JSFiddle - React, Tailwind, and code Playground

by vaxilart

HTML

<textarea cols="30" rows="10"></textarea>

<br>
<button>1</button>
<button>2</button>
<button>3</button>

JavaScript

var buttons = document.querySelectorAll('button');
var textarea = document.querySelector('textarea');

for (var i=0; i < buttons.length; i++) {
    buttons[i].addEventListener('click', function() {
        textarea.innerHTML = i + 1;
    }, false);
}