vue-_.cloneDeep-bug https://www.cnblogs.com/xgqfrms/p/14655538.html # Vue CLI v4.5.6 $ vue create deep-clone-bug $ cd deep-clone-bug $ yarn serve $ node -v # v12.18.0 $ npm -v # 6.14.4 $ yarn -v # 1.22.4 $ yarn add [email protected]