worker.isConnected()

如果工作进程通过其 IPC 通道连接到其主进程，则此函数返回 true，否则返回 false。 工作进程在创建后连接到其主进程。 触发 'disconnect' 事件后断开连接。

This function returns true if the worker is connected to its primary via its IPC channel, false otherwise. A worker is connected to its primary after it has been created. It is disconnected after the 'disconnect' event is emitted.