update-state.js

// Nhan ket qua la 1 array
return state.set('menus', fromJS(payload.menus));

// Them phan tu
return state.set('menus', state.get('menus').push(fromJS(payload.menu)));

// Update 1 phan tu
return state
    .set('sets', state.get('sets').map((setItem) => {
        if (setItem.get('id') === payload.set.id) {
            return fromJS(payload.set)
        }
        return setItem;
    }));