How do I handle JWT errors in Angular?

How do I handle JWT errors in Angular?

To handle JWT errors in Angular, you can use an HTTP interceptor to catch errors globally.

Can you show me an example of an HTTP interceptor?

Sure! Here's a simple example:

import { Injectable } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpErrorResponse } from '@angular/common/http';
import { Observable, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';

@Injectable()
export class JwtInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    return next.handle(req).pipe(
      catchError((error: HttpErrorResponse) => {
        if (error.status === 401) {
          // Handle unauthorized error
          console.error('Unauthorized access - JWT token may be expired.');
        }
        return throwError(error);
      })
    );
  }
}

What should I do when I get a 401 error?

When you get a 401 error, you should check if the JWT token is expired and refresh it if necessary, or redirect the user to the login page.