JSFiddle - React, Tailwind, and code Playground

HTML

<button id="add">
+
</button>
<ul id="list">
</ul>

JavaScript

var add = document.getElementById('add');

add.addEventListener('click', function(e) {
	var newInput = document.createElement('input');
  var newListItem = document.createElement('li');
  newListItem.appendChild(newInput);
  var list = document.getElementById('list');
  list.appendChild(newListItem);
});