https://www.ndt.nl/static/pages/js/effects/community-footer-reveal.d3dcfab5084f.js

1(function (window) {
2    "use strict";
3
4    var EFFECT_NAME = "community-footer-reveal";
5    var REVEALED_CLASS = "is-revealed";
6    var STAGGER_STEP_MS = 80;
7    var CONTENT_STAGGER_START_MS = 200;
8
9    function assignContentDelays(block) {
10        var items = block.querySelectorAll("[data-ndt-stagger-item]");
11        items.forEach(function (item, index) {
12            item.style.setProperty(
13                "--stagger-up-delay",
14                CONTENT_STAGGER_START_MS + index * STAGGER_STEP_MS + "ms"
15            );
16        });
17    }
18
19    function reveal(block) {
20        assignContentDelays(block);
21        block.classList.add(REVEALED_CLASS);
22    }
23
24    function initCommunityFooterReveal(motion) {
25        var blocks = document.querySelectorAll('[data-ndt-effect="' + EFFECT_NAME + '"]');
26        if (!blocks.length) {
27            return;
28        }
29
30        if (motion.prefersReducedMotion()) {
31            blocks.forEach(reveal);
32            return;
33        }
34
35        blocks.forEach(function (block) {
36            motion.observeWhenVisible(block, reveal, {
37                threshold: 0.2,
38                rootMargin: "0px 0px -5% 0px",
39            });
40        });
41    }
42
43    window.NDTEffects = window.NDTEffects || {};
44    window.NDTEffects[EFFECT_NAME] = initCommunityFooterReveal;
45})(window);