Angular - Subscribe to route.queryParams -

i've got in ngoninit

ngoninit(): void {      this.sub = this.route.queryparams.subscribe((params: any) => {         this.data = {...params};         this.stationsservice.getstations(this.data).subscribe((res: any) => {             this.stations = res.data.stations         })     }); } 

and have delete function

deletemass() {     let array: = manipulateselections(this.selected, this.stations);     this.stationsservice.deletestations(array).subscribe((res: any) => {         this.data.random = math.random();         this.router.navigate([], {queryparams: this.data });     }) } 

what i'm doing. every time delete stations create random number change me route make first observable runs again. can suggest better way. seems bad practice.