Spawn webworker with function or js code in string

spawn-webworker.es6

let spawn = (...args)  => {
    var src = args.map(function (x) {
        return typeof x === 'function' ? '((' + x.toString() + ').call(this));' : x;
    }).join(';');
    
    return new Worker(
        window.URL.createObjectURL(
            new Blob([src])
        )
    );
};