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header, isNavBarCollapsed observable: filter out undefined state that can occur when using AoT compilation

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Art Lowel
2016-12-13 10:14:47 +01:00
parent 54f3cbc41b
commit 2846dc9446
5 changed files with 15 additions and 4 deletions
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4
src/app/header/header.component.ts
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@@ -3,6 +3,7 @@ import { Store } from "@ngrx/store";
import { HeaderState } from "./header.reducer";
import { HeaderActions } from "./header.actions";
import { Observable } from "rxjs";
import 'rxjs/add/operator/filter';
@Component({
selector: 'ds-header',
@@ -19,6 +20,9 @@ export class HeaderComponent implements OnInit {
ngOnInit(): void {
this.isNavBarCollapsed = this.store.select('headerReducer')
//ensure that state is not null, can happen when using AoT compilation
.filter((state: HeaderState) => state !== null && state !== undefined)
//unwrap navCollapsed
.map(({ navCollapsed }: HeaderState) => navCollapsed);
}