/**
 * Enumerate through all the descendants including self.
 * @param e Element
 */
export function *childrenIterator(e: Element) {
    e = e.firstElementChild as HTMLElement;
    if (!e) {
        return;
    }
    for(;;) {
        yield e as HTMLElement;
        e = e.nextElementSibling;
        if (!e) {
            return;
        }
    }
}


childrenIterator.find = (e: HTMLElement, fx: (element: HTMLElement) => boolean) => {
    for (const element of childrenIterator(e)) {
        if (fx(element)) {
            return element;
        }
    }
}