pokemon.ducks.step.3.ts

// REDUCER
function reducer(state: PokemonState, action: PokemonAction): PokemonState {
  switch (action.type) {
    case "FETCH_POKEMON_PENDING":
      return { ...state, isLoading: true };
    case "FETCH_POKEMON_COMPLETED":
      return { ...state, isLoading: false, pokemons: action.pokemons };
    case "FETCH_POKEMON_FAILED":
      return { ...state, isLoading: false, pokemons: [] };
  }
}