Comparing Custom Strings(classes extending String class) using == [duplicate]

I was wondering, if there are any ways on how to compare 2 custom string objects which are instances of classes which extend String, using == doesn't work and it always returns false.

I have tried using valueOf but with no luck, the method gets never called if both operands are objects.

See an example below

class MyString extends String {
  doSomething(someData) {
    return doSomethingWithData(this, someData);
  };

  valueOf() {
    console.log('valueOf called');
    return this.toString();
  };
};

When doing console.log(new MyString('hi') == 'hi');, I Get

valueOf called
true

But When doing console.log(new MyString('hi') == new MyString('hi'));, I Get false.

So, the valueOf gets never called and the comparison blindly returns false, is there any possible way to fix it?