Do you need to unsubscribe from Angular 2 http calls to prevent memory leak? -

do need unsubscribe angular 2 http calls prevent memory leak?

 fetchfilm(index) {         var sub = this._http.get(`http://example.com`)             .map(result => result.json())             .map(json => {                 dispatch(this.receivefilm(json));             })             .subscribe(e=>sub.unsubscribe());             ... 

so answer no, don't ng2 cleanup after

the http service source, angular's http xhr backend source:

notice how runs "complete" after getting result. means unsubscribes on completion. don't need yourself.

here test validate:

  fetchfilms() {     return (dispatch) => {         dispatch(this.requestfilms());          let observer = this._http.get(`${base_url}`)             .map(result => result.json())             .map(json => {                 dispatch(this.receivefilms(json.results));                 dispatch(this.receivenumberoffilms(json.count));                 console.log("2 isunsubscribed",observer.isunsubscribed);                 window.settimeout(() => {                   console.log("3 isunsubscribed",observer.isunsubscribed);                 },10);             })             .subscribe();         console.log("1 isunsubscribed",observer.isunsubscribed);     }; } 

as expected, can see unsubscribed automatically after getting result , finishing observable operators. happens on timeout (#3) can check status of observable when it's done , completed.

and result

no leak ng2 auto unsubscribes! rubyboy on this..