從角度5到角度7的遷移

Question

昨天我已將我的應用程序從Angular 5遷移到角度7.在此過程中，我已按照建議在運行應用程序時將EventSource更改為EventSourcePolyfill。 但從那時起，我面臨一個奇怪的問題。 這就是我在控制台中遇到的問題如下：

ERROR TypeError: Cannot read property 'heartbeatTimeout' of undefined
    at new EventSourcePolyfill (eventsource.js:155)
    at AppFooterComponent.push../src/app/layout/footer/footer.component.ts.AppFooterComponent.connect (footer.component.ts:133)
    at SafeSubscriber._next (footer.component.ts:52)
    at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.__tryOrUnsub (Subscriber.js:196)
    at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.next (Subscriber.js:134)
    at Subscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber._next (Subscriber.js:77)
    at Subscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (Subscriber.js:54)
    at AsyncAction.dispatch (timer.js:31)
    at AsyncAction.push../node_modules/rxjs/_esm5/internal/scheduler/AsyncAction.js.AsyncAction._execute (AsyncAction.js:63)
    at AsyncAction.push../node_modules/rxjs/_esm5/internal/scheduler/AsyncAction.js.AsyncAction.execute (AsyncAction.js:51)

這就是我在我的代碼中所做的：

import { EventSourcePolyfill } from 'ng-event-source';

let source = new EventSourcePolyfill('/api/v1/events/register');

任何人都可以建議我如何擺脫這個問題。

謝謝。

Answer 1

您必須傳遞其他參數，如

eventSource = new EventSourcePolyfill(url,
    { heartbeatTimeout: 5000, connectionTimeout: 5000, headers: { 'Authorization': 'Basic foo' }});