这样怎么样？

define(['jquery', 'underscore','backbone','text!templates/home/homeTemplate.html'], function($, _, Backbone, homeTemplate){

 var HomeView = Backbone.View.extend({
 el: $("#page"),

 events: {
    'click [data-toggle=offcanvas]' :'toggleClass'
 }, 

 render: function(){
    this.$el.html(homeTemplate);
 },

 toggleClass: function (e) {
this.$('.row-offcanvas').toggleClass('active');
 }

});

 return HomeView;

});

我删除offcanvas.js

$(document).ready(function() {
  $('[data-toggle=offcanvas]').click(function() {
    $('.row-offcanvas').toggleClass('active');
  });
});

然后把这行代码

$('[data-toggle=offcanvas]').click(function() {
        $('.row-offcanvas').toggleClass('active');
      });

到HomeView.js中

define([
  'jquery',
  'underscore',
  'backbone',
  'text!templates/home/homeTemplate.html'
], function($, _, Backbone, homeTemplate){

  var HomeView = Backbone.View.extend({
    el: $("#page"),

    render: function(){
      this.$el.html(homeTemplate);

                  $('[data-toggle=offcanvas]').click(function() {
                    $('.row-offcanvas').toggleClass('active');
                  });
    }

  });

  return HomeView;

});

而且效果很好。