Can someone explain me the operators <<=, >>=, >>>=, AND, OR, XOR in javascript?

Question

I really don't get that of bits with this operators.

Answer 1

This is a wonderful course:
https://www.sololearn.com/learn/4070/?ref=app

a <<= b is the short form of a = a << b
a >>= b is the same as a = a >> b
And so on

Answer 2

Thank you!