JSFiddle - React, Tailwind, and code Playground

HTML

Описание:<br /> <textarea id='opis' type="text" cols="60" rows="6"/></textarea>
<br />
<span id='opis1'></span>

JavaScript

$("#opis").keyup(function () {
     var value = $(this).val();
     $("#opis1").text(value);
   }).keyup();