How to pass multiple values in one paramaeter?

Question

I want to write a function that takes an optional parameter(labeled parameters) and could have anywhere from 0 to infinite values. How do I pass this through into an executed function?

    if (parameters === undefined) {
        func();
    } else{
        console.log(parameters)
        func(parameters);
        console.log(func(parameters));
    }
    setTimeout(animate, delay, func, delay, parameters);
}```