Answers for "js number is not a number"

javascript check if variable is number

function isNumber(n) {
  return !isNaN(parseFloat(n)) && !isNaN(n - 0);
}

how to check if a number is a whole number in javascript

// how to check if a number is a whole number in javascript
console.log(Number.isInteger(123)); // true
console.log(Number.isInteger(123.123)); // false