JSFiddle - React, Tailwind, and code Playground

HTML

<html>

  <body>
    <h1 id="wut">
    </h1>
    <h1 id="rll">
    </h1>
    :|
  </body>

</html>

JavaScript

let ad = "11" + 1;
document.getElementById("wut").innerHTML = ad;
ad = "11" - 1;
document.getElementById("rll").innerHTML = ad;