https://www.inlandpackaging.com/wp-content/themes/inland-2025-them…/back-to-top/back-to-top.js?ver=1753193795

1/* global window */
2(function (w) {
3    'use strict';
4
5    const
6
7        document = w.document,
8
9        debounce = (fn, delay) => {
10            let timer = null;
11            return function () {
12                const
13                    context = this,
14                    args = arguments
15                ;
16                w.clearTimeout(timer);
17                timer = w.setTimeout(
18                    () => {
19                        fn.apply(context, args);
20                    },
21                    delay
22                );
23            };
24        },
25
26        handleScroll = () => {
27            const pageOffset = document.documentElement.scrollTop || document.body.scrollTop;
28            document.querySelectorAll('#back-to-top-button').forEach((button) => {
29                button.classList.toggle('visible', pageOffset >= 100);
30            });
31        },
32
33        run = () => {
34            handleScroll();
35            w.addEventListener(
36                'scroll',
37                () => {
38                    debounce(
39                        () => {
40                            handleScroll();
41                        },
42                        100
43                    )();
44                }
45            );
46        },
47
48        init = () => {
49            if (['complete', 'interactive'].includes(document.readyState)) {
50                run();
51            } else {
52                document.addEventListener('DOMContentLoaded', run);
53            }
54        };
55    init();
56})(window);