worker.parentPort

• <null> | <MessagePort>

如果此线程是 Worker，则这是允许与父线程通信的 MessagePort。 使用 parentPort.postMessage() 发送的消息在使用 worker.on('message') 的父线程中可用，使用 worker.postMessage() 从父线程发送的消息在使用 parentPort.on('message') 的该线程中可用。

const { Worker, isMainThread, parentPort } = require('node:worker_threads');

if (isMainThread) {
  const worker = new Worker(__filename);
  worker.once('message', (message) => {
    console.log(message);  // 打印 'Hello, world!'。
  });
  worker.postMessage('Hello, world!');
} else {
  // 当收到来自父线程的消息时，则将其发回：
  parentPort.once('message', (message) => {
    parentPort.postMessage(message);
  });
}

• <null> | <MessagePort>

If this thread is a Worker, this is a MessagePort allowing communication with the parent thread. Messages sent using parentPort.postMessage() are available in the parent thread using worker.on('message'), and messages sent from the parent thread using worker.postMessage() are available in this thread using parentPort.on('message').

const { Worker, isMainThread, parentPort } = require('node:worker_threads');

if (isMainThread) {
  const worker = new Worker(__filename);
  worker.once('message', (message) => {
    console.log(message);  // Prints 'Hello, world!'.
  });
  worker.postMessage('Hello, world!');
} else {
  // When a message from the parent thread is received, send it back:
  parentPort.once('message', (message) => {
    parentPort.postMessage(message);
  });
}