@alegendstale/holly-components/dist/node_modules/style-observer/src/rendered-observer.js

Reusable UI components created using lit

class c {
  /**
   * All currently observed targets
   * @type {WeakSet<Element>}
   */
  #e = /* @__PURE__ */ new Set();
  /**
   * Documents to IntersectionObserver instances
   * @type {WeakMap<Document, IntersectionObserver>}
   */
  #t = /* @__PURE__ */ new WeakMap();
  constructor(e) {
    this.callback = e;
  }
  /**
   * Begin observing the presence of an element.
   * @param {Element} element - The element to observe.
   */
  observe(e) {
    if (this.#e.has(e))
      return;
    let t = e.ownerDocument, s = this.#t.get(t);
    s || (s = new IntersectionObserver(
      (r) => {
        this.callback(r.map(({ target: o }) => ({ target: o })));
      },
      { root: t.documentElement }
    ), this.#t.set(t, s)), this.#e.add(e), s.observe(e);
  }
  /**
   * Stop observing the presence of an element.
   * @param {Element} [element] - The element to stop observing. If not provided, all targets will be unobserved.
   */
  unobserve(e) {
    if (!e) {
      for (const r of this.#e)
        this.unobserve(r);
      return;
    }
    let t = e.ownerDocument;
    this.#t.get(t)?.unobserve(e), this.#e.delete(e);
  }
}
export {
  c as default
};