RXJS 6 处理http Observables 的方式是什么？

Question

我注意到我的代码在新项目中使用时不起作用：import { Injectable } from '@angular/core';import { HttpClient } from '@angular/common/http';import { Observable } from 'rxjs';import { TypeAndCountURL } from '@app/constants';import { HttpErrorService } from '@app/services/http-error.service';import { TypeAndCountResponseBody, TypeAndCountRequestBody } from '@app/models/type-and-count/bodies.interface';@Injectable({  providedIn: 'root'})export class ApiService {  constructor (private http: HttpClient, private httpErrorService: HttpErrorService) {}  postTypeAndCountRequest(typeAndCountRequestBody: TypeAndCountRequestBody): Observable<TypeAndCountResponseBody> {    return this.http.post<TypeAndCountResponseBody>(TypeAndCountURL, typeAndCountRequestBody).pipe(      catchError(this.httpErrorService.handleError<TypeAndCountResponseBody>('postTypeAndCountRequest'))    );  }}具体来说，我得到 Cannot find name 'catchError'. Did you mean 'RTCError'?ts(2552)读到这里，我发现我可以通过单独导入来解决这个问题（从 rxjs/operators .. whihc 很好，但是）.. 而且整个结构是 rxjs 5 的兼容模式......是什么RXJS 6 处理错误响应的方式？

Answer 1

您可以使用

import { catchError } from "rxjs/operators";

fetchUser() {

       this.userService.getProfile()

          .subscribe(

             (data: User) => this.userProfile = { ...data }

              , // success path

              error => this.error = error // error path

       );

    }