Openlayers write and save a KML based on your map

Question

Is it possible to write and save a KML from OpenLayers? Anyone know of an example of exporting one?

Answer 1

IF you are using Openlayers 3 or 4, you will find that the syntax of previous (2012) answers does not work anymore.

This does:

        function GetKMLFromFeatures(features) {
            var format = new ol.format.KML();
            var kml = format.writeFeatures(features, {featureProjection: 'EPSG:3857'});
            return kml;
        }
        function GetGeoJSONFromFeatures(features) {
            var format = new ol.format.GeoJSON();
            var geoJSON = format.writeFeatures(features, {featureProjection: 'EPSG:3857'});
            return geoJSON;
        }
        function GetFeaturesFromLayer(layer) {
            var source = layer.getSource();
            var features = source.getFeatures();
            return features;
        }