JSFiddle - React, Tailwind, and code Playground

HTML

<div id='br_notify_div' class='css_notify_div'>Hello World</div>

JavaScript

css_notify_div = {
    position: 'fixed',
    top: '2%',
    right: '2%',
    font: 'bold',
    fontSize: '1.5em',
    fontFamily: 'sans-serif',
    textAlign: 'center',
    backgroundColor: 'ffff88',
    border: '2px solid #eeee00',
    padding: '5px',
    margin: 'auto',
    display: 'none'
};

$('#br_notify_div').css(css_notify_div);

$('#br_notify_div').fadeIn("slow", function () {
    $('#br_notify_div').fadeOut(4000);
});