Webpack分块。没有内容出现 - 没有加载块

时间:2018-01-16 12:10:10

标签: javascript reactjs webpack chunks chunking

这是我试图解决这个烦人的一天,但我确定,这个问题很简单。 我正在尝试将 bundle.js 划分为块以优化网站加载时间。

这是我的 webpack.config 文件:

module.exports = {
devServer: {
historyApiFallback: true
},
entry: {
index: ["./src/index.js"],
vendor: [
  "react",
  "react-dom",
  "react-redux",
  "react-router",
  "react-router-dom",
  "redux"
]
},
output: {
path: __dirname + '/public/views',
filename: "[name].js",
publicPath: "/views/"
},
module: {
loaders: [
  {
    test: /\.js$/,
    loader: "babel-loader",
    exclude: [/node_modules/, /pdfmake.js$/]
  },
  {
    test: /\.json$/,
    loader: "json-loader"
  }
]
},
plugins: [
new webpack.optimize.CommonsChunkPlugin({
  name: "vendor",
  filename: "vendor.js",
  minChunks: Infinity
}),
new webpack.optimize.CommonsChunkPlugin({
  name: "meta",
  chunks: ["vendor"],
  filename: "meta.js"
}),
new webpack.NamedModulesPlugin(),
new HtmlWebpackPlugin({
  title: "Deals",
  filename:  __dirname + "/views/index.ejs",
  template: __dirname + "/views/template.ejs",
  inject: false
}),
new PreloadWebpackPlugin({
  rel: "preload",
  as: "script",
  include: "all"
}),
new webpack.optimize.OccurrenceOrderPlugin(),
]
};

这是我的简化 index.ejs ,通过运行webpack代码创建的文件,来自template.ejs的结果:

<!DOCTYPE html>
<html lang="en">

<head>

    <link href="/pace.css" rel="stylesheet" />
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=yes">
    <meta charset="utf-8">
    <link rel="stylesheet" href="/style.css">
    <link rel="canonical" href="http://verygoodprof.fr/" />
    <link rel="preload" as="script" href="/views/index.js">
    <link rel="preload" as="script" href="/views/vendor.js">
    <link rel="preload" as="script" href="/views/meta.js">
</head>

<body>

    <noscript>
        <a href="http://enable-javascript.com/">Javascript must me enabled to use this site.</a>
    </noscript>

    <div class="text-center root" id="root">

    </div>

</body>

</html>

在这里,我看到我已经预先加载了动态编写的块,并且这些块位于正确的文件夹中,在运行webpack代码后创建。

这是我的 index.js 文件(React),声明是webpack.config文件中的索引条目

ReactDOM.render(
  <Provider store={createStoreWithMiddleware(reducers)}>
    <AppInit>
      <BrowserRouter>
        <div style={{ height: "100%" }}>
          <ProfRegisteringModal />
          <Switch>
            {/* <Route path="/inscription/:user" component={Registering} />
            <Route path="/inscription" component={Registering} />
            <Route path="/connexion" component={SigningIn} />
            <Route path="/equipe" component={TeamPres} />
            <Route path="/" component={AppContainer} /> */}
            <Route
              path="/inscription/:user"
              getComponent={(location, callback) => {
                require.ensure(
                  [],
                  function(require) {
                    callback(
                      null,
                      require("./components/registering/registering_landing_page.js")
                    );
                  },
                  "registerChunk"
                );
              }}
            />
            <Route
              path="/inscription"
              getComponent={(location, callback) => {
                require.ensure(
                  [],
                  function(require) {
                    callback(
                      null,
                      require("./components/registering/registering_landing_page.js")
                    );
                  },
                  "registerChunk"
                );
              }}
            />
            <Route
              path="/connexion"
              getComponent={(location, callback) => {
                require.ensure(
                  [],
                  function(require) {
                    callback(
                      null,
                      require("./containers/registering/signing_in.js")
                    );
                  },
                  "signinChunk"
                );
              }}
            />
            <Route
              path="/equipe"
              getComponent={(location, callback) => {
                require.ensure(
                  [],
                  function(require) {
                    callback(null, require("./components/team_pres.js"));
                  },
                  "teampresChunk"
                );
              }}
            />
            <Route
              path="/"
              getComponent={(location, callback) => {
                require.ensure(
                  [],
                  function(require) {
                    callback(null, require("./containers/app_container.js"));
                  },
                  "appContainerChunk"
                );
              }}
            />
          </Switch>
        </div>
      </BrowserRouter>
    </AppInit>
  </Provider>,
  document.querySelector(".root")
);

我注意到的第一件事是,应该构建的块是针对供应商 meta 正确构建的,但不适用于我的内部反应组件。但这不是主要问题,事实是,当在本地运行服务器时,我根本看不到我的反应应用程序。当我签入控制台时,index.ejs文件已正确加载。

当使用包含所有内容(无块)的简单bundle.js文件时,一切都运行良好。使用index.ejs将其指向

<script src="/views/bundle.js"></script>

非常感谢你的帮助!

修改

webpack.config 文件使其正常工作(归功于@margaretkru):

module.exports = {
  devServer: {
    historyApiFallback: true
  },
  entry: {
    app:"./src/index.js",
    vendor: [
      "axios",
      "jquery",
      "react",
      "react-dom",
      "react-redux",
      "react-router",
      "react-router-dom",
      "redux"
    ]
  },
  output: {
    path: __dirname + '/public/views',
    filename: "[name].js",
    publicPath: "/views/"
  },
  module: {
    loaders: [
      {
        test: /\.js$/,
        loader: "babel-loader",
        exclude: [/node_modules/, /pdfmake.js$/]
      },
      {
        test: /\.json$/,
        loader: "json-loader"
      }
    ]
  },
  plugins: [
    new webpack.NamedModulesPlugin(),
    new HtmlWebpackPlugin({
      filename:  __dirname + "/views/index.ejs",
      template: __dirname + "/views/template.ejs",
      inject: 'body',
      chunks: ['vendor', 'app'],
      chunksSortMode: 'manual'
    }),
    new PreloadWebpackPlugin({
      rel: "preload",
      include: ["vendor", "app"]
    }),
    new webpack.optimize.OccurrenceOrderPlugin(),
  ]
};new webpack.optimize.CommonsChunkPlugin({
      name: "vendor",
      minChunks: Infinity
    }),
    new webpack.NamedModulesPlugin(),
    new HtmlWebpackPlugin({
      filename:  __dirname + "/views/index.ejs",
      template: __dirname + "/views/template.ejs",
      inject: 'body',
      chunks: ['vendor', 'app'],
      chunksSortMode: 'manual'
    }),
    new PreloadWebpackPlugin({
      rel: "preload",
      include: ["vendor", "app"]
    }),
    new webpack.optimize.OccurrenceOrderPlugin(),
  ]
};

真正的问题不是加载的脚本排序,而是在“预加载”后我实际上没有加载脚本:HTMLWebpackPlugin的“inject”行有帮助,因为它注入了这两行:

<script src="/views/vendor.js"/> 
<script src="/views/app.js"/> 

在我的index.ejs正文

1 个答案:

答案 0 :(得分:3)

index.ejs中加载的脚本的顺序不正确。现在是:

<link rel="preload" as="script" href="/views/index.js">
<link rel="preload" as="script" href="/views/vendor.js">

这意味着您的index.js将在vendor.js之前加载,导致您的应用完全无法显示。首先应该加载所有应用程序的依赖项(vendor.js),然后才加载index.js,因为在执行自定义代码时需要存在依赖项。所以它应该是:

<link rel="preload" as="script" href="/views/vendor.js">
<link rel="preload" as="script" href="/views/index.js">

编辑:

正如我们最终想出的那样,问题不在于脚本的顺序,而是由于脚本实际上没有加载到html中。为此,他们需要在HtmlWebpackPlugin中添加为块并注入index.html

 new HtmlWebpackPlugin({
      title: "Deals",
      filename:  __dirname + "/views/index.ejs",
      template: __dirname + "/views/template.ejs",
      inject: 'body',
      chunks: ['vendor', 'index']
    })

此外,完全删除了块meta的配置。所有其余的配置(包括PreloadWebpackPlugin)都很好。