worker_threads.getEnvironmentData(key)

• key <any> 任何任意的、可克隆的 JavaScript 值，可用作 <Map> 键。
• 返回：<any>

在工作线程中，worker.getEnvironmentData() 会返回传给生成线程的 worker.setEnvironmentData() 的数据的克隆。每个新的 Worker 会自动收到自己的一份环境数据副本。

【Within a worker thread, worker.getEnvironmentData() returns a clone of data passed to the spawning thread's worker.setEnvironmentData(). Every new Worker receives its own copy of the environment data automatically.】

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

if (isMainThread) {
  setEnvironmentData('Hello', 'World!');
  const worker = new Worker(new URL(import.meta.url));
} else {
  console.log(getEnvironmentData('Hello'));  // Prints 'World!'.
}'use strict';

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

if (isMainThread) {
  setEnvironmentData('Hello', 'World!');
  const worker = new Worker(__filename);
} else {
  console.log(getEnvironmentData('Hello'));  // Prints 'World!'.
}拷贝