可以使用tap操作符来进行错误处理，并将catchError保留在最后一个操作符中，以便处理未处理的错误。以下是代码示例：

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

@Injectable() export class MyInterceptor implements HttpInterceptor {

intercept(req: HttpRequest, next: HttpHandler): Observable> {

return next.handle(req).pipe(
  tap(event => {
    if (event instanceof HttpResponse) {
      // do something with the response
    }
  }),
  catchError(error => {
    // handle error
    return throwError(error);
  })
);

} }