jQuery使用$ .on添加dom元素？

Question

I am a bit confused, I have a bunch of elements that get added via jquery using a ajax call and I want to attach a click handler to them (there could be a lot).

But I have no idea how to even begin this, I looked at .on and it is really confusing. I want to attach a click event handler for a certain class so that when I click on it, I get the this.id and then do stuff with it.

Answer 1

What you're trying to do is called event delegation.

You want to set the event listener on a higher element in the DOM that'll never change, but only fire off the event handler if the child element that has been clicked matches a specific selector.

Here's how it's done with jQuery's .on() :

$(document).on('click', '.your-selector', function(){
    alert(this.id);
});

---

PS You could probably apply the event listener to an element lower down in the DOM tree...

Answer 2

This will get you the id of a clicked element with the class "test"...

$(".test").on("click", function() {
    var id = $(this).attr("id")
});

You'll need to run that after the ajax call returns. It will only bind the click event to elements that exist when it runs, so it's no good at document.ready.