angular - Angular2, Property 'map' does not exist on type 'Observable' -

the imports:

import { component,oninit } '@angular/core'; import { formgroup, formcontrol, validators, formbuilder } '@angular/forms'; import { application } './application'; import { http, response } '@angular/http'; import { ngmodule } '@angular/core';  import { headers } '@angular/http'; import 'rxjs/add/operator/map'; import 'rxjs/rx'; 

the method:

 saveapplcation() {     var application = new application();     application.ssnr = this.form.value.ssnr;     application.loanamount = this.form.value.amount;     application.email = this.form.value.email;     application.phonenumber = this.form.value.phonenumber;     application.repaymenttime = this.form.value.time;      var body: string = json.stringify(application);     var headers = new headers({ "content-type": "application/json" });      this._http.post("api/application/", body, { headers: headers })         .map(returndata => returndata.tostring())         .subscribe(         retur => {             this.showform = false;             this.showmenu = true;         },         error => alert(error),         () => console.log("done post-api/loan")         );  }; 

the error says: ts2339 property 'map' not exist on type 'observable'. typescript virtual projects c:\users\kim\documents\visual studio 2015\projects\newoblig3\newoblig3\app\app.component.ts 52 active

i've seen people import 'rxjs/add/operator/map'; , says it'll work, not in case.

you using visual studio. had same issue there.

i solved installing typescript visual studio 2015

it fixed intellisense observable.