javascript - RXJS 6 处理 http Observables 的方式是什么？

Question

我注意到当我在新项目中使用我的代码时它不起作用:

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，我收到 Cannot find name 'catchError'。您是说“RTCError”吗？ts(2552)

读到这里，我发现我可以通过单独导入它来解决这个问题(从 rxjs/operators ..whihc 很好，但是)..而且整个结构是 rxjs 5 的兼容模式...... RXJS 6 处理错误响应的方式是什么？

Answer 1

你可以使用

import { catchError } from "rxjs/operators";

fetchUser() {
       this.userService.getProfile()
          .subscribe(
             (data: User) => this.userProfile = { ...data }
              , // success path
              error => this.error = error // error path
       );
    }