ES6 class static method vs function

Question

I am using NodeJS and going to write some utility functions. I think of two options here.

The first one is the traditional approach, i.e.

module.exports = {
    random: () => Math.random(),
};

And the second option is to use ES6 class with static methods, e.g.

class MyMath {
    static random() {
        return Math.random();
    }
}
module.exports = MyMath;

From programming/unit testing's perspective which one is better? Or they are pretty much the same because ES6 class essentially is a syntactic sugar?

Update: Thanks for the people who commented. I saw those questions asking class static method v.s. instance method, or prototype methods v.s. object method but mine is more like class static method v.s. Object method.

Answer 1

Using static-only classes as namespaces in JavaScript is the remnant of languages where a class is the only available entity. Modules already act as namespaces.

In case singleton object is needed, object literal should be used:

module.exports = {
    random: () => Math.random(),
};

There's already exports object that can be used:

exports.random = () => Math.random();

Or with ES modules:

export const random = () => Math.random();

Answer 2

With the class syntax you might give more than you really intended, it is a constructor that can be invoked with new, while with the object literal syntax you give a non-function object. As that is really what you want to expose, go for that.