Google Maps V3: Check if marker is present on map?

Question

In Google Maps V3, is there a way to check whether a marker is actually present on the map?

I have markers that vanish when clicked. I'd like some logic to check the present visibility of the marker.

For example:

var start_marker = null; start_marker = new google.maps.Marker({ position: location, map: map, clickable: true }); google.maps.event.addListener(start_marker, 'click', function(event) {   start_marker.setMap(null); });  // ... Later in code: check whether marker is currently visible.  console.log('Type of start_marker is now: ' + typeof(start_marker)); 

I was hoping this would give me a null type when the marker isn't visible, but in fact it's still an Object.

So, how else can I check whether this particular marker is visible on the map?

Thanks!

Answer 1

This one-liner will return true if the marker's position is contained under the current map boundary, and return false if not.

map.getBounds().contains(marker.getPosition()) 

Hope that helps, Cheers!