angular - Angular4: HttpClient - many requests in succession -
i have http request list of items feed. feed api requires page param, limited 20. first 60 instead, need make 3 requests requestoptions.params.set('page', 1); this.http.get(environment.api+ '.feed.json', requestoptions) requestoptions.params.set('page', 2); this.http.get(environment.api+ '.feed.json', requestoptions) requestoptions.params.set('page', 3); this.http.get(environment.api+ '.feed.json', requestoptions) what best way deal ordered list? not fond of nesting your service: getpage(page) { /*init requestoptions*/ requestoptions.params.set('page', page); return this.http .get(environment.api+ '.feed.json', requestoptions) .map(/*map object expected one*/) .catch(/*catch http exception*/); } somewhere call service let allpages = []; observable.forkjoin( this.service.getpage(1); this.service.getpage(2); this.service.getpage(3); ).subscribe((resparray) =>{ allpages