loading-reducer-basic.ts

export function reducer(
  state = initialState,
  action: Actions
) {
  switch (action.type) {
    case ActionTypes.Add:
      return { data: [ ...state.data, action.payload ] };
    case ActionTypes.Remove:
      return { data: state.data.filter((id) => id !== action.payload) };
  }

  return state;
}