@puzzleitc/puzzle-shell/dist/utils/dom.js

The standard design for Puzzle tools

export function isNodeOrChild(element, nodeName) {
    return (element &&
        element instanceof HTMLElement &&
        (element.nodeName.toLowerCase() === nodeName ||
            element.closest(nodeName) != null));
}
export function scrollIntoViewIfNeeded(target) {
    if (target.getBoundingClientRect().bottom > window.innerHeight) {
        target.scrollIntoView(false);
    }
    if (target.getBoundingClientRect().top < 0) {
        target.scrollIntoView();
    }
}