react/redux中getIn()这个函数什么作用？

Question

function mapStateToProps(state) {
    return {
        loadingState: state.getIn(['pageState','isLoading']),
        menuState: state.getIn(['pageState','isShowMenu']),
        bgImage: state.getIn(['setting','bgImage']),
        isShowRoomInfo: state.getIn(['pageState','isShowRoomInfo']),
        userState: state.get('userState')
    };
}

不明觉厉

Answer 1

目测是 Immutable.js 的方法 http://facebook.github.io/imm...