code: function() {
  
        this.input = this.$("#new-todo");
        this.allCheckbox = this.$("#toggle-all")[0];
  
        this.listenTo(Todos, 'add', this.addOne);
        this.listenTo(Todos, 'reset', this.addAll);
        this.listenTo(Todos, 'all', this.render);
  
        this.footer = this.$('footer');
        this.main = $('#main');
  
        Todos.fetch();
      }
docs: At initialization we bind to the relevant events on the `Todos` collection, when items are added or changed. Kick things off by loading any preexisting todos that might be saved in *localStorage*.