JSFiddle - React, Tailwind, and code Playground
HTML
<div id="hideMsg">
The entry you posted not valid.
This Box will Close In <span>5</span> Seconds
</div>
JavaScript
$(function() {
var timer, counter = $("#hideMsg span").text();
$('#hideMsg').delay(counter * 1000).fadeOut('fast');
timer = setInterval(function() {
$("#hideMsg span").html(--counter);
if (counter == 0) { clearInterval(timer)};
}, 1000);
});