Returns true if the passed value is a finite number. Anything else, booleans, strings, objects, arrays, returns false:
Number.isFinite(1) //true
Number.isFinite(-237) //true
Number.isFinite(0) //true
Number.isFinite(0.2) //true
Number.isFinite('Flavio') //false
Number.isFinite(true) //false
Number.isFinite({}) //false
Number.isFinite([1, 2, 3]) //false
Download my free JavaScript Handbook!