npm create-react-app后开始显示错误

如何解决npm create-react-app后开始显示错误

我一直在尝试创建一个新的react应用，但无法npm启动它。 我无法理解错误消息。希望有人知道。 我也昨天尝试了github部署（如果有帮助的话）。 我在npm启动后收到的错误是：-

D:\myportfolio>npm start

> myportfolio@0.1.0 start D:\myportfolio
> react-scripts start

i ｢wds｣: Project is running at http://192.168.43.213/
i ｢wds｣: webpack output is served from
i ｢wds｣: Content not from webpack is served from D:\myportfolio\public
i ｢wds｣: 404s will fallback to /
Starting the development server...

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

Error: spawn powershell ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:267:19)
    at onErrorNT (internal/child_process.js:469:16)
    at processticksAndRejections (internal/process/task_queues.js:84:21)
Emitted 'error' event on ChildProcess instance at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:273:12)
    at onErrorNT (internal/child_process.js:469:16)
    at processticksAndRejections (internal/process/task_queues.js:84:21) {
  errno: 'ENOENT',code: 'ENOENT',syscall: 'spawn powershell',path: 'powershell',spawnargs: [
    '-noprofile','-NonInteractive','–ExecutionPolicy','Bypass','-EncodedCommand','UwB0AGEAcgB0ACAAIgBgACIAaAB0AHQAcAA6AC8ALwBsAG8AYwBhAGwAaABvAHMAdAA6ADMAMAAwADAAYAAiACIA'
  ]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! myportfolio@0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the myportfolio@0.1.0 start 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!     C:\Users\user\AppData\Roaming\npm-cache\_logs\2020-09-19T06_53_55_730Z-debug.log

解决方法

最近我遇到了这个确切的问题，这个Windows修复程序对我有用：

1. 转到控制面板
2. 转到系统和安全->系统->高级系统设置
3. 签出名为“高级”的标签，然后转到“环境变量”
4. 单击“路径”，在路径末尾添加“ C：\ Windows \ System32”，并用分号分隔，对其进行编辑。例如（AppData \ Roaming \ npm; C：\ Windows \ System32）。

最后重新启动计算机是一种很好的措施。这是无数次尝试重新安装节点模块后唯一对我有用的修复程序。