Geolocation.watchPosition() example snippet doesn't compile

[yzhan94]

Geolocation.watchPosition() example code doesn't compile; running npm run build throws the following errors:

[12:47:46]  Property 'code' does not exist on type 'Geoposition | PositionError'. 
[12:47:46]  Property 'coords' does not exist on type 'Geoposition | PositionError'. 
[12:47:46]  Property 'coords' does not exist on type 'Geoposition | PositionError'. 
[12:47:46]  ngc failed 

I'm using the latest ionic-app-scripts (v 0.0.36).
It can be reproduced using the snippet given in the docs

var subscription = Geolocation.watchPosition()
                              .filter((p) => p.code === undefined) //Filter Out Errors
                              .subscribe(position => {
  console.log(position.coords.longitude + ' ' + position.coords.latitude);
});

A working solution I tried is changing the return type of the watchPosition method from the Union Type Observable<Geoposition | PositionError> to the Intersection Type Observable<Geoposition & PositionError>.

According to the official documentation, in a Union Type, you can only access members that are common to all types in the union; whereas an Intersection Type object will have all the members of all types.

[ihadeed]

thanks

[nalkon]

I'm having the same problem. How do I get the fix?

Tnx.

[dnmd]

While using the latest ionic-native "ionic-native": "^2.2.16", the issue still remains, it's not possible to compile the example snippet. From the logs:

__WEBPACK_IMPORTED_MODULE_0_ionic_native__.a.watchPosition(...).filter is not a function

So I still remove the filter to get it compiled.

[raae]

@dnmd i got the same with 2.2.16, but works with 2.2.15

[ihadeed]

@raae 2.2.16 is the same as 2.2.15 except it has a major fix that is not related to this plugin. You should be using 2.2.16 as 2.2.15 is broken.

[ihadeed]

@dnmd are you importing rxjs/add/operator/filter ?

[raae]

Ok @ihadeed it now works with 2.2.16, it must have been something else then.

[badpenguin]

I'm getting this problem after upgrading ionic-angular from 2.1.0 to 2.2.0

https://forum.ionicframework.com/t/type-observable-geoposition-is-not-assignable-to-type-observable-geoposition-after-upgrading-to-2-2-0/82314

[ihadeed]

@badpenguin thanks, this is because of the Rxjs version. Will push a hotfix soon.