"The NPM script 'start' exited without indicating that the create-react-app server was listening

Question

当我尝试运行我的项目时，我总是会收到以下错误：

An unhandled exception occurred while processing the request.
AggregateException: One or more errors occurred. (One or more errors
occurred. (The NPM script 'start' exited without indicating that the
create-react-app server was listening for requests. The error output
was:
)) System.Threading.Tasks.Task<TResult>.GetResultCore(bool
waitCompletionNotification)
InvalidOperationException: The NPM script 'start' exited without
indicating that the create-react-app server was listening for
requests. The error output was:
Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer.ReactDevelopmentServerMiddleware.StartCreateReactAppServerAsync(string
sourcePath, string npmScriptName, ILogger logger)
Stack Query Cookies Headers AggregateException: One or more errors
occurred. (One or more errors occurred. (The NPM script 'start' exited
without indicating that the create-react-app server was listening for
requests. The error output was: ))
System.Threading.Tasks.Task<TResult>.GetResultCore(bool
waitCompletionNotification)
Microsoft.AspNetCore.SpaServices.Extensions.Util.TaskTimeoutExtensions.WithTimeout<T>(Task<T>
task, TimeSpan timeoutDelay, string message)
Microsoft.AspNetCore.SpaServices.Extensions.Proxy.SpaProxy.PerformProxyRequest(HttpContext
context, HttpClient httpClient, Task<Uri> baseUriTask,
CancellationToken applicationStoppingToken, bool proxy404s)
Microsoft.AspNetCore.Builder.SpaProxyingExtensions+<>c__DisplayClass2_0+<<UseProxyToSpaDevelopmentServer>b__0>d.MoveNext() Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext
httpContext)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext
context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext
context)
Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext
context)
Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext
context)
Garrigues.BDC.Web.Classes.LoggingMiddlewareFront.Invoke(HttpContext
httpContext, IUserInfo userInfo) in LoggingMiddlewareFront.cs
+
await _next(httpContext); Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext
context)
Show raw exception details InvalidOperationException: The NPM script
'start' exited without indicating that the create-react-app server was
listening for requests. The error output was:
Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer.ReactDevelopmentServerMiddleware.StartCreateReactAppServerAsync(string
sourcePath, string npmScriptName, ILogger logger)

我已经尝试了我在网上看到的所有东西，但仍然失败。我已经执行了"；npm安装"；以及我在网上类似问题中看到的许多npm命令。我已经更新了npm、node.js和visualstudio。

Answer 1

取消安装节点并重新安装。还请安装nvm(节点版本管理器(。

Answer 2

不是这样的解决方案，但运行yarn start(或npm start，取决于您使用的内容(应该会给您实际的错误消息。