app\static\js\reducers\collection(1).jsx

export default (state = {}, action) => {
    switch(action.type) {
        case 'COLLECTION_PAGE_LOADED':
            return {
                ...state,
                collection: action.payload.collection
            };
        case 'COLLECTION_PAGE_UNLOADED':
            return {};
        default:
            return state;
    }
};