事件：'close'
🌐 Event: 'close'
当观察者停止监听变化时触发。关闭的 <fs.FSWatcher> 对象在事件处理程序中不再可用。
🌐 Emitted when the watcher stops watching for changes. The closed <fs.FSWatcher> object is no longer usable in the event handler.
🌐 Event: 'close'
当观察者停止监听变化时触发。关闭的 <fs.FSWatcher> 对象在事件处理程序中不再可用。
🌐 Emitted when the watcher stops watching for changes. The closed <fs.FSWatcher> object is no longer usable in the event handler.