Angular CLI (ng serve) Troubleshooting
Angular developers often encounter EADDRINUSE: address already in use when running multiple projects.
1. Change Port on Fly
Don't want to kill the other process? Just start Angular on a different port.
ng serve --port 42012. Check Angular JSON Configuration
If you want to change the default port permanently, edit your angular.json file:
"serve": {
"options": {
"port": 4201
}
}