example.js

fetch('/endpoint')
.then(res => {
  if (res.ok) {
    return res.json();
  }
  throw new Error(res.statusText);
})
// handle response here
.then(({ status, payload }) => {
  switch (status) {
    // ...handle various responses that the service may have sent and return a corresponding value
    case [OK]:
      return nextAction(payload);
    case [SOME_OTHER_STATUS]:
      return aDifferentAction(payload);
    default:
      throw new Error("unknown status");
  }
})
.then(action => dispatch(action))
.catch(err => {
  // handle errors and dispatch appropriate error messaging
});