subscribe on route.queryParamMap and route.paramMap causes page loads twice

Question

As depicted here, I use in my app the url:

http://localhost:8080/rooms/lisbon?roomTypes=1

And in ngOnInit I subscibes both:

this._route.data.subscribe(x => { console.log(1);doCommonBiz(); })

this._route.paramMap.subscribe(param => { console.log(2);doCommonBiz(); })

I need to be notified one one of them occured, if any of below routed:

http://localhost:8080/rooms/lisbon?roomTypes=2  
http://localhost:8080/rooms/london?roomTypes=1  
http://localhost:8080/rooms/cologne?roomTypes=3

But my subscriptions fire twice.

My question is how can I be notified only once by being aware of two subsciption?

Why did you subscribe both? I think paramMap give you data what you want — Dhaval, Feb 21 '19 at 14:13

score -1 · Answer 1 · answered Feb 21 '19 at 16:33

-1

After digging some, I found combineLatest is what I am looking for.

answered Feb 21 '19 at 16:33

asdf_enel_hak

1 Answers1