fake-sync.js

const wt = require('worker_threads');

if (wt.isMainThread) {
  console.log("in main");
  const data = new Int32Array(new SharedArrayBuffer(4));
  const worker = new wt.Worker(__filename, {
    workerData: data
  });

  Atomics.wait(data, 0, 0);
  console.log(data[0]);
} else {
  Atomics.store(wt.workerData, 0, 42);
  Atomics.notify(wt.workerData, 0);
}