How to cancel a request to receive data?

Question

JavaScript

I have a data loading method in the service

getSpend(months : number[]) {
        return this.http.get("assets/fake/fake-report-spend.json")
            .map((data: Response) => data.json().data)
            .concatMap((array) => Observable.from(array))
            .filter((data: {month: number, spend: number}) => months.indexOf(data.month) != -1)
            .catch((error : any) => Observable.throw(error))
            .delay(2500);
    }

and here is the output

this.reportService.getSpend(this.selectedMonthsKeys)
            .subscribe(
                data => {
                    this.data.push(data.spend);
                },
             )

The point is that the method is called when the user changes the value in select2. And it turns out the data overlay. At me not up to the end the first request fulfills and data from other request at once are superimposed on its place. And I want the previous request to be canceled if it has already partially loaded the data (this.data.push(data.spend)) , then clear them

Answer 1

It's called angular cancel request