<script src="/js/jsjquery.ui.totop.js" type="text/javascript"></script>
<script src="/js/easing.js" type="text/javascript"></script>
<link rel="stylesheet" href="//cdn.materialdesignicons.com/3.5.95/css/materialdesignicons.min.css">
<a href="#" id="ui-to-top" class="ui-to-top active"></a>

.ui-to-top.active {
     transform: translateY(0);
}
@media (min-width: 480px) .ui-to-top {
     right: 40px;
     bottom: 40px;
}
.ui-to-top, .ui-to-top:active, .ui-to-top:focus {
     color: #fff;
     background-color: #ed1c94;
}
.ui-to-top {
     position: fixed;
     width: 50px;
     height: 50px;
     font-size: 20px;
     border-radius: 9px;
     right: 15px;
     bottom: 15px;
     overflow: hidden;
     text-align: center;
     text-decoration: none;
     z-index: 120;
     transition: .45s all ease-in-out;
     will-change: transform;
     transform: translateY(100px);
}
.ui-to-top:hover {
     color: #fff;
     background-color: #981df0;
     text-decoration: none;
}
.ui-to-top::before {
     content: '\f143';
     font-family: material design icons;
     line-height: 50px;
}

<script type="text/javascript">
$(document).ready(function() {

    $().UItoTop({
        easingType: 'easeOutQuart'
    });

});
</script>