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JavaScript jQuery Basics (2014) Creating a Simple Drawing Application Perform: Part 3

Ronnelle Torres
Ronnelle Torres
5,958 Points
Posted by Ronnelle Torres
Ronnelle Torres
5,958 Points

Why can't we use $(".controls li").on("click", function(){}) ?

Why can't we use $(".controls li").on("click", function(){}) ? I'm assuming that it's the same as $(".controls").on("click", "li", function(){});

On the API documentation, they used an example: 

$( "#dataTable tbody tr" ).on( "click", function() {
  console.log( $( this ).text() );
});

Please enlighten :)

2 Answers

Ayoub Nejjari
Ayoub Nejjari
10,877 Points
Ayoub Nejjari
Ayoub Nejjari
10,877 Points

Hey Ronnelle, if you look up the on() method in the documentation you will find that it has replaced the deprecated method delegate(), this means that they relatively do the same thing. So, basically they take the same arguments. If you look that up, you will find that you can use multiple events with the on() method, among with other specific arguments. so the main difference between on and click is that with .click() you are restricted to one event- the click event, but with .on() you can use multiple events and more importantly, it makes it easier in the future to change the event if you decided so.

I hope this helps! ^^

Craig Watson
Craig Watson
27,930 Points
Craig Watson
Craig Watson
27,930 Points

Hi Ronnelle,

To be honest I would just be using the .click( function() {}); syntax for click events.

Is this part of the lesson?

Craig

Ronnelle Torres
Ronnelle Torres
5,958 Points
Ronnelle Torres
Ronnelle Torres
5,958 Points

Yes. it's part of the lesson. It says $(".controls li").click(function(){}) will only bind on existing li inside the .controls. While using $(".controls").on("click", "li", function(){}); will allow us to bind the listener "click" on elements that is already existing inside the DOM and dynamically added elements.