How to check if Number is Float in JS

Usually we check types in javascript by using typeOf method but javascript doesn't support float type so it return a Number when you check a type of float number.
Like: typeOf(4.56) = Number

How to check if number is float or not in JS:

   function isFloat(n){
      return Number(n) === n && n % 1 !== 0;
    }

Explanation:
If the mod of a number divided by 1 is not equal to zero then it must a float number.

Comments

[Justin Mitchell]

This doesn't validate if the specific type is a float. In fact, JS has no concept of floats, it only has the singular concept of number, so what you're really testing here is if the value is an whole number (int) or a decimal (double).

All JS numbers are doubles; 64 bit double precision floating point numbers.

[SaepulBahri]

in Javascript you can use this :

/[\.]/.test(String(120.5))