One of the features that makes python such powerful language is that it allows for classes to act like built-in types through its magic methods. This allows for classes to be added together, to have specific behavior when iterated on, etc...
Example:
class Complex:
def __init__(self, re, im):
self.re = re
self.im = im
def __add__(self, other):
a = self.re + other.re
b = self.im + other.im
return Complex(a,b)
def __str__(self):
return '{} + {}i'.format(self.re, self.im)
print(Complex(1,2) + Complex(3,4))
# returns 4 + 6i
Implementing something similar in JS could make it much more powerful when it comes to scientific calculations.
Example of how this could be implemented:
class Complex{
constructor(re,im) {
this.re = re
this.im = im
}
operator add(arg) {
// code
}
}