JavaScript使用Webpack打包前端项目

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

module.exports = (env, argv) => {
  const isProduction = argv.mode === 'production';

  return {
    entry: './src/index.js',
    output: {
      filename: isProduction ? '[name].[contenthash].js' : '[name].js',
      path: path.resolve(__dirname, 'dist'),
    },
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          use: {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env'],
            },
          },
        },
        {
          test: /\.css$/,
          use: [
            isProduction ? MiniCssExtractPlugin.loader : 'style-loader',
            'css-loader',
            'postcss-loader',
          ],
        },
        {
          test: /\.(png|svg|jpg|gif)$/,
          type: 'asset/resource',
        },
      ],
    },
    plugins: [
      new CleanWebpackPlugin(),
      new HtmlWebpackPlugin({
        template: './src/index.html',
      }),
      ...(isProduction
        ? [
            new MiniCssExtractPlugin({
              filename: '[name].[contenthash].css',
            }),
          ]
        : []),
    ],
    devServer: {
      static: {
        directory: path.join(__dirname, 'dist'),
      },
      hot: true,
    },
  };
};

npm install webpack webpack-cli webpack-dev-server --save-dev
npm install babel-loader @babel/core @babel/preset-env --save-dev
npm install css-loader style-loader postcss-loader mini-css-extract-plugin --save-dev
npm install html-webpack-plugin clean-webpack-plugin --save-dev

{
  "scripts": {
    "start": "webpack serve --mode development",
    "build": "webpack --mode production"
  }
}