https://pretius.com/wp-content/plugins/breakdance/subplugins/break…/breakdance-lazy-load.js?bd_ver=2.8.3

1(function () {
2  class BreakdanceLazyLoad {
3    constructor(element) {
4      this.element = element;
5      this.init();
6    }
7
8    init() {
9      if (this.element.getAttribute('data-bde-lazy-bg') === 'waiting') {
10        this.observer = new IntersectionObserver((entries, observer) => {
11          entries.forEach(entry => {
12            if (entry.isIntersecting) {
13              this.loadBackground();
14              observer.unobserve(entry.target);
15            }
16          });
17        });
18
19        this.observer.observe(this.element);
20      }
21    }
22
23    loadBackground() {
24      this.element.setAttribute('data-bde-lazy-bg', 'loaded');
25    }
26
27    destroy() {
28      if (this.observer) {
29        this.observer.unobserve(this.element);
30        this.observer = null;
31      }
32    }
33
34    static autoload(parent = null) {
35      const container = parent ?? document;
36      const selector = "[data-bde-lazy-bg]";
37      const elements = container.querySelectorAll(selector);
38
39      elements.forEach((element) => new this(element));
40    }
41  }
42
43  document.addEventListener("DOMContentLoaded", () =>
44    BreakdanceLazyLoad.autoload()
45  );
46
47  window.BreakdanceLazyLoad = BreakdanceLazyLoad;
48})();