const txt = `Watch me as I get typed out before your very eyes using JavaScript's setInterval() function.`;
const outputEl = document.getElementById('target-element');
const speed = 50;

// Keeps track of character being typed:
let i = 0;

// Types a new character every 50 milliseconds to outputEl
const timerId = setInterval(() => {
    outputEl.innerHTML += txt.charAt(i);
    i++;
    if (i === txt.length) {
      clearInterval(timerId);
    }
  },speed);