[RxJS 6] The Retry RxJs Error Handling Strategy

最新推荐文章于 2020-02-10 14:55:00 发布

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最新推荐文章于 2020-02-10 14:55:00 发布

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本文介绍如何使用RxJS v6+中的'retryWhen'和'delayWhen'操作符来处理错误可观察对象。通过实例展示了如何在发生错误后等待2秒重新尝试请求。

When we want to handle error observable in RxJS v6+, we can use 'retryWhen' and 'delayWhen':

const courses$: Observable<Counse[]> = http$
    .pipe(
        tap(() => console.log("HTTP request")),
        map(res => Object.values(res['payload'])),
        shareReplay(), // avoid using async pipe multi times causing multi network request
        retryWhen(errors => errors.pipe(
           delayWhen(() => timer(2000)) // wait 2s after the error observable happens    
        ))
)