Quiero implementar el manejo de errores. Estoy confundido mucho.

 var x = document.getElementById("demo"); function getLocation() { if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(showPosition, showError); } else { x.innerHTML = "Geolocation is not supported by this browser."; } } function showPosition(position) { x.innerHTML = "Latitude: " + position.coords.latitude + "<br>Longitude: " + position.coords.longitude; } function showError(error) { switch(error.code) { case error.PERMISSION_DENIED: x.innerHTML = "User denied the request for Geolocation." break; case error.POSITION_UNAVAILABLE: x.innerHTML = "Location information is unavailable." break; case error.TIMEOUT: x.innerHTML = "The request to get user location timed out." break; case error.UNKNOWN_ERROR: x.innerHTML = "An unknown error occurred." break; } }

En lugar de mostrar error. ¿Cómo puedo implementar el manejo de errores? ¿Debo usar console.error o throw o throw Error o throw new Error ?