JavaScript: 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 ) ); // true
console.log( Number.isFinite ( 3.4 ) ); // true

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