JAVASCRIPT

is_int js

/**
 * verifie si value est de type int
 * check if value is int
 * 
 * @return {boolean} 
 */
function isInt(value) {
    return !isNaN(value) && (function(x) { return (x | 0) === x; })(parseFloat(value))
  }

js is variable int

// The === operator is used for checking
// the value and the type of a variable

var data = 1;

if (data === parseInt(data, 10))
    alert("data is integer")
else
    alert("data is not an integer")