socket.ref()

• 返回: <dgram.Socket>

默认情况下，只要套接字处于打开状态，则绑定套接字将导致它阻止 Node.js 进程退出。 socket.unref() 方法可用于从保持 Node.js 进程处于活动状态的引用计数中排除套接字。 socket.ref() 方法将套接字添加回引用计数并恢复默认行为。

多次调用 socket.ref() 不会有额外的效果。

socket.ref() 方法返回对套接字的引用，因此可以链接调用。

• Returns: <dgram.Socket>

By default, binding a socket will cause it to block the Node.js process from exiting as long as the socket is open. The socket.unref() method can be used to exclude the socket from the reference counting that keeps the Node.js process active. The socket.ref() method adds the socket back to the reference counting and restores the default behavior.

Calling socket.ref() multiples times will have no additional effect.

The socket.ref() method returns a reference to the socket so calls can be chained.