Custom OData Query String with Http Interceptor

custom-http-interceptor.ts

import { Injectable } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpErrorResponse, HttpResponse } from '@angular/common/http';

@Injectable()
export class CustomInterceptor implements HttpInterceptor {
    constructor() { }

    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

        if (request.params.has('$count')) {
            let customParams = request.params.delete('$count');
            customParams = customParams.append('$inlinecount', 'allpages');
            request = request.clone({ params: customParams });
        }
        return next.handle(request);
      
    }
}