Is the double asterisk ** a valid JavaScript operator?

Question

I solved a kata on CodeWars and was looking through some of the other solutions when I came across the double asterisk to signify to the power of. I have done some research

Answer 1

Yes. ** is the exponentiation operator and is the equivalent of Math.pow.

It was introduced in ECMAScript 2016 (ES7).

For details, see the proposal and this chapter of Exploring ES2016.