Javascript Undefined Demo

by veer712

JavaScript

var params = {test:'test'};
var intlValue = params.intlValue;

if(intlValue === undefined){
  document.write("intlValue is undefined!");
  console.log("intlValue is undefined!");
}else{
	document.write("intlValue is not undefined!");
  console.log("intlValue is not undefined!");
}
document.write("<br>");
document.write(typeof "undefined");
document.write(typeof undefined);
console.log(typeof "undefined");
console.log(typeof undefined);