Update to angular 8.2

projects/common-map/src/fm-map/services/device-orientation.service.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@angular/core';
+import { Observer, Observable } from 'rxjs';
+
+
+@Injectable()
+export class DeviceOrientationService {
+
+   /**
+   * Tries HTML5 geolocation.
+   *
+   * Wraps the Geolocation API into an observable.
+   *
+   * @return An observable of Bearing
+   */
+  getCurrentBearing(): Observable<number> {
+    return Observable.create((observer: Observer<number>) => {             
+        let sensor = new Magnetometer();
+        sensor.onreading= (ev:Event) => {
+             observer.next(Math.atan2(sensor.y, sensor.x) * (180 / Math.PI));
+        };
+    });
+  }
+
+}