const rs = new ReadableStream({

  start(controller) {

    controller.enqueue(new Uint8Array(3));

    controller.close();

  }

});

​

const reader = rs.getReader();

​

console.clear();

​

reader.read().then(d => {

  console.log("read 1");

});

​

reader.read().then(d => {

  console.log("read 2");

});

​

reader.closed.then(() => {

  console.log("closed");

});

​