title: Can't get data from JSON file
body: <p>I can't get JSON local file Angular HTTP service. I have these codes:</p>
  
  <pre><code>import {Injectable} from '@angular/core';
  import {Http, Response} from "@angular/http";
  import 'rxjs/add/operator/map'
  
  
  @Injectable()
  export class ApiService {
  
  constructor(private http:Http) {
  }
  
  
  private coinsUrl:string = 'app/data/coins.json';
  
  getMines() {
    return this.http.get(this.coinsUrl).subscribe(
      (res:Response)=&gt; {
        const sss = res.json();
        console.log('sss', sss);
      }
  
    );
  }
  
  }
  </code></pre>
  
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