Method modify

src/modifiers/memory-scroll.ts:34–60

(
    element: Element,
    _: ArgsFor<Signature>['positional'],
    { key }: ArgsFor<Signature>['named'],
  )

  }

  modify(
    element: Element,
    _: ArgsFor<Signature>['positional'],
    { key }: ArgsFor<Signature>['named'],
  ) {
    if (!this.#element) {
      this.#element = this.scrollingElement(element);
      let handler = () => {
        this.#remember(this.#lastKey);
      };
      let eventElement = this.eventElement(element);
      eventElement.addEventListener('scroll', handler);
      registerDestructor(this, () => {
        eventElement.removeEventListener('scroll', handler);
      });
    }
    if (!key) {
      throw new Error(
        'You must provide a key to memoryScroll like {{memoryScroll key="my-awesome-pane"}}.',
      );
    }
    if (key !== this.#lastKey) {
      this.#remember(this.#lastKey);
      this.#lastKey = key;
      this.#restore(key);
    }
  }
  #remember(key: string | number | undefined) {
    if (key && this.#element) {
      let position = this.#element.scrollTop;