Angular Interceptor

Class-based Interceptor (Using withInterceptorsFromDi)
Function-based Interceptor (Using withInterceptors)

Modify Requests: Add Authorization headers, attach tokens.
Modify Responses: Transform data before components receive it.
Global Error Handling: Handle 401 Unauthorized, 403 Forbidden, etc.
Logging: Track all outgoing HTTP requests.

Add an Authorization Token (for secure APIs)
✅ Modify Requests or Responses (add headers, change data)
✅ Handle Errors Automatically (show a message when something fails)
✅ Log Requests for Debugging (see what’s happening in the background)

Function-Based Interceptor (Simple & Lightweight)
Class-Based Interceptor (Advanced & More Powerful)