sw-notifications-module/webpack.config.js

const path = require('path');

module.exports = {
    entry: './src/safari-notifications.js',
    output: {
	filename: 'safari-notifications.js',
	path: path.resolve(__dirname, 'dist'),
	libraryTarget: 'self'
    },
    optimization: {
	splitChunks: {
	    chunks: 'async'
	}
    },
    mode: 'production',
    target: 'webworker',
    resolve: {
	fallback: {
	    "crypto": false // This might be needed if some module tries to access node's crypto, which is not available in browsers
	}
    }
};