event.composedPath()

返回一个数组，其中包含当前 EventTarget 作为唯一条目，如果事件未被分发则返回空数组。这在 Node.js 中不使用，仅为完整性提供。

【Returns an array containing the current EventTarget as the only entry or empty if the event is not being dispatched. This is not used in Node.js and is provided purely for completeness.】