I am unable to create a blob from the response stream of a request (the response comes from a node js server), here is the code:

fetch('/api/load', {
  method: 'POST',
  headers: { 'Content-Type': 'text/plain' },
  body: src

}).then((response) => {
  const reader = response.body.getReader()

  return new ReadableStream({
    start(controller) {
      return pump()

      function pump() {
        return reader.read().then(({ done, value }) => {
          if (done) {
            controller.close();
            return;
          }
          controller.enqueue(value);
          return pump();
        })
      }
    }
  })

}).then((stream) => {
  // What to do next with the stream???
})

I already tried new Blob([new Uint8Array(stream)], {type: 'image/jpeg'}), but it doesn't work :(

What is the correct way to create a blob from the stream?