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            If a device supports geolocation, you can use the geolocation
API to obtain the current geographical location of the device. If
the device supports this feature, you can obtain geolocation information.
This information includes the altitude, accuracy, heading, speed,
and timestamp of the latest change in the location.
            
           
            The Geolocation class dispatches
            
             update
            
            events
in response to the device’s location sensor. The
            
             update
            
            event
is a GeolocationEvent object.
            
           
           
           
          
          
           
          
          
          
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