webpack.config.js

/* eslint-disable no-undef */

const path = require('path');

module.exports = {
  mode: 'production',
  //如果有一個以上的檔案需要打包，可以傳陣列給entry
  entry: {
    index: ['./src/index.js', './stylesheet/index.css']
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, './dist'),
  },
  //將loader的設定寫在module的rules屬性中
  module: {
    //rules的值是一個陣列可以存放多個loader物件
    rules: [{
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-react', '@babel/preset-env']
          }
        }
      },
      {
        test: /\.css$/,
        use: [
          "style-loader",
          "css-loader"
        ]
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        use: [{
          loader: 'url-loader',
          options: {
            limit: 8192
          }
        }]
      },
      {
        test: /\.(ttf|eot|woff|woff2)$/,
        loader: 'file-loader',
        options: {
          name: 'fonts/[name].[ext]',
          publicPath: '/'
        },
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/i,
        loader: 'file-loader',
        options: {
          name: 'img/[name].[ext]',
          publicPath: '/'
        },
      },
    ]
  },
  optimization: {
    splitChunks: {
      cacheGroups: {
        vendor: {
          test: /node_modules/,
          name: 'vendor',
          chunks: 'initial',
          enforce: true
        }
      }
    }
  }
};