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RxJS是一种针对异步数据流编程工具,或者叫响应式扩展编程;可不管如何解释RxJS其目标就是异步编程,Angular引入RxJS为了就是让异步可控、更简单。可是最近在升级中遇到了一些问题。
Angular 5.0.5升级RxJS到5.5.3报错:
ERROR Error: Uncaught (in promise): EmptyError: no elements in sequence EmptyError: no elements in sequence at new EmptyError (EmptyError.js:28) at FirstSubscriber._complete (first.js:154) at FirstSubscriber.Subscriber.complete (Subscriber.js:122) at MergeMapSubscriber._complete (mergeMap.js:150) at MergeMapSubscriber.Subscriber.complete (Subscriber.js:122) at MapSubscriber.Subscriber._complete (Subscriber.js:140) at MapSubscriber.Subscriber.complete (Subscriber.js:122) at EmptyObservable._subscribe (EmptyObservable.js:83) at EmptyObservable.Observable._trySubscribe (Observable.js:172) at EmptyObservable.Observable.subscribe (Observable.js:160) at new EmptyError (EmptyError.js:28) at FirstSubscriber._complete (first.js:154) at FirstSubscriber.Subscriber.complete (Subscriber.js:122) at MergeMapSubscriber._complete (mergeMap.js:150) at MergeMapSubscriber.Subscriber.complete (Subscriber.js:122) at MapSubscriber.Subscriber._complete (Subscriber.js:140) at MapSubscriber.Subscriber.complete (Subscriber.js:122) at EmptyObservable._subscribe (EmptyObservable.js:83) at EmptyObservable.Observable._trySubscribe (Observable.js:172) at EmptyObservable.Observable.subscribe (Observable.js:160) at resolvePromise (zone.js:824)
这应该是RxJS升级导致的,参考issue。
方法一
在所有的route里加上pathMath:"full",如
const routes: Routes = [ { path: "", component: IndexComponent }, { path: "home", component: HomeComponent }, { path: "about", component: AboutComponent }, ... ];
改为
const routes: Routes = [ { pathMatch: 'full', path: "", component: IndexComponent }, { pathMatch: 'full', path: "home", component: HomeComponent }, { pathMatch: 'full', path: "about", component: AboutComponent }, ... ];
方法二
RxJS降为版本5.5.2。
注意:降版本时一定要把之前的卸载掉。
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