Further Info on Geolocation

Geolocation is a vast API, which is why it was incorporated into the browser as a separate object, rather than with all the other APIs. Other than using getCurrentPosition(), you can use watchPosition(callback) to specify a function to call when the position changes (useful for laptops and devices)

See the below links for learning about more Google Maps:

To use Geolocation:

if ("geolocation" in navigation) {//to detect whether geolocation is supported
  navigator.geolocation.getCurrentPosition(function(position){
    latitude = position.coords.latitude;//gets latitude
    longitude = position.coords.longitude;//gets longitude
  });//gets position once
  
  navigator.geolocation.watchPosition(function(position){
    latitude = position.coords.latitude;//gets latitude
    longitude = position.coords.longitude;//gets longitude
  });//gets position when it changes
}