JSFiddle - React, Tailwind, and code Playground

HTML

<div id="console"></div>

JavaScript

var console = document.getElementById("console");
console.innerHTML = "start";

var myApp = { hello: "HelloWorld" };
if (myApp.hello !== "HelloWorld" && myApp.hello !== "GoodbyeWorld"){
     console.innerHTML += "Standard check."   
}
if (myApp.hello !== ("HelloWorld" && "GoodbyeWorld")){
    console.innerHTML += "HelloWorld first.";
}
if (myApp.hello !== ("GoodbyeWorld" && "HelloWorld")){
    console.innerHTML += "GoodbyeWorld first.";
}