app/views/topics/index.js.erb
$(".list-options").replaceWith("<%= j render partial: 'list_header', locals: { challenge: @challenge, topics: @topics } %>");
$(".load-more").remove();
$("ul.list-topics").append("<%= j render partial: 'topics' %>");
$(".list-topics").last().after("<%= j render partial: 'shared/load_more', locals: { collection: @topics } %>");
$('html, body').animate({
scrollTop: $(document).height()-$(window).height()},
1400,
"easeOutQuint"
);