https://wavremodelisme.com/modules/ph_scrolltotop//views/js/front.js

1/**
2 * Copyright ETS Software Technology Co., Ltd
3 *
4 * NOTICE OF LICENSE
5 *
6 * This file is not open source! Each license that you purchased is only available for 1 website only.
7 * If you want to use this file on more websites (or projects), you need to purchase additional licenses.
8 * You are not allowed to redistribute, resell, lease, license, sub-license or offer our resources to any third party.
9 *
10 * DISCLAIMER
11 *
12 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
13 * versions in the future.
14 *
15 * @author ETS Software Technology Co., Ltd
16 * @copyright  ETS Software Technology Co., Ltd
17 * @license    Valid for 1 website (or project) for each purchase of license
18 */
19$(document).ready(function (){
20    $(".back-to-top a").fadeOut();
21    $(".back-to-top a").click(function(e) {
22        e.preventDefault();
23        $("html, body").animate({ scrollTop: 0 }, parseInt(500));
24    });
25
26    if (ETS_SCROLL_PIXEL) {
27        $(window).scroll(function() {
28            if ($(this).scrollTop() > ETS_SCROLL_PIXEL) {
29                $('.back-to-top a').fadeIn();
30            } else {
31                $('.back-to-top a').fadeOut();
32            }
33        });
34    }
35});