Angular:如何使用 RXJS 6 调用 finally() [英] Angular : how to call finally() with RXJS 6

问题描述

我使用的是 RXJS 5，现在当我将它升级到 6 时，我遇到了一些问题.

I was using RXJS 5, now as I upgraded it to 6, I am facing some problems.

以前我可以使用 catch 和 finally 但随着更新 catch 被 catchError 替换(在管道中)现在如何使用 finally?

Previously I was able to use catch and finally but as per update catch is replaced with catchError (with in the pipe) now how to use finally?

我还有一些问题:

我需要改变throw->throwError吗(在下面的代码Observable.throw(err);)

Do I need to change throw->throwError (in below code Observable.throw(err);)

import { Observable, Subject, EMPTY, throwError } from "rxjs";
import { catchError } from 'rxjs/operators';

return next.handle(clonedreq).pipe(
          catchError((err: HttpErrorResponse) => {
        if ((err.status == 400) || (err.status == 401)) {
            this.interceptorRedirectService.getInterceptedSource().next(err.status);
            return Observable.empty();
        } else {
            return Observable.throw(err);
        }
       }) 
        //, finally(() => {
        //  this.globalEventsManager.showLoader.emit(false);
        //});
      );

还有现在如何使用publish().refCount()?

Also how to use publish().refCount() now ?

推荐答案

• 使用 throwError 而不是 Observable.throw，参见 https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md#可观察类

  finally 已重命名为 finalize，您将在 pipe() 和其他运算符中使用它.

  finally was renamed to finalize and you'll use it inside pipe() among other operators.

  与 publish() 和 refCount() 相同.两者都是您将在 pipe() 中使用的运算符.

  the same with publish() and refCount(). Both are operators you'll use inside pipe().

  这篇关于Angular:如何使用 RXJS 6 调用 finally()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！