运行前端项目报错解决方法

在运行项目是npm run dev
运行到最后报一下错误

DONE  Compiled successfully in 11178ms                                  
  App running at:
  - Local:   http://localhost:80
  - Network: unavailable

  Note that the development build is not optimized.
  To create a production build, run npm run build.

events.js:292
      throw er; // Unhandled 'error' event
      ^

Error: spawn cmd ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:269:19)
    at onErrorNT (internal/child_process.js:465:16)
    at processTicksAndRejections (internal/process/task_queues.js:80:21)
Emitted 'error' event on ChildProcess instance at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)
    at onErrorNT (internal/child_process.js:465:16)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'spawn cmd',
  path: 'cmd',
  spawnargs: [ '/c', 'start', '""', '/b', 'http://localhost:80' ]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! app@0.1.0 serve: `vue-cli-service serve`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the app@0.1.0 serve script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     D:\node\node_cache\_logs\2020-12-19T07_42_04_693Z-debug.log

解决方法：
原因： 电脑缺少cmd运行程序的环境变量
按如图设置cmd的环境变量，然后重启vscode即可。

解决 Network: unavailable
在vite.config.js

module.exports = {

    configureWebpack: {

        // other webpack options to merge in ...

    },

    // devServer Options don't belong into `configureWebpack`

    devServer: {

        public: '197.10.59.150:8080',//这里的ip地址换成本机的ip地址

        hot: true,

        disableHostCheck: true,

    }



};