使用requirejs&r.js优化器时无法加载jQuery插件

Question

我的requirejs优化器遇到了一些麻烦.运行优化器后,我在构建/编译文件中收到一些错误消息.在没有优化步骤的情况下运行我的Web应用程序时,我没有任何错误.

这是我的client.js文件(包含配置)(coffeescript)

requirejs.config
  baseUrl: '/source/'
  paths:
    text:                 'lib/text'
    io:                   'lib/socket.io'
    underscore:           'lib/underscore'
    backbone:             'lib/backbone'
    jquery:               'lib/jquery'
#    almond:               'lib/almond'
    bootstrap:            'lib/bootstrap'
    bootstrapFileUpload:  'lib/bootstrap-fileupload'
    jqueryUniform:        'lib/jquery.uniform'
    jqueryBrowser:        'lib/jquery.browser'
    datatables:           'lib/jquery.dataTables'
    datatables_bootstrap: 'lib/DT_bootstrap'
  shim:
    io:
      exports: 'io'
    jquery:
      exports: 'jQuery'
    jqueryBrowser:
      deps:    ['jquery']
    jqueryUniform:
      deps:    ['jqueryBrowser', 'jquery']
    underscore:
      exports: '_'
    backbone:
      deps:    ['underscore', 'jquery']
      exports: 'Backbone'
    datatables_bootstrap:
      deps:    ['jquery', 'datatables']
    datatables:
      deps:    ['jquery']


require ['routers/router', 'backbone'], (Router, Backbone) ->
  MainRouter = new Router()
  Backbone.history.start()

这是我的优化器配置.在将'requirejs'作为模块后,我从nodejs运行优化器.

  config =
    baseUrl: __dirname + '/../client/source'
    name:    'lib/almond'
    include: './client'
    optimize: 'none'
    out:     __dirname + '/../client/' + hash + '.js'
    paths:
      text:                 'lib/text'
      io:                   'lib/socket.io'
      underscore:           'lib/underscore'
      backbone:             'lib/backbone'
      jquery:               'lib/jquery'
      bootstrap:            'lib/bootstrap'
      bootstrapFileUpload:  'lib/bootstrap-fileupload'
      jqueryUniform:        'lib/jquery.uniform'
      jqueryBrowser:        'lib/jquery.browser'
      datatables:           'lib/jquery.dataTables'
      datatables_bootstrap: 'lib/DT_bootstrap'
    shim:
      bootstrap:
        exports: 'bootstrap'
      bootstrapFileUpload:
        exports: 'bootstrapUpload'
      io:
        exports: 'io'
      jquery:
        exports: 'jQuery'
      jqueryBrowser:
        deps:    ['jquery']
      jqueryUniform:
        deps:    ['jqueryBrowser', 'jquery']
      underscore:
        exports: '_'
      backbone:
        deps:    ['underscore', 'jquery']
        exports: 'Backbone'
      datatables:
        deps:    ['jquery']
      datatables_bootstrap:
        deps:    ['jquery', 'datatables']



  requirejs.optimize config, (buildResponse) ->
    js = true
    if js && css
      require './server'
  , (err) ->
    console.log 'requirejs err'
    console.log err

我在chrome中看到的具体错误是:"未捕获的TypeError:无法读取未定义的属性'默认值'"

这与此代码段相关:

/* Set the defaults for DataTables initialisation */
$.extend( true, $.fn.dataTable.defaults, {

知道可能出了什么问题吗？谢谢!

Answer 1

我遇到了同样的问题.我认为发生此错误的原因是因为DT_bootstrap.js它不是AMD模块,而是取决于一个的副作用.在这种情况下jquery.dataTables.js.

当RequireJS优化器将您引用的所有模块组合到一个大型JS文件中时,raw DT_bootstrap.js位于其中间的某个位置,有些位于之后jquery.dataTables.js.问题是DT_bootstrap.js在加载组合的js文件时立即评估.它希望$.fn.dataTable在遇到该行时被定义:

$.extend( true, $.fn.dataTable.defaults, {

由于jquery.dataTables.js是AMD模块,它已经编译但尚未评估.只有在以后需要作为依赖项的代码中才会对其进行评估,然后才会定义$.fn.dataTable.

我通过在AMD模块定义中包装'DT_bootstrap.js'来解决这个问题,就像在这里完成的那样:https://github.com/amdjs/backbone/blob/master/backbone.js#L8-L24

例如:

(function(root, factory) {
  // Set up DT_bootstrap appropriately for the environment.
  if (typeof define === 'function' && define.amd) {
    // AMD
    define(['jquery', 'datatables', 'bootstrap'], function($) {
      factory($);
    });
  } else {
    // Browser globals
    factory(root.jQuery);
  }
}(this, function($) {
    // <--- original DT_bootstrap.js goes here 
}));

它为我解决了这个问题.