异常信息

'vue-cli-service' 不是内部或外部命令，也不是可运行的程序
或批处理文件。
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! vue-admin-template@4.4.0 dev: `vue-cli-service serve`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the vue-admin-template@4.4.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     E:\develop\npm\node_cache\_logs\2021-04-22T01_14_12_466Z-debug.log

异常原因

vue项目下未存在node_modules文件

解决方法

在vue项目下打开命令提示符窗口,输入npm i或npm install完成依赖文件下载即可
``