JSFiddle - React, Tailwind, and code Playground
HTML
<div id="nowOnline"></div>
JavaScript
var setRandomOnlineUsersCount = function(min, max) {
var usersCount = Math.floor(arguments.length > 1 ? (max - min + 1) * Math.random() + min : (min + 1) * Math.random());
document.getElementById("nowOnline").innerHTML = usersCount;
};
setInterval(setRandomOnlineUsersCount(200, 8000000), 1000);