报错信息

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: undefined@undefined
npm ERR! Found: @typescript-eslint/eslint-plugin@4.1.1
npm ERR! node_modules/@typescript-eslint/eslint-plugin
npm ERR!   dev @typescript-eslint/eslint-plugin@"4.1.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer @typescript-eslint/eslint-plugin@"2.x" from eslint-config-react-app@5.2.1
npm ERR! node_modules/eslint-config-react-app
npm ERR!   dev eslint-config-react-app@"^5.2.1" 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.

错误原因：

node版本错误，npm版本错误

解决方案：

更换与之相匹配的node版本，为了方便管理node；需要安装nvm；

安装后切换nvm use [node版本号] ：切换到指定版本 node