动态项目和jQuery事件绑定

Question

I am currently populating a list dynamically based on some web calls. When these calls return I use an HTML template to add another item to the list based on the call response. I also am trying to attach some events to these objects using jQuery, but when I generate the items it seems like only the last item generated has the appropriate events firing.

So here is the code:

The javascript generates the html string and the adds it to the list:

List.innerHTML += html;

The html is generated using moustache.js and renders properly, I set the id in the template before adding it.

The template has this form:

var template = '<li style="width:400px; height:100px" id="{{id}}"  ><img src="{{source}}" style="float:left"/>{{title}} <button id="{{id}}button">Delete</button></li>';

Where all the elements are replaced appropriately.

Then I try to attach a click event to the button and a double click event to the entire list object:

$('#' +id +'button').bind('click', function() {
       //SOME STUFF GOES HERE
     });

$('#' +id +'button').bind('dblclick', function() {
     //MORE STUFF GOES HERE
     });

Im not sure why the event wouldnt attach to each object, am I missing something?

Thanks!

Answer 1

The DOM might not have been updated on the browser by the time you add the click handlers. You have a couple options:

1. Use delegated binding (using .on)
2. Attach the events before adding them to the DOM

Example 1:

$('body').on('click', '#' +id +'button', function () { /* foo */ });

Example 2:

$('#' +id +'button', myHtml).on('click', function () { /* foo */ });
List.append(myHtml);