slightly more readable, code when it applies. Opinions diverge on that point : some developers argue that it should be avoided as it is just a shortcut, and there's also the fact that you need to replace it with on as soon as you use delegation, so why not directly use on to be more consistent ?

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