Question

我正在浏览下面从http://backbonejs.org/backbone.js

复制的Backbone.js源代码

(function(root, factory) {

  // Set up Backbone appropriately for the environment. Start with AMD.
  if (typeof define === 'function' && define.amd) {
    define(['underscore', 'jquery', 'exports'], function(_, $, exports) {
      // Export global even in AMD case in case this script is loaded with
      // others that may still expect a global Backbone.
      root.Backbone = factory(root, exports, _, $);
    });

  // Next for Node.js or CommonJS. jQuery may not be needed as a module.
  } else if (typeof exports !== 'undefined') {
    var _ = require('underscore');
    factory(root, exports, _);

  // Finally, as a browser global.
  } else {
    root.Backbone = factory(root, {}, root._, (root.jQuery || root.Zepto || root.ender || root.$));
  }

}(this, function(root, Backbone, _, $) {

  // Initial Setup
  // -------------

  // Save the previous value of the `Backbone` variable, so that it can be
  // restored later on, if `noConflict` is used.
  var previousBackbone = root.Backbone;

  // Create local references to array methods we'll want to use later.
  var array = [];
  var push = array.push;
  var slice = array.slice;
  var splice = array.splice;

  // Current version of the library. Keep in sync with `package.json`.
  Backbone.VERSION = '1.1.2';

  // For Backbone's purposes, jQuery, Zepto, Ender, or My Library (kidding) owns
  // the `$` variable.
  Backbone.$ = $;

在CommonJS / node.js配置中，它显示Next for Node.js or CommonJS. jQuery may not be needed as a module.并使用jquery的第四个factory(root, exports, _)参数调用$作为未定义。在工厂函数中，它Backbone.$ = $，因此Backbone.$将是未定义的？那么不会有很多东西（AJAX，$el包装等）破坏？

Answer 1

使用jQuery的主要原因是使用DOM操作，这在后端（nodejs）中是无用的，因此不需要将其作为依赖项加载。要解决此问题，您可以创建一个使用jQuery返回BackboneJS的简单模块。

// libs/backbone.js
var backbone = require("backbone");
backbone.$ = require("jquery");
module.exports = backbone;

Backbone。$如何在CommonJS模块配置中设置？

1 个答案: