export function focusPrev(el: Element | null, self = false, scroll = true) {
    if (el == null) return;
    if (!self) el = el.previousElementSibling;
    if (el) {
        if (el.hasAttribute("tabindex")) {
            (el as HTMLElement).focus({
                preventScroll: !scroll,
            });
        } else {
            focusPrev(el.previousElementSibling, true);
        }
    }
}

export function focusNext(el: Element | null, self = false, scroll = true) {
    if (el == null) return;
    if (!self) el = el.nextElementSibling;
    if (el) {
        if (el.hasAttribute("tabindex")) {
            (el as HTMLElement).focus({
                preventScroll: !scroll,
            });
        } else {
            focusPrev(el.nextElementSibling, true);
        }
    }
}
