JS: Number.isFinite

Number.isFinite(number)

1. If Type of number is not number, return false.
2. If number is NaN or +Infinity or -Infinity, return false.
3. Else, return true.

console.log(Number.isFinite(3));
console.log(Number.isFinite(3.4));

console.log(Number.isFinite("3") === false);
console.log(Number.isFinite(Infinity) === false);
console.log(Number.isFinite(NaN) === false);