worker_threads.workerData

History

An arbitrary JavaScript value that contains a clone of the data passed to this thread's Worker constructor.

The data is cloned as if using postMessage(), according to the HTML structured clone algorithm.

import { Worker, isMainThread, workerData } from 'node:worker_threads';

if (isMainThread) {
  const worker = new Worker(new URL(import.meta.url), { workerData: 'Hello, world!' });
} else {
  console.log(workerData);  // Prints 'Hello, world!'.
}

JavaScript

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

if (isMainThread) {
  const worker = new Worker(__filename, { workerData: 'Hello, world!' });
} else {
  console.log(workerData);  // Prints 'Hello, world!'.
}

JavaScript