Require.js bug random无法加载资源 [英] Require.js bug random Failed to load resource

问题描述

我的应用程序使用require.js，我有一个随机错误（50次重新加载时发生1次）
在控制台中写入Require.js：

My application use require.js, I have a random bug (happens 1 time for 50 reload) Require.js write in the console :

无法加载资源：服务器响应状态为404（未找到）

Failed to load resource: the server responded with a status of 404 (Not Found)

确实，需要.js尝试从错误的目录中包含jquery ...
我不知道为什么，大多数时候应用程序工作正常...

Indeed, require.js try to include jquery from a wrong directory... I don't know why, most of the time the application works fine...

我的配置非常简单：

require.config({
  shim: {
    underscore: {
      exports: '_'
    },
    backbone: {
      deps: ['underscore', 'jquery'],
      exports: 'Backbone'
    },
    animate_from_to: {
      deps: ['jquery']
    },
    bootstrap: {
      deps: ['jquery']
    },
    zoom: {
      deps: ['jquery']
    },
    shop_util: {
      deps: ['jquery']
    },
    pricer: {
      deps: ['jquery']
    },
    filter: {
      deps: ['jquery']
    },
    paginator: {
      deps: ['jquery']
    },
  },
  paths: {
    bootstrap:        'lib/bootstrap',
    jquery:           'lib/jquery-1.9.1',
    zoom:             'lib/jquery.zoom.min',
    animate_from_to:  'lib/jquery.animate_from_to-1.0.min',
    backbone:         'lib/backbone.min',
    underscore:       'lib/underscore.min',
    text:             'lib/require-text',
    shop_util:  'lib/shop_util',
    pricer:           'lib/pricer',
    filter:           'lib/filter',
    paginator:        'lib/paginator',
  }

});

谢谢

推荐答案

除了数据主脚本（js / main.js）之外，您的应用程序似乎还有另一个入口点。即使它是同一页面中的后续脚本，也不能依赖于在下一个脚本运行之前完成的数据主脚本，因为它加载了异步属性。

It seems you have another entry point into your application somewhere other than your data-main script (js/main.js). Even if it's a subsequent script in the same page, you cannot depend on your data-main script being completed before the next script runs, since it's loaded with async attribute.

<script data-main="js/main" src="js/lib/require.js"></script>
<!-- foo.js might run before js/main.js !!! -->
<script src="js/foo.js"></script>

您可以通过在js / main.js末尾添加console.log语句来证明这一点。一个在foo.js（或其他）。通常你会看到来自js / main.js然后是foo.js的那个，但是在50个案例中你会看到它们以其他顺序发生。

You can prove this by adding a console.log statement at the end of js/main.js and one in foo.js (or whatever). Normally you will see the one from js/main.js and then foo.js , but in that 1 out of 50 case you'll see them happen in the other order.

有几种策略可以解决这个问题：

There are several strategies to deal with this:

1 - 从数据主脚本中启动所有应用启动和后续要求

当然适用于单页应用程序。所有在一个文件中：

Applies to single-page apps, of course. All in one file:

require.config({
  // snip
});
require(['mymodule'], function( mymodule ) {
  // do stuff
});

2 - 在require.js脚本标记后面使用内联脚本

不要将上述脚本放在data-main引用的单独文件中，而是在下面放置第二个脚本标记。这是第一个在文档中列出的示例。

Instead of having the above script inside a separate file referenced by data-main, just have a 2nd script tag right below. This is the first example listed in the docs.

主要适用于单页应用

3 - 在require.js脚本标记之前将require config加载到全局变量中

第二个例子已列出在文档中。

<script>
    var require = {
        paths: { // define them}
        shim: { // define them }
    };
</script>
<script src="scripts/require.js"></script>

主要适用于单页应用

4 - 嵌入您的必需电话以首先加载配置

这最适合多页应用，并且是推荐的多页垫片应用示例

This works best for multi-page apps and is the one recommended in the multi-page shim app example

<script src="js/lib/require.js"></script>
<script>
    //Load common code that includes config, then load the app
    //logic for this page. Do the require calls here instead of
    //a separate file so after a build there are only 2 HTTP
    //requests instead of three.
    require(['./js/common'], function (common) {
        //js/common sets the baseUrl to be js/ so
        //can just ask for 'app/main1' here instead
        //of 'js/app/main1'
        require(['app/main1']);
    });
</script>

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