小编Khi*_*rad的帖子

升级到 angular 9 后出现此错误。我使用的是 Visual Studio 2019，带有 angular 的 ASP .NET 核心。即使我创建新项目并将 angular 更新为 9 版本，它也会停止工作。

页面响应的完整列表是：

TimeoutException：Angular CLI 进程没有在 0 秒的超时时间内开始侦听请求。检查日志输出以获取错误信息。Microsoft.AspNetCore.SpaServices.Extensions.Util.TaskTimeoutExtensions.WithTimeout(Task task, TimeSpan timeoutDelay, string message) Microsoft.AspNetCore.SpaServices.Extensions.Proxy.SpaProxy.PerformProxyRequest(HttpContext context, HttpClient httpClient, Task baseUriTask, CancellationToken applicationStoppingToken, bool proxy404s) Microsoft.AspNetCore.Builder.SpaProxyingExtensions+<>c__DisplayClass2_0+<b__0>d.MoveNext() Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

我的 package.json 是：

{
  "name": "webapplication10",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "build:ssr": "ng run WebApplication10:server:dev",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "9.0.0",
    "@angular/cdk": "~9.0.0", …