val2

src/app/validators/username.validator.ts

@@ -0,0 +1,31 @@
+
+import { AbstractControl } from '@angular/forms';
+import { RegistrationService } from '../registration.service';
+
+
+export class ValidateUserName{
+
+constructor(
+		private RS: RegistrationService
+		){ }
+
+ validateUserName( control: AbstractControl ){
+	//var RS = new RegistrationService(null);
+	/*
+	this.registrationService2.validateUserName( control.value ).subscribe( data => {
+		console.log( data );
+		if( control.value != data.username ){
+		return{
+			validUserName: true
+		};
+	}
+	return null;
+
+	});
+	*/
+	}
+
+
+}
+
+