ES7 Exponentiation Operator
The exponentiation (**) operator computes the value obtained by raising the first operand to the power of the second operand. It functions similarly to Math.pow(), but with the added capability of accepting BigInts as operands.
TypeScript fully supports this operator using as target in your tsconfig.json file es2016 or larger version.
console.log(2 ** (2 ** 2)); // 16