webpack.config.js

/* eslint-disable no-unused-vars */
const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  entry: [
    // entry point of our app
    './client/index.js',
  ],
  output: {
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/',
    filename: 'bundle.js',
  },
  devtool: 'eval-source-map',
  mode: process.env.NODE_ENV ,
  devServer: {
    compress: true,
    open: true,
    // enable HMR on the devServer
    hot: true,
    // fallback to root for other urls
    historyApiFallback: true,

    static: {
      // match the output path
      directory: path.resolve(__dirname, 'dist'),
      // match the output 'publicPath'
      publicPath: '/',
    },

    // headers: { 'Access-Control-Allow-Origin': '*' },
    /**
     * proxy is required in order to make api calls to
     * express server while using hot-reload webpack server
     * routes api fetch requests from localhost:8080/api/* (webpack dev server)
     * to localhost:3000/api/* (where our Express server is running)
     */
    proxy: {
      '/post/': {
        target: 'http://localhost:3000/',
        secure: false,
      },
      '/user/': {
        target: 'http://localhost:3000/',
        secure: false,
      },
      // '/styles.css/**': {
      //   target: 'http://localhost:3000/',
      //   secure: false,
      // },
    },
  },
  module: {
    rules: [
      {
        test: /.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env',
              '@babel/preset-react'
          ]
          }
        },
      },
      {
        test: /.(css|scss)$/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader'],
      }
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './index.html',
    }),
  ],
  resolve: {
    // Enable importing JS / JSX files without specifying their extension
    extensions: ['.js', '.jsx'],
  },
};