My app.component
contains the <nav>
of the website, which uses [routerLink]
to go to the different pages. It imports each of the pages' components. One of the pages is a login page. If the user is not logged in, I want the navigation to say Login- if the user is, Logout.
In app.component
:
my_userO : userO = undefined;
constructor (private my_userS:userS){
my_userS.userChanged.suscribe(temp => this.updateNav());
updateNav(){
this.my_userO = this.my_userS.getUser();
}
logOut(){
this.my_userS.setUser(undefined);
}
and in its template:
<li><a *ngIf="!my_userO" [routerLink]="['LoginPage']">Login</a></li>
<li><a *ngIf="my_userO" [routerLink]="['HomePage']"(click)="logOut()">Logout</a></li>
userS
is a global service (it is bootstrapped in main.ts
and not added as a provider in any of the components I am using it in) I have that looks like this:
public userChanged: EventEmitter<{}>
currentUser : userO = undefined;
constructor(private http:Http){
this.userChanged = new EventEmitter();
}
getLogin(username: string, password: string): Promise<userO>{
return this.http.get(this.getLoginUrl+username).toPromise().then(response => response.json().data).catch(this.handleError);
}
getUser(){
return this.currentUser;
}
setUser(x_userO: userO){
this.currentUser = x_userO;
this.userChanged.emit(undefined);
}
In the login page, I just run getLogin
then setUser
with what the former returned.
My problem is that I get the error "Property suscribe does not exist on type EventEmitter<{}>".
Its a typo
Use subscribe
, not suscribe
I don't have enough reputation to answer Colum below but that's totally incorrect.
emit()
returns voidEventEmitter
extends (inherits) Subject
which is an observable and an observer.
export declare class EventEmitter<T> extends Subject<T>
an EventEmitter
is an rxjs Subject with some modifications, most notably it does not use next() to send a value down the stream but uses emit().
It also allows setting an async logic where the emit will be async.