im trying to create a popup in Openlayers that would open when someone clicks a marker. And the marker is setup like this: new OpenLayers.Feature.Vector() and not with the ordinary marker layer.

The marker is then placed inside another layer vesselLayer.addFeatures([markerLayer])

which is then added to the map: map.addLayer([vesselLayer])

Now, How can i get a popup to show when someone selects one of the markers?

Let it be noted that each vesselLayer has only 1 marker. But there can be a 100 dynamically added vesselLayers to the map. (Made it that way for easy access trough the LayerSwitcher).

I tried reading the docs: http://openlayers.org/dev/examples/select-feature-openpopup.html

But i could not figgure it out.

The error that comes out of the console is saying that it cannot read the property "events" of null.. I double checked the object instantiation and it does get instantiated and the property is a part of the name.

Heres the object logged out right after instantiation.

Object Overview

1 Answer 1


try to use following code.

   vesselLayer.events.register("click", vesselLayer, function(evt){
   popup = new OpenLayers.Popup("chicken",
                   new OpenLayers.Size(200,200),
                   "My Content",


i hope it helps you...

  • Gives me basicly the same error as when i tried using the documentation: Uncaught TypeError: Cannot read property 'events' of null
    – Christer
    Commented Jan 7, 2013 at 12:11
  • The error says everything : of null tells the vesselLayer is not initialized. Have you checked where you do vesselLayer = new OpenLayers.Layer.Markers( "Marks" ); map.addLayer(vesselLayer); ??
    – Magno C
    Commented Jan 7, 2013 at 14:08
  • 2
    By the way : why you need a layer with a single feature for each mark ? Follow @Aragon code to have various features in a unique layer with a popup.
    – Magno C
    Commented Jan 7, 2013 at 14:18
  • So i found out i had taken a wrong approach to this. I was adding Layer upon Layer, which would make one layer overlay another and kinda block the click events. So i created one single layer with just the features. And then using @Aragon 's Code to make it clickable! Thanks :)
    – Christer
    Commented Jan 9, 2013 at 9:18

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