webpack.config.js

const path = require('path');
const webpack = require('webpack');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
    mode: 'development',
    context: path.resolve(__dirname, 'src'),
    entry: {
        main: './index.js'
    },
    plugins: [
        new CopyWebpackPlugin([
            {
                from: path.resolve(__dirname, 'src', 'impulse'),
                to: 'impulse'
            },
            {
                from: path.resolve(__dirname, 'src', 'js', 'lib',
                    'webaudio-controls', 'knobs'),
                to: 'knobs'
            }
        ]),
        new CleanWebpackPlugin(['dist']),
        new HtmlWebpackPlugin(),
        new webpack.HashedModuleIdsPlugin(),
        new webpack.ProvidePlugin({
            $: 'jquery',
            jQuery: 'jquery',
            handlebars: 'handlebars'
        })
    ],
    optimization: {
        splitChunks: {
            cacheGroups: {
                commons: {
                    test: /[\\/]node_modules[\\/]/,
                    name: 'vendors',
                    chunks: 'all'
                }
            }
        }
    },
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: "[name].[chunkhash:8].js"
    },
    module: {
        rules: [
            {
                test: /\.(scss)$/,
                use: [{
                    loader: 'style-loader'
                }, {
                    loader: 'css-loader'
                }, {
                    loader: 'postcss-loader',
                    options: {
                        plugins: function () {
                            return [
                                require('precss'),
                                require('autoprefixer')
                            ];
                        }
                    }
                }, {
                    loader: 'sass-loader'
                }]
            },
            {
                test: /\.handlebars$/,
                loader: "handlebars-loader"
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                use: [
                    'file-loader'
                ]
            }
        ]
    }
}