immutable

• immer: https://github.com/immerjs/immer
• immutability-helper: https://github.com/kolodny/immutability-helper
• 参考资源: https://www.zhihu.com/question/446377023/answer/1756125862https://www.zhihu.com/question/28016223/answer/50154351https://www.zhihu.com/question/28016223/answer/50154351

tip

• immer set dynamic path: https://stackoverflow.com/questions/59502573/why-immer-js-doesnt-allow-setting-dynamic-properties-on-draft;
• immmutability-help: 设置多级obj,前置不存在,update会报错;