// main.js
const { RemoteReadableStream, RemoteWritableStream } = RemoteWebStreams;
(async () => {
  const worker = new Worker('./worker.js');
  // create a stream to send the input to the worker
  const { writable, readablePort } = new RemoteWritableStream();
  // create a stream to receive the output from the worker
  const { readable, writablePort } = new RemoteReadableStream();
  // transfer the other ends to the worker
  worker.postMessage({ readablePort, writablePort }, [readablePort, writablePort]);

  const response = await fetch('./some-data.txt');
  await response.body
    // send the downloaded data to the worker
    // and receive the results back
    .pipeThrough({ readable, writable })
    // show the results as they come in
    .pipeTo(new WritableStream({
      write(chunk) {
        const results = document.getElementById('results');
        results.appendChild(document.createTextNode(chunk)); // tadaa!
      }
    }));
})();

// worker.js
const { fromReadablePort, fromWritablePort } = RemoteWebStreams;
self.onmessage = async (event) => {
  // create the input and output streams from the transferred ports
  const { readablePort, writablePort } = event.data;
  const readable = fromReadablePort(readablePort);
  const writable = fromWritablePort(writablePort);

  // process data
  await readable
    .pipeThrough(new TransformStream({
      transform(chunk, controller) {
        controller.enqueue(process(chunk)); // do the actual work
      }
    }))
    .pipeTo(writable); // send the results back to main thread
};

Mongey, S., Pilossoph, L., & Weinberg, A. (2020). Which Workers Bear the Burden of Social Distancing Policies? (Working Paper No. 27085; Working Paper Series). National Bureau of Economic Research. https://doi.org/10.3386/w27085

The New Hazardous Jobs and Worker Reallocation. COVID-19 and the Labor Market. (n.d.). IZA – Institute of Labor Economics. Retrieved July 27, 2020, from https://covid-19.iza.org/publications/dp13532/

Papanikolaou, D., & Schmidt, L. D. W. (2020). Working Remotely and the Supply-side Impact of Covid-19 (Working Paper No. 27330; Working Paper Series). National Bureau of Economic Research. https://doi.org/10.3386/w27330

Stephany, F., Dunn, M., Sawyer, S., & Lehdonvirta, V. (2020). Distancing Bonus or Downscaling Loss? The Changing Livelihood of US Online Workers in Times of COVID-19 [Preprint]. SocArXiv. https://doi.org/10.31235/osf.io/vmg34

Higbee, T. (2020, April 17). Mattson, Higbee, Aguilar, Nichols, Campbell, Nix, Reinert, Peck, and Lewis-Digital Materials Tutorial BAP. https://doi.org/10.31234/osf.io/9gwpj