/* white you custom css code here. only css code will work */
<!--JQuery-->  
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>  
<!--Floating WhatsApp css-->  
<link rel="stylesheet" href="floating-wpp.min.css">  
<!--Floating WhatsApp javascript-->  
<script type="text/javascript" src="floating-wpp.min.js"></script>