webpack.config.js

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

const dotenv = require('dotenv');

dotenv.config(); //환경 변수를 process.env 객체에 추가
module.exports = {
  mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
  // 시작점
  entry: {
    main: path.resolve(__dirname, 'src/index.js'),
  },
  // 웹팩 작업을 통해 생성된 결과물
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name][contenthash].js',
    clean: true,
    assetModuleFilename: '[name][ext]',
    publicPath: '/',
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /\.(png|svg|jpg|jpeg|gif)$/,
        type: 'asset/resource',
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
    }),
    new webpack.DefinePlugin({
      'process.env.API_KEY': JSON.stringify(process.env.API_KEY),
      'process.env.AUTH_DOMAIN': JSON.stringify(process.env.AUTH_DOMAIN),
      'process.env.PROJECT_ID': JSON.stringify(process.env.PROJECT_ID),
      'process.env.STORAGE_BUCKET': JSON.stringify(process.env.STORAGE_BUCKET),
      'process.env.MESSAGING_SENDER_ID': JSON.stringify(
        process.env.MESSAGING_SENDER_ID,
      ),
      'process.env.APPID': JSON.stringify(process.env.APPID),
      'process.env.MEASUREMENT_ID': JSON.stringify(process.env.MEASUREMENT_ID),
    }),
  ],
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist'),
    },
    compress: true,
    port: 3000,
    open: true,
    historyApiFallback: true,
    devMiddleware: {
      writeToDisk: true,
    },
  },
};