JSFiddle - React, Tailwind, and code Playground
HTML
<span id='changeText'>Fysioterapeut</span>
JavaScript
$( document ).ready(function() {
setInterval(change, 3000);
});
var counter = 0;
function change() {
var text = ["Fysioterapeut", "Kiropraktor", "Praktiserende læge"];
var elem = document.getElementById("changeText");
elem.innerHTML = text[counter];
counter++;
if(counter >= text.length) { counter = 0; }
}