webpack.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");

module.exports = {
  entry: './src/index.js',  // 入口
  output: { // 出口
    filename: 'bundle.[hash:8].js',
    path: path.resolve(__dirname, 'dist')
  },
  optimization: {              // 优化项
    minimizer: [
      new UglifyJsPlugin({     // 优化js
        cache: true,           // 是否缓存
        parallel: true,        // 是否并发打包
      }),
      new OptimizeCSSAssetsPlugin({})    // css 的优化
    ]
  },
  module: {
    rules: [
      {
        test: /\.(css|less)$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          'less-loader'
        ]
      },
      {
        test: /\.(js|jsx)$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env',
              '@babel/preset-react'
            ],
            plugins: [
              ["@babel/plugin-proposal-decorators", { "legacy": true }],
              ["@babel/plugin-proposal-class-properties", { "loose": true }]
            ]
          }
        },
        exclude: /node_modules/
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: {
          loader: 'url-loader',
          options: {
            limit: 200 * 1024,          // 小于200k变成base64
          }
        }
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './public/index.html',
      filename: 'index.html',
      hash: true, // 添加hash值解决缓存问题
      minify: { // 对打包的html模板进行压缩
        removeAttributeQuotes: true, // 删除属性双引号
        collapseWhitespace: true // 折叠空行变成一行
      }
    }),
    // 抽离css插件
    new MiniCssExtractPlugin({
      filename: '[name].[hash:8].css',
      chunkFilename: '[id].[hash:8].css',
    }),
    new webpack.BannerPlugin('tigerHee 2019')
  ]
}