javascript - 获取 TypeError : this. options is undefined

Question

我正在尝试学习 BackboneJS，这是我遇到的错误。

我正在用 coffeescript 编码，这是生成的 JS 我不知道为什么会这样，因为我认为我做的是正确的。

(function() {
  var AppRouter, MenuItemDetails, app;

  MenuItemDetails = Backbone.View.extend({
    render: function() {
      var markup;
      markup = "<div>" + this.options.category + "</div>";
      this.$el.html(markup);
      return this;
    }
  });

  AppRouter = Backbone.Router.extend({
    routes: {
      "": "list",
      "menu-items/new": "itemForm",
      "menu-items/:item": "itemDetails"
    },
    list: function() {
      return $('#app').html('List Screen');
    },
    itemDetails: function(item) {
      var view;
      view = new MenuItemDetails({
        name: item,
        category: 'Entree',
        imagepath: 'no-image.jpg'
      });
      return $('#app').html(view.render().el);
    },
    itemForm: function() {
      return $('#app').html("New item form");
    }
  });

  app = new AppRouter();

  Backbone.history.start();

}).call(this);

/*
//@ sourceMappingURL=app.map
*/

我哪里错了？

Answer 1

尝试这样做:

  MenuItemDetails = Backbone.View.extend({
    initialize: function(options) {
      this.options = options;
    },
    render: function() {
      var markup;
      markup = "<div>" + this.options.category + "</div>";
      this.$el.html(markup);
      return this;
    }
  });