JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>
  <form>
      <input id="input" type="text" value="" />
      <input type = "button" id="button" value="Click" />
  </form>
</body>
</html>

JavaScript

var button = document.getElementById("button");
    var i = document.getElementById("input");
    var myArray = [];

    button.onclick = function alerted (){
      myArray.unshift(i.value);
      alert(myArray);
    };