JSFiddle - React, Tailwind, and code Playground

HTML

<button class="I">I</button>
<button class="O">O</button>

<input id="code" type="text" disabled />

JavaScript

$(document).ready(function(){
			$('.I').click(function(){
				$('#code').text($('#code').text()+"I");
			});
			$('.O').click(function(){
				$('#code').text($('#code').text()+"O");
			});
		});