webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require("html-webpack-plugin");
const htmlWebpackPlugin = new HtmlWebpackPlugin({
    template: path.join(__dirname, "./example/src/index.html"),
    filename: "./index.html"
});

module.exports = {
    entry: path.join(__dirname, "./example/src/app.js"),
    output: {
        path: path.join(__dirname, "example/dist"),
        filename: "bundle.js"
    },
    module: {
        rules: [
            {
                test: /\.(js|jsx)$/,
                use: "babel-loader",
                exclude: /node_modules/
            },
            {
                test: /\.s[ac]ss$/i,
                use: [
                    "style-loader",
                    "css-loader",
                    "sass-loader"
                ],
            },
        ],
    },
    plugins: [
        htmlWebpackPlugin
    ],
    resolve: {
        extensions: [".js", ".jsx", ".scss", ".css"]
    },
    devServer: {
        port: 3001
    }
};