number.isInteger is undefine code example

Example 1: javascript is number an integer

Number.isInteger(value)

//returns a Boolean

Example 2: 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")