《vue 3.0探险记》- 运行报错：This dependency was not found

运行安装element ui后，执行npm run serve竟然报错了，报错信息如下：

ERROR  Failed to compile with 1 errors                                                                                                     19:54:55
This dependency was not found:

* core-js/modules/es.object.to-string in ./src/router/index.js

To install it, you can run: npm install --save core-js/modules/es.object.to-string

解决办法

按照提示：npm install --save core-js 安装

或者 npm install core-js@3 -save-dev

执行结束后再运行就可以了~