Angular 8-当不是错误时，Http post返回错误

import { HttpClient } from '@angular/common/http';

constructor(private http: HttpClient) {}

postData(data: any) {
  this.http.post(url, data).subscribe(
    (response) => {
      // 处理成功响应
      console.log(response);
    },
    (error) => {
      // 处理错误响应
      console.error(error);
    }
  );
}

import { HttpClient, HttpErrorResponse } from '@angular/common/http';

constructor(private http: HttpClient) {}

postData(data: any) {
  this.http.post(url, data).subscribe(
    (response) => {
      // 处理成功响应
      console.log(response);
    },
    (error: HttpErrorResponse) => {
      // 处理错误响应
      if (error.error instanceof Error) {
        // 客户端错误
        console.error('An error occurred:', error.error.message);
      } else {
        // 服务器错误
        console.error(`Backend returned code ${error.status}, body was: ${error.error}`);
      }
    }
  );
}