if (typeof Worker !== 'undefined') {
    // Create a new
    const worker = new Worker('./web-worker.worker', { type: 'module' });
    worker.onmessage = ({ data }) => {
      console.log(`page got message: ${data}`);
    };
    worker.postMessage('hello');
  } else {
    // Web Workers are not supported in this environment.
    // You should add a fallback so that your program still executes correctly.
  }
}