Question

Please, I need a help.

I want to check if my infowindow is opened.

For example:

if (infowindow.isOpened)
{
   doSomething()
}

or

if (infowindow.close)
{
   doAnotherthing();
}

I dont have any idea, how to do this

Answer 1

This is an undocumented feature, and is therefore subject to change without notice, however the infoWindow.close() method sets the map on the object to null (this is why infoWindow.open(map, [anchor]) requires that you pass in a Map), so you can check this property to tell if it is currently being displayed:

function isInfoWindowOpen(infoWindow){
    var map = infoWindow.getMap();
    return (map !== null && typeof map !== "undefined");
}

if (isInfoWindowOpen(infoWindow)){
    // do something if it is open
} else {
    // do something if it is closed
}

Update:
Another potentially useful way to write this is to add an isOpen() method to the InfoWindow prototype.

google.maps.InfoWindow.prototype.isOpen = function(){
    var map = this.getMap();
    return (map !== null && typeof map !== "undefined");
}