Edit in JSFiddle

$(function() {
  $('#WAButton').floatingWhatsApp({
    phone: '1231231231', //WhatsApp Business phone number International format-
    //Get it with Toky at https://toky.co/en/features/whatsapp.
    headerTitle: 'Chat with us on WhatsApp!', //Popup Title
    popupMessage: 'Hello, how can we help you?', //Popup Message
    showPopup: true, //Enables popup display
    buttonImage: '<img src="https://rawcdn.githack.com/rafaelbotazini/floating-whatsapp/3d18b26d5c7d430a1ab0b664f8ca6b69014aed68/whatsapp.svg" />', //Button Image
    //headerColor: 'crimson', //Custom header color
    //backgroundColor: 'crimson', //Custom background button color
    position: "right"    
  });
});
<!--Jquery-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<!--Floating WhatsApp css-->
<link rel="stylesheet" href="https://rawcdn.githack.com/rafaelbotazini/floating-whatsapp/3d18b26d5c7d430a1ab0b664f8ca6b69014aed68/floating-wpp.min.css">
<!--Floating WhatsApp javascript-->
<script type="text/javascript" src="https://rawcdn.githack.com/rafaelbotazini/floating-whatsapp/3d18b26d5c7d430a1ab0b664f8ca6b69014aed68/floating-wpp.min.js"></script>



<body>
<!--Div where the WhatsApp will be rendered-->
  <div id="WAButton"></div>
</body>
body {
  font-family: Arial, Helvetica, sans-serif;
}