webpack.config.js

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

module.exports = {
  mode: 'development',
  entry: path.resolve(__dirname, './src/index.js'),
  resolve: {
    extensions: ['.jsx', '.js'],
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
    clean: true,
  },
  devServer: {
    static: {
      publicPath: '/build',
      directory: path.resolve(__dirname, './build'),
    },
    host: 'localhost',
    port: 8080,
    open: true,
    hot: true,
    compress: true,
    historyApiFallback: true,
    headers: {
      'Access-Control-Allow-Origin': '*',
      'Access-Control-Allow-Methods': '*',
      'Access-Control-Allow-Headers': '*',
    },
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html',
      publicPath:'/'
    }),
  ],
  resolve: {
    extensions: ['.jsx', '.js'],
  },
};