JSFiddle - React, Tailwind, and code Playground
HTML
<h1>Exemplo setTimeout Recursivo</h1>
<div id="horas"></div>
CSS
#horas{
background-color:#eee;
color:#333;
font-size:20px;
font-family:Calibri;
}
JavaScript
(function getHours()
{
$('#horas').html((new Date).toLocaleString().substr(11))
setTimeout(getHours, 1000);
}());