spawn-blahhhhhhh.js

const fromSpawn = spawn(function *() {
  let rejValFirst, rejValSecond, resValLast;
  
  try {
    rejValFirst = yield new Promise((res, rej) => {
      setTimeout(rej.bind(null, 'blaaa...first rejected!!!'), 1000);
    });
  } catch (err) {
    console.error('Inside spawn error', err);
  }
  
  try {
    rejValSecond = yield new Promise((res, rej) => {
      setTimeout(rej.bind(null, 'blaaa...second rejected!!!'), 1000);
    });
  } catch (err) {
    console.error('Inside spawn error', err);
  }
  
  try {
    resValLast = yield new Promise((res, rej) => {
      setTimeout(res.bind(null, 'yehhhh...last resolved!!!'), 1000);
    });
  } catch (err) {
    console.error('Inside spawn error', err);
  }
  
  console.log('End of spawn', rejValFirst, rejValSecond, resValLast);
  return 'BLAAAHHHHH';
});

fromSpawn.then((data) => {
  console.log('Data from spawn', data);
}).catch((err) => {
  console.error('Err from spawn', err.message);
});