webpack配置

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入口起点(entry point)

指示 webpack 应该使用哪个模块,来作为构建其内部 依赖图(dependency graph) 的开始。进入入口起点后,webpack 会找出有哪些模块和库是入口起点(直接和间接)依赖的。

module.exports = {
  entry: {
    app: './src/app.js',
    adminApp: './src/adminApp.js',
  },
};

输出(output)

output 属性告诉 webpack 在哪里输出它所创建的 bundle,以及如何命名这些文件。主要输出文件的默认值是 ./dist/main.js,其他生成文件默认放置在 ./dist 文件夹中

const path = require('path');
module.exports = {
  entry: './path/to/my/entry/file.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'my-first-webpack.bundle.js',
  },
};

loader:

webpack 只能理解 JavaScript 和 JSON 文件,这是 webpack 开箱可用的自带能力。loader 让 webpack 能够去处理其他类型的文件,并将它们转换为有效 模块,以供应用程序使用,以及被添加到依赖图中。

module.exports = {
  module: {
    rules: [
      {
        test: /.css$/,
        use: [
          { loader: 'style-loader' },
          {
            loader: 'css-loader',
            options: {
              modules: true,
            },
          },
          { loader: 'sass-loader' },
        ],
      },
    ],
  },
};

plugins:

plugins扩展了webpack的功能,在webpack运行时会广播很多事件,plugin可以监听这些事件,然后通过webpack提供的API来改变输出结果。

const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack'); // 访问内置的插件
const path = require('path');

module.exports = {
  entry: './path/to/my/entry/file.js',
  output: {
    filename: 'my-first-webpack.bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /.(js|jsx)$/,
        use: 'babel-loader',
      },
    ],
  },
  plugins: [
    new webpack.ProgressPlugin(),
    new HtmlWebpackPlugin({ template: './src/index.html' }),
  ],
};

DevServer

webpack-dev-server

module.exports = {
  devServer: {
    //`gzips` 压缩 `public/` 目录当中的所有内容并提供一个本地服务(serve)
    static: {
      directory: path.join(__dirname, 'public'),
    },
    compress: true,
    port: 9000,
    static: ['assets', 'css'],
    proxy: {
      '/api': 'http://localhost:3000',
    },

   historyApiFallback: {
      rewrites: [
        { from: /^/$/, to: '/views/landing.html' },
        { from: /^/subpage/, to: '/views/subpage.html' },
        { from: /./, to: '/views/404.html' },
      ],
    },

    // 浏览器 只显示错误信息
    client: {
      overlay: {
        errors: true,
        warnings: false,
      },
      // 编译百分比
      progress: true,
      //npx webpack serve --client-web-socket-transport ws --web-socket-server ws
      webSocketTransport: require.resolve('./CustomClient'),
    },
    webSocketServer: 'ws',
    https: {
      ca: './path/to/server.pem',
      pfx: './path/to/server.pfx',
      key: './path/to/server.key',
      cert: './path/to/server.crt',
      passphrase: 'webpack-dev-server',
      requestCert: true,
    },
  },
};

参考文档

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