51工具盒子运行安装命令：
npm install vue-router@next -S
报错信息如下：
npm ERR! code ERESOLVE
npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: day5-demo@0.0.0
npm ERR! Found: vue@3.0.2
npm ERR! node_modules/vue
npm ERR! peer vue@"3.0.2" from @vue/compiler-sfc@3.0.2
npm ERR! node_modules/@vue/compiler-sfc
npm ERR! peer @vue/compiler-sfc@"*" from rollup-plugin-vue@6.0.0-beta.10
npm ERR! node_modules/rollup-plugin-vue
npm ERR! rollup-plugin-vue@"^6.0.0-beta.10" from vite@1.0.0-rc.6
npm ERR! node_modules/vite
npm ERR! dev vite@"^1.0.0-rc.1" from the root project
npm ERR! @vue/compiler-sfc@"^3.0.0-rc.10" from vite@1.0.0-rc.6
npm ERR! node_modules/vite
npm ERR! dev vite@"^1.0.0-rc.1" from the root project
npm ERR! 1 more (the root project)
npm ERR! vue@"^3.0.0-rc.10" from vite@1.0.0-rc.6
npm ERR! node_modules/vite
npm ERR! dev vite@"^1.0.0-rc.1" from the root project
npm ERR! 1 more (the root project)
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! vue-router@"4.0.13" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: vue@3.2.41
npm ERR! peer vue@"^3.2.0" from vue-router@4.0.13
npm ERR! node_modules/vue-router
npm ERR! vue-router@"4.0.13" 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 C:\Users\zeyi\AppData\Local\npm-cache\eresolve-report.txt for a full report.
npm ERR! A complete log of this run can be found in:
查阅半天，发现原因应该是在安装过程中缺少了依赖，因为刚开始安装了一小段。但更多的可能是npm版本的问题。
大部分的解决方法：
根据错误提示，在命令行中加入--legacy-peer-deps，由于vue与vue-router版本兼容的问题，需要在安装语句后加入需要下载vue-router版本，不然会下载最新的vue-router版本。
npm install --legacy-peer-deps vue-router@4.0.13
也有可能因为是你要下载的router版本过高，如果下载版本过高，在启动项目时会报错，可以下载低版本的vue-router
npm install vue-router@3.1.3 --save-dev
最后在package.json文件中查看是否下载成功
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