title: NgFor only supports binding to Iterables such as Arrays angular8
body: <p>I want to recover the data from github and display these data, but it gives me error. Editor code underline this.followers in file github-followers.component.ts .</p>
  
  <p><strong>githup-followers.component.html</strong></p>
  
  <pre><code>&lt;div *ngFor="let follower of followers" class="media"&gt;
      &lt;div class="media-left"&gt;
          &lt;a href="#"&gt;
              &lt;img class="avatar media-object" src="{{ follower.avatar_url }}"&gt;
          &lt;/a&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>githup-followers.component.ts</strong></p>
  
  <pre><code>constructor(private service:GithubFollowersService) { }
  
    ngOnInit() {
      this.service.getAll()
      .subscribe(followers =&gt; this.followers = followers);
    }
  </code></pre>
  
  <p><strong>githup-followers.service.ts</strong></p>
  
  <pre><code>export class GithubFollowersService extends DataService {
  
    constructor(http:Http) {
      super('https://api.github.com/users/IDBRAHIMDEV/followers',http)
     }
  </code></pre>
  
  <p><strong>data.service.ts</strong></p>
  
  <pre><code>  constructor(private url : string ,private http : Http) { }
  
    getAll(){
      return this.http.get(this.url).
      pipe(
        catchError(
          this.handleError
        )   
      )}
  </code></pre>