JSFiddle - React, Tailwind, and code Playground

by Gustavo Pinent

HTML

<div id="result"></div>

JavaScript

var result = "";
	var Teste = new Object();
	Teste.StringNew = new String();
	Teste.NumberNew = new Number();
	Teste.ArrayNew = new Array();
	Teste.StringLiteral = "";
	Teste.NumberLiteral = 0;
	Teste.ArrayLiteral = [];
	Teste.StringNull = String(null);
	Teste.NumberNull = Number(null);
	Teste.ArrayNull = [null];
	for (var i in Teste) {
	    if (Teste[i] == null) {
	        result += "<p>Type " + i + " is null: " + Teste[i] + "</p>";
	    } else {
	        result += "<p>Type " + i + " is not null: " + Teste[i] + "</p>";
	    }
	}
	document.getElementById("result").innerHTML = result;