一.创建项目并初始化
初始化：npm init -y (默认配置)
二.安装依赖
安装webpack依赖，bable依赖

npm install --save-dev babel-core babel-loader babel-plugin-import babel-preset-latest babel-preset-react babel-preset-stage-0 clean-webpack-plugin css-loader file-loader html-webpack-plugin node-sass sass-loader style-loader url-loader webpack webpack-cli webpack-dev-server

安装react相关依赖

npm install --save react react-dom react-router-dom

三.创建src，config文件以及indexl文件夹

image.png

config文件夹下各文件的配置
webpack.base.conf.js

'use strict'
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  // 入口起点
  entry: {
    app: './src/main.js',
  },
  // 输出
  output: {
    path: path.resolve(__dirname, '../dist'),
    filename: "[name].js",
  },
  // 解析
  resolve: {
    extensions: ['.ts', '.tsx', '.js', '.json']
  },
  // loader
  module: {
    rules: [
      {
        test: /\.js|jsx$/,
        exclude: /(node_modules|bower_components)/,// 屏蔽不需要处理的文件（文件夹）（可选）
        loader: 'babel-loader'
      }
    ]
  },
  // 插件
  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: 'body'
    })
  ]
};

webpack.dev.conf.js
先安装webpack-merge、uglifyjs-webpack-plugin依赖。webpack-merge是用于合并文件，UglifyJS Webpack Plugin插件用来缩小（压缩优化）js文件，至少需要Node v6.9.0和Webpack v4.0.0版本。
uglifyjs-webpack-plugin使用参考：https://www.jianshu.com/p/b597ea88b165

'use strict'
const {merge} = require('webpack-merge');
const baseWebpackConfig = require('./webpack.base.conf');

const path = require('path');
const webpack = require('webpack');

module.exports = merge(baseWebpackConfig, {
  // 模式
  mode: "development",
  // 调试工具
  devtool: 'inline-source-map',
  // 开发服务器
  devServer: {
    contentBase: false,// 默认webpack-dev-server会为根文件夹提供本地服务器，如果想为另外一个目录下的文件提供本地服务器，应该在这里设置其所在目录
    historyApiFallback: true,// 在开发单页应用时非常有用，它依赖于HTML5 history API，如果设置为true，所有的跳转将指向index.html
    compress: true,// 启用gzip压缩
    inline: true,// 设置为true，当源文件改变时会自动刷新页面
    hot: true,// 模块热更新，取决于HotModuleReplacementPlugin
    host: '127.0.0.1',// 设置默认监听域名，如果省略，默认为“localhost”
    port: 8703// 设置默认监听端口，如果省略，默认为“8080”
  },
  // 插件
  plugins: [
    // 热更新相关
    new webpack.NamedModulesPlugin(),
    new webpack.HotModuleReplacementPlugin()
  ],
  optimization: {
    nodeEnv: 'development',
  }
});

webpack.prod.conf.js

'use strict'
const {merge} = require('webpack-merge');
const baseWebpackConfig = require('./webpack.base.conf');

const path = require('path');
const webpack = require('webpack');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');

module.exports = merge(baseWebpackConfig, {
  // 模式
  mode: "production",
  // 调试工具
  devtool: '#source-map',
  // 输出
  output: {
    path: path.resolve(__dirname, '../dist'),
    filename: "js/[name].[chunkhash].js",
  },
  // 插件
  plugins: [
    new CleanWebpackPlugin(),
    new webpack.HashedModuleIdsPlugin(),
  ],
  // 代码分离相关
  optimization: {
    nodeEnv: 'production',
    minimizer: [new UglifyJSPlugin()],
    runtimeChunk: {
      name: 'manifest'
    },
    splitChunks: {
      minSize: 30000,
      minChunks: 1,
      maxAsyncRequests: 5,
      maxInitialRequests: 3,
      name: false,
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendor',
          chunks: 'initial',
        }
      }
    }
  }
});

配置完成之后执行npm run dev 命令。出现如下图片说明搭建成功

image.png

参考：https://blog.csdn.net/qq_26789867/article/details/90238015