JSFiddle - React, Tailwind, and code Playground

HTML

<div class="one">first div class</div>

CSS

.one, .two {
     margin: 5px 0;
    text-align: center;
    text-transform: capitalize;
}
.one { color: #f99;
}

.two { color: #eb9;
}

JavaScript

setTimeout(function () {
    
    $.when( $( ".one" ).delay(5000).fadeOut(1000) ).then(function () {
    });
}, 0);