报错信息如下：

PS E:\test_learn\day2\vuebaseday2> npm install element-ui -S
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: vuebaseday2@0.1.0
npm ERR! Found: vue@3.2.45
npm ERR! node_modules/vue
npm ERR!   vue@"^3.2.13" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vue@"^2.5.17" from element-ui@2.15.10
npm ERR! node_modules/element-ui
npm ERR!   element-ui@"*" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See D:\soft\nodejs\node_cache\eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\soft\nodejs\node_cache\_logs\2022-11-13T04_54_14_478Z-debug-0.log

 原因是因为Vue版本和element版本不匹配

解决办法：

vue3运行如下命令：

npm install element-plus --save

vue2运行如下命令：

npm install element-ui --save