How to cancel current request in interceptor - Angular 4

Question

As you know it\'s possible to use Interceptors in new versions of Angular 4.

In mine, I want to cancel a request in interceptor in some conditions. So i

Answer 1

To Angular 6, you need can user the following structure to return a empty Observable:

import {Observable} from 'rxjs';
import {empty} from 'rxjs/internal/Observer';

//...

intercept(req: HttpRequest, next: HttpHandler): Observable> {
    if (stopThisRequest) {
        return Observable.create(empty);
    } else {
        return next.handle(req);
    }
}