JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input type="submit">
</form>

JavaScript

var allWords = [
  'Hello',
  'No',
  'Hi',
  'Banana',
  'Apple'
]; 

function getRandomWord(words) {
  var randomIndex = Math.floor(Math.random() * words.length);
  return words[randomIndex];
}

document.querySelector("form").addEventListener("submit", function(e) {
  e.preventDefault();

  var fullWidth = window.innerWidth;
  var fullHeight = window.innerHeight;

  var elem = document.createElement("div");
  elem.textContent = getRandomWord(allWords);

  elem.style.position = "absolute";
  elem.style.left = Math.round(Math.random() * fullWidth) + "px";
  elem.style.top = Math.round(Math.random() * fullHeight) + "px";
  document.body.appendChild(elem);
});