webpack.config.js

const path = require('path')

module.exports = {
    target: 'web',
    entry: {
        app: ['./demo/index.jsx']
    },
    devServer: {
        contentBase: './demo/',
    },
    devtool: "eval-source-map",
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist'),
        publicPath: 'dist'
    },
    resolve: {
        extensions: ['.js', '.jsx', '.json']
    },
    module: {
        rules: [
            {
                test: /\.js[x]?$/,
                include: [
                    path.resolve(__dirname, 'src'),
                    path.resolve(__dirname, 'demo'),
                ],
                use: {
                    loader: 'babel-loader',
                },
            },
            {
                test: /\.css$/,
                use: ['style-loader', 'css-loader'],
            },
            {
                test: /\.scss$/,
                use: ['style-loader', 'css-loader', 'sass-loader'],
            },
            {
                test: /\.(png|jpg|svg|ttf|eot|woff|woff2)$/,
                use: ['file-loader'],
            },
        ],
    },
}