JSFiddle - React, Tailwind, and code Playground

HTML

<div id="zufaelligeNachricht"></div>

JavaScript

function randomInteger(max) {
	return Math.floor(Math.random() * max);
}

var arr = ["Hund", "Katze", "Maus"];
document.getElementById("zufaelligeNachricht").innerHTML=arr[randomInteger(arr.length)];