text: import { SET_ALERT, REMOVE_ALERT } from '../actions/types';
  
  const initialState = [];
  
  export default function(state = initialState, action) {
      const { type, payload } = action;
  
      switch(type) {
          case SET_ALERT:
              return [...state, payload]
          case REMOVE_ALERT:
              return state.filter(alert => alert.id !== payload);
          default:
              return state;
      }
  }
  