import { HttpInterceptor, HttpEvent, HttpHandler, HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs';
import { NgProgress } from '@ngx-progressbar/core';
import { NgProgressHttpConfig } from './ng-progress-http.interface';
export declare class NgProgressInterceptor implements HttpInterceptor {
    private _inProgressCount;
    private _progressRef;
    private readonly _config;
    constructor(ngProgress: NgProgress, config?: NgProgressHttpConfig);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
    /**
     * Check if request is silent.
     * @param req request
     */
    private checkUrl;
}