JSFiddle - React, Tailwind, and code Playground

HTML

<div id="nav1">WOOHA WOOHA</div>
<div id="splat1">I GOT YOU ALL IN CHECK!</div>

CSS

#nav1 {background-color:red}
#splat1 {background-color:blue}

JavaScript

$("#nav1").hover(function(){
    $("#splat1").fadeToggle(2000);
},
    function(){
    $("#splat1").fadeToggle(500);
});