我在chrome控制台中得到异常堆栈跟踪，这是283行，引用我的代码的行是80 - 81（搜索单词卡）。
at CardService.getCards (eval at 70
(http://localhost:8080/app.js:142:1), <anonymous>:46:14)
at CardsComponent.ngOnInit (eval at 144 (http://localhost:8080/app.js:7:1), <anonymous>:19:26)
我想知道为什么所有的垃圾都会变成异常，有没有办法摆脱它？
Stacktrace（减少了一点）
(unknown) ERROR Error: Uncaught (in promise): Response with status:
401 Unauthorized for URL: http://localhost:5000/api/user
at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:783:31)
at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:754:17)
at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:831:17)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31)
at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36)
at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47)
at drainMicroTaskQueue (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:595:35)
at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:502:21)
at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14)
at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17)
at ____________________Elapsed_13_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_
(http://localhost)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43)
at Zone.scheduleMicroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:255:25)
at scheduleResolveOrReject (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:829:14)
at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:778:21)
at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:754:17)
at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:831:17)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31)
at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36)
at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47)
at drainMicroTaskQueue (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:595:35)
at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:502:21)
at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14)
at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17)
at ____________________Elapsed_1_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_
(http://localhost)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43)
at Zone.scheduleMicroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:255:25)
at scheduleResolveOrReject (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:829:14)
at resolvePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:778:21)
at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:709:17)
at SafeSubscriber.eval [as _error] (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:68:85)
at SafeSubscriber.__tryOrUnsub (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:238:16)
at SafeSubscriber.error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:197:26)
at Subscriber._error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:128:26)
at Subscriber.error (eval at <anonymous> (http://localhost:8080/vendor.js:14:1), <anonymous>:102:18)
at XMLHttpRequest.onLoad (eval at <anonymous> (http://localhost:8080/vendor.js:336:1), <anonymous>:1270:34)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:424:31)
at Object.onInvokeTask (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:4085:33)
at ZoneDelegate.invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:423:36)
at Zone.runTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:191:47)
at ZoneTask.invokeTask [as invoke] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:498:34)
at invokeTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1364:14)
at XMLHttpRequest.globalZoneAwareCallback (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1382:17)
at ____________________Elapsed_94_ms__At__Thu_Jul_27_2017_14_51_10_GMT_0300__Turkey_Standard_Time_
(http://localhost)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:109:22)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43)
at Zone.scheduleEventTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:261:25)
at XMLHttpRequest.eval [as addEventListener] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:1634:33)
at XMLHttpRequest.__zone_symbol__send (<anonymous>:1:682)
at ZoneTask.scheduleTask [as scheduleFn] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:2616:24)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:410:26)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2706:1), <anonymous>:117:35)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Object.onScheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:300:29)
at ZoneDelegate.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:404:51)
at Zone.scheduleTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:235:43)
at Zone.scheduleMacroTask (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:258:25)
at eval (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:2640:29)
at XMLHttpRequest.proto.(anonymous function) [as send] (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1),
<anonymous>:1221:20)
at Observable.eval [as _subscribe] (eval at <anonymous> (http://localhost:8080/vendor.js:336:1), <anonymous>:1314:18)
at Observable._trySubscribe (eval at <anonymous> (http://localhost:8080/vendor.js:6:1), <anonymous>:171:25)
at Observable.subscribe (eval at <anonymous> (http://localhost:8080/vendor.js:6:1), <anonymous>:159:65)
at eval (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:68:15)
at new ZoneAwarePromise (eval at <anonymous> (http://localhost:8080/polyfills.js:2712:1), <anonymous>:847:29)
at Observable.toPromise (eval at <anonymous> (http://localhost:8080/vendor.js:2626:1), <anonymous>:66:12)
at CardService.getCards (eval at 70 (http://localhost:8080/app.js:142:1), <anonymous>:46:14)
at CardsComponent.ngOnInit (eval at 144 (http://localhost:8080/app.js:7:1), <anonymous>:19:26)
at checkAndUpdateDirectiveInline (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:11038:19)
at checkAndUpdateNodeInline (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12534:17)
at checkAndUpdateNode (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12473:16)
at debugCheckAndUpdateNode (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13334:59)
at debugCheckDirectivesFn (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13275:13)
at Object.eval [as updateDirectives] (ng:///AppModule/CardsComponent_Host.ngfactory.js:8:5)
at Object.debugUpdateDirectives [as updateDirectives] (eval at <anonymous> (http://localhost:8080/vendor.js:67:1),
<anonymous>:13260:21)
at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12440:14)
at callViewAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12805:21)
at execEmbeddedViewsAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12763:17)
at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12441:5)
at callViewAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12805:21)
at execComponentViewsAction (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12737:13)
at checkAndUpdateView (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:12446:5)
at callWithDebugContext (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:13660:42)
at Object.debugCheckAndUpdateView [as checkAndUpdateView] (eval at <anonymous> (http://localhost:8080/vendor.js:67:1),
<anonymous>:13200:12)
at ViewRef_.detectChanges (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:10371:18)
at eval (eval at <anonymous> (http://localhost:8080/vendor.js:67:1), <anonymous>:5009:63)
at Array.forEach (<anonymous>)
答案 0 :(得分：0)
前两行也是相关的我认为？
(unknown) ERROR Error: Uncaught (in promise): Response with status:
401 Unauthorized for URL: http://localhost:5000/api/user
请问会导致ngOnInit失败吗？