What is the best way to deal with a fetch error in react redux?

Question

I have one reducer for Clients, one other for AppToolbar and some others...

Now lets say that I created a fetch action to delete client, and if it fails I have code

Answer 1

Erik’s answer is correct but I would like to add that you don’t have to fire separate actions for adding errors. An alternative approach is to have a reducer that handles any action with an error field. This is a matter of personal choice and convention.

For example, from Redux real-world example that has error handling:

// Updates error message to notify about the failed fetches.
function errorMessage(state = null, action) {
  const { type, error } = action

  if (type === ActionTypes.RESET_ERROR_MESSAGE) {
    return null
  } else if (error) {
    return error
  }

  return state
}