method

worker_threads.MessagePort.once

event: 'close',

listener: (ev: Event) => void

): this;

Node.js-specific extension to the EventTarget class that adds a once listener for the given event type. This is equivalent to calling on with the once option set to true.

once(

event: 'message',

listener: (value: any) => void

): this;

once(

event: 'messageerror',

listener: (error: Error) => void

): this;

once(

event: string,

listener: (arg: any) => void

): this;