Admin

03-22-2026, 06:28 AM #1

HTTP interceptors in Angular allow you to modify requests and responses globally. They are perfect for authentication and error handling.

Common interceptor use cases:
- Adding JWT tokens to every API request
- Global error handling and retry logic
- Loading spinners for HTTP requests
- Caching responses
- Logging request/response details

Example auth interceptor:
export const authInterceptor: HttpInterceptorFn = (req, next) => {
  const token = inject(AuthService).getToken();
  const cloned = req.clone({ setHeaders: { Authorization: `Bearer ${token}` } });
  return next(cloned);
};

Error handling interceptor pattern:
- Catch 401 errors and redirect to login
- Catch 500 errors and show user-friendly messages
- Implement retry logic for network failures
- Log errors to monitoring service

Interceptors keep your code DRY and maintainable. Share your interceptor patterns!

indian

03-25-2026, 01:34 PM #2

HTTP interceptors are one of Angular's most powerful features for cross-cutting concerns. Using functional interceptors in newer Angular versions makes them even cleaner to implement. Chaining multiple interceptors for auth tokens, error handling, loading indicators, and request caching creates a robust HTTP layer without cluttering individual service calls.