airbnb_clone/frontend/reducers/session_errors_reducer.js

import {
    RECEIVE_SESSION_ERRORS,
    RECEIVE_CURRENT_USER,
    CLEAR_ERRORS,
} from '../actions/session_actions';


export default (state = [], action) => {
    Object.freeze(state);
    switch (action.type) {
        case RECEIVE_SESSION_ERRORS:
            return action.errors;
        case RECEIVE_CURRENT_USER:
            return [];
        case CLEAR_ERRORS:
            return [];
        default:
            return state;
    }
};