webpack the common module, based libraries, multiple public methods used singly detached, in order to reduce package size and packing time

1. html-webpack-externals-plugin widget

Installation html-webpack-externals-plugin

yarn add html-webpack-externals-plugin

Configuration webpack.config.js (page automatic introduction Once you've configured)

Demo CDN link 

const HtmlWebpackExternalsPlugin = require("html-webpack-externals-plugin");
module.exports = {
  plugins: [
    new HtmlWebpackExternalsPlugin({
      externals: [
        {
          module: "react",
          entry: "https://unpkg.com/react@16/umd/react.production.min.js",
          global: "React"
        },
        {
          module: "react-dom",
          entry:
            "https://unpkg.com/react-dom@16/umd/react-dom.production.min.js",
          global: "ReactDOM"
        }
      ]
    }),
  ],
};

After comparing pulled package

(Former detached)

After detached

2. Use webpack comes  SplitChunksPlugin plug-  split-chunks-plugin

module.exports = {
 optimization: {
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /(react|react-dom)/,
          name: "vendors",
          chunks: "all"
        }
      }
    }
  }
};

Packaging npm run build

You can see have been constructed out

The need to introduce the use of words in html template, but also to change the multi-entry mode

module.exports = {
  entry: {
    index: "./src/index.js" // 这里改成多入口
  },
  output: {
    path: path.join(__dirname, "dist"),
    filename: "[name]_[hash:8].js"
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, "index.html"),
      filename: "index.html",
      chunks: ["vendors", "index"] // 这里改成 chunks 引入
    }),
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /(react|react-dom)/,
          name: "vendors",
          chunks: "all"
        }
      }
    }
  },
};

Bale

3. Public method used repeatedly pulled out, still need to configure multiple entry

module.exports = {
  entry: {
    index: "./src/index.js"
  },
  output: {
    path: path.join(__dirname, "dist"),
    filename: "[name]_[hash:8].js"
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, "index.html"),
      filename: "index.html",
      chunks: ["commons", "index"]
    }),
  ],
  optimization: {
    splitChunks: {
      minSize: 0,
      cacheGroups: {
        commons: {
          name: "commons",
          chunks: "all",
          minChunks: 1 // 某个方法至少引用了两次，才会单独抽离
        }
      }
    }
  },
};