Angular Http Delete请求返回未定义[均值堆栈]

import { HttpClient, HttpErrorResponse } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { catchError } from 'rxjs/operators';
import { throwError } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private apiUrl = 'https://example.com/api/resource';

  constructor(private http: HttpClient) {}

  deleteResource(id: number): void {
    this.http.delete(`${this.apiUrl}/${id}`).pipe(
      catchError(this.handleError)
    ).subscribe(
      () => console.log('Resource deleted successfully'),
      error => console.error('Error deleting resource', error)
    );
  }

  private handleError(error: HttpErrorResponse): throwError {
    let errorMessage = 'An unknown error occurred!';
    if (error.error instanceof ErrorEvent) {
      // Client-side errors
      errorMessage = `Error: ${error.error.message}`;
    } else {
      // Server-side errors
      errorMessage = `Error Code: ${error.status}\nMessage: ${error.message}`;
    }
    return throwError(errorMessage);
  }
}