Building Domain-Specific Exception Hierarchies with Custom Error Classes

import { ErrorHandler, Injectable } from '@angular/core';
 
export class AppDomainError extends Error {
  constructor(public code: number, message: string) {
    super(message);
    this.name = 'AppDomainError';
    Object.setPrototypeOf(this, AppDomainError.prototype);
  }
}
 
@Injectable()
export class GlobalErrorHandler implements ErrorHandler {
  handleError(error: unknown): void {
    if (error instanceof AppDomainError) {
      console.error(`Domain Error [Code ${error.code}]: ${error.message}`);
    } else {
      console.error('Unhandled runtime error:', error);
    }
  }
}