how to check if a number is an integer in javacsript code example

Example 1: javascript is number an integer

Number.isInteger(value)

//returns a Boolean

Example 2: js check if string is integer

function isInt(str) {
  return !isNaN(str) && Number.isInteger(parseFloat(str));
}

Example 3: To check if a value is a number in JavaScript

const value = 2
isNaN(value) //false
isNaN('test') //true
isNaN({}) //true
isNaN(1.2) //false