多重入口

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小牛编辑

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2023-12-01

Maybe you are building an application that has multiple urls. An example of this would be a solution where you have two, or more, different URLs responding with different pages. Maybe you have one user page and one admin page. They both share a lot of code, but you do not want to load all the admin stuff for normal users. That is a good scenario for using multiple entry points. A list of use cases could be:

你的应用可能有多个路径，就是应用中有两个或者多个 URL 相应不同的页面，这里就是提供这样的解决方案。可能你有一个普通用户页和一个管理员页，他们共享了很多代码，但是不想在普通用户页中加载所有管理员页的代码，所以好方案是使用多重入口。使用缘由有下面几条：

You have an application with multiple isolated user experiences, but they share a lot of code
You have a mobile version using less components
You have a typical user/admin application where you do not want to load all the admin code for a normal user

你的应用有多种不同的用户体验，但是他们共享了很多代码。
你有一个使用更少组件的手机版本
你的应用是典型的权限控制，你不想为普通用户加载所有管理用户的代码。

Let us create an example with a mobile experience using less components:

让我们创建一个使用更少组件的手机页面的例子：

webpack.production.config.js

var path = require('path');
var webpack = require('webpack');
var node_modules_dir = path.resolve(__dirname, 'node_modules');

var config = {
  entry: {
    app: path.resolve(__dirname, 'app/main.js'),
    mobile: path.resolve(__dirname, 'app/mobile.js'),
    vendors: ['react'] // 其他库
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js' // 注意我们使用了变量
  },
  module: {
    loaders: [{
      test: /\.js$/,
      exclude: [node_modules_dir],
      loader: 'babel'
    }]
  },
  plugins: [
    new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.js')
  ]
};

module.exports = config;

This configuration will create three files in the dist/ folder. app.js, mobile.js and vendors.js. Most of the code in the mobile.js file also exists in app.js, but that is what we want. We will never load app.js and mobile.js on the same page.

这个配置会在 dist/ 文件夹下创建三个文件：app.js、mobile.js和vendors.js，大部分的代码在mobile.js文件中，也有一部分在 app.js 中，不过这是我们需要的，我们不会在同一个页面中同时加载 app.js 和 mobile.js。