這次帶給大家Angular5升級後報錯，Angular5升級後報錯的注意事項有哪些，以下就是實戰案例，一起來看一下。
前言
RxJS是一種針對非同步資料流程式設計工具，或稱為響應式擴充程式設計；可不管如何解釋RxJS其目標就是非同步編程，Angular引進RxJS為了就是讓非同步可控、更簡單。可是最近在升級中遇到了一些問題，以下就來給大家介紹下，給同樣遇到這個問題發朋友們一些參考，下面話不多說了，來一起看看詳細的介紹吧。
Angular 5.0.5升級RxJS到5.5.3報錯：
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)
這應該是RxJS升級導致的，參考issue。
方法一
在所有的route裡加上pathMath:"full"，如
const routes: Routes = [
{ path: "", component: IndexComponent },
{ path: "home", component: HomeComponent },
{ path: "about", component: AboutComponent },
...
];改為
const routes: Routes = [
{ pathMatch: 'full', path: "", component: IndexComponent },
{ pathMatch: 'full', path: "home", component: HomeComponent },
{ pathMatch: 'full', path: "about", component: AboutComponent },
...
];方法二
RxJS降為版本5.5.2。
注意：降版本時一定要把先前的卸載掉。
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