JSFiddle - React, Tailwind, and code Playground

by infous

HTML

<textarea rows="5" cols="20" maxlength="10"></textarea>
<div>10</div>

JavaScript

var LEN = 10;
$("textarea").change(ch);
$("textarea").keyup(ch);
function ch() {
    var o = $(this);
    var len = 10 - o.val().length;
    $("div").html(len);
}