Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我很困惑——我的 rootNode 有一个值,无论是 dom.html 还是 Document,但是 childElements 始终是未定义的。曾经回来的一切都是未定义的。
element[element]应该elements[element]在每次出现。
element[element]
elements[element]