trycatch.js

const callApi = () => {

  const response = fetch(...);

  // do stuff with response

  return response;
}

try {
  const response = callApi();
  next(completeAction(response));
}

catch (e) {
  captureException(error);
  next(completeAction(error));
}


//
// Versus
//

const callApi = () => {

  // a specfic try/catch for the fetch
  try {
    return fetch(...);
  }

  // do stuff with response

  catch (error) {
    captureException(error); // get a precise stacktrace
    throw error;
  }
}

try {
  const response = callApi();
  next(completeAction(response));
}

catch (error) {

  captureException(error);
  next(completeAction(new Error('CALL_API Error')));
}