app/views/conferences/_footer.haml
.scroll-top-wrapper
= link_to "#banner", class: "smoothscroll" do
%i.fa-solid.fa-2x.fa-circle-arrow-up
:javascript
$(function(){
$(document).on( 'scroll', function(){
if ($(window).scrollTop() > 100) {
$('.scroll-top-wrapper').addClass('show');
} else {
$('.scroll-top-wrapper').removeClass('show');
}
});
});