backbone.js - 事件，知道被点击的内容

Question

In one of my backbone.js view classes, I have something like:

...

events: {
  'click ul#perpage span' : 'perpage'
},

perpage: function() {
  // Access the text of the span that was clicked here
  // Something like: alert($(element).text())
},

...

because my per page markup might have something like:

<ul id="perpage">
  <li><span>5</span></li>
  <li><span>10</span></li>
</ul>

So how exactly can I find information about the element that caused the event? Or in this instance, that was clicked?

Answer 1

Normally on an event bind, you would just use $(this) , but I'm fairly sure Backbone views are set up so that this always refer to the view, so try this:

perpage: function(ev) {
   alert($(ev.target).text());
}

REALLY LATE EDIT : You probably want to use $(ev.currentTarget) . See dicussion on pawlik's answer below

Answer 2

ev.target可能会产生误导，你应该使用http://www.quirksmode.org/js/events_order.html上描述的ev.currentTarget

Answer 3

You can get any attribute you want. ev works as this :

perpage: function(ev) {
        console.log($(ev.target).attr('name'));
}