webpack.config.js

const path = require('path');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
    entry: {
        main: ['whatwg-fetch', './src/index.js']
    },
    mode: 'development',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'main.js'
    },
    module: {
        rules: [
            // {
            //     test: /\.js$/,
            //     exclude: /node_modules/,
            //     use: {
            //         loader: "babel-loader"
            //     }
            // },
            {
                test: /\.html$/,
                use: [{
                    loader: "html-loader",
                    options: {
                        minimize: true
                    }
                }]
            },
            {
                test: /\.css$/,
                use: [MiniCssExtractPlugin.loader, "css-loader"]
            }
        ]
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: "./src/index.html",
            filename: "./index.html"
        }),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[id].css"
        })
    ],
    devServer: {
        contentBase: [path.join(__dirname, 'index.html'), path.join(__dirname, 'main.css')],
        compress: true,
        port: 3000,
        watchContentBase: true,
        proxy: {
            '/': 'http://localhost:3000/',
            '/tasks': 'http://localhost:3000/tasks',
            '/tasks/add-task': 'http://localhost:3000/tasks/add-task'
        },
        historyApiFallback: true,
        watchOptions: { aggregateTimeout: 300, poll: 1000 },
        headers: {
            "Access-Control-Allow-Origin": "*",
            "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, PATCH, OPTIONS",
            "Access-Control-Allow-Headers": "X-Requested-With, content-type, Authorization"
        }
    }
};