TimeoutException: The Angular CLI process did not start listening for requests within the timeout period of 0 seconds

Question

I\'m getting this error after upgrading to angular 9. I\'m using visual studio 2019, ASP .NET core with angular. Even if I create new project and update angular to 9 version

Answer 1

Here is a workaround:

• In package.json change the start-script from "ng serve" to "ngserve"

"scripts": {
  "start": "ngserve",

• In the same directory create a file ngserve.cmd with the following content:

@echo ** Angular Live Development Server is listening on localhost:%~2, open your browser on http://localhost:%~2/ **
ng serve %1 %~2

Now Dotnet gets the line it is waiting for. After that the command ng serve will start the server (so in fact the Angular Live Development Server is not yet listening), the browser will open, and first it won't work (ng serve still compiling), but if you press reload after a while, it should be fine.

This is just a workaround, but it works for us.