Cannot read property 'outlets' of null in Angular 4

Question

I have Angular 4.3.6 project where a template snippet produces this error.

Template block:

{{article?.

Answer 1

 <a  [routerLink]="['/language',language.iso639_1 || 'all']" >{{language.name}}</a>

I was also facing the same issue (Cannot read property 'outlets' of null ) but the above code that I have written, worked for me.

Answer 2

? in article?.id is working fine, but the RouterLink directive doesn't like getting a null passed.

You could work around using something like:

<a *ngIf="article" [routerLink]="['/article',article?.id]">{{article?.title}}</a>
<a *ngIf="!article">{{article?.title}}</a>