Defaults for state

[klequis]

Is it best to control defaults for state from reducers or selectors Issue with reducer option I see is the established convention is to just return state and would be breaking that convention. If use selectors they would all have logic

if (state.something === null) 
  return someDefaultValue
else
  return state.someValue

However, default values are also set in the declaration of reducer. e.g.,

const someReducer = (state = {}, {type, payload})

Using auth-selectors/getLoggedIn as an example

• the default state for auth is {} so the loggedIn key doesn't exist
• rather than the auth reducer just returning state as the default, should it set values as needed? E.g.,

  ...
  default:
  ...state
  loggedIn: false

• this seems advantageous in that the logic for the default is with the logic for all other cases instead of having the default value in a separate place, i.e., selectors. using the default case as a place to set defaults breaks the app because every time the reducers are called for a case not covered in a given reducer, the default values will be set and overwrite perviously set non-default values.

therefore, default values should be set in the selector