2.js

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2.js
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This example illustrates the binding of DOM events to View methods.

Working example: 2.html.

Go to Example 3

(function($){
  var ListView = Backbone.View.extend({
    el: 'body', // el attaches to existing element

events: Where DOM events are bound to View methods. Backbone doesn’t have a separate controller to handle such bindings; it all happens in a View.

    events: {
      'click button#add': 'addItem'
    },
    initialize: function(){
      _.bindAll(this, 'render', 'addItem'); // every function that uses 'this' as the current object should be in here

      this.counter = 0; // total number of items added thus far
      this.render();
    },

render() now introduces a button to add a new list item.

    render: function(){
      this.$el.append("<button id='add'>Add list item</button>");
      this.$el.append("<ul></ul>");
    },

addItem(): Custom function called via click event above.

    addItem: function(){
      this.counter++;
      $('ul', this.el).append("<li>hello world"+this.counter+"</li>");
    }
  });

  var listView = new ListView();
})(jQuery);

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