can't construct a map with empty opts.layers

[slinkp]

If opts.layers == [], you get an error in map construction. This is problematic if you don't want to use any of the provided base layers, eg. you want to instead later call addLayer() and initCenter() yourself.

Fortunately there's a two-line fix for this, just don't call initCenter unless we got opts.layers:

--- a/js/olwidget.js +++ b/js/olwidget.js @@ -279,7 +279,11 @@ olwidget.Map = OpenLayers.Class(OpenLayers.Map, { } if (layers.length > 0) { this.addLayers(layers);

• if (opts.layers.length > 0) {
• // Only if we have some base layers.
• // If not, user is responsible for adding some and calling initCenter. this.initCenter();
• }; } this.selectControl = new OpenLayers.Control.SelectFeature( this.vectorLayers);

[yourcelf]

Thanks, fixed this by instead checking for if (this.baseLayer), so that it's not tied to the options implementation. If that fails to work please open a new issue.