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patrickarlt/app.js

Created February 26, 2014 02:48
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Robust unique ids in Leaflet
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app.js
var MyMarkerGroup = L.FeatureGroup.extend({
// override the 'getLayerId' function to return your ids rather then leaflets internal ids
getLayerId: function(layer){
return layer.id;
}
getLayersById: function(arrayOfLayerIds){
var layers = [];
// some logic to loop over layers and select them by id
// leaflet maintains layers (markers) in an internal _layers property
for (var i = arrayOfLayerIds.length - 1; i >= 0; i--) {
var id = arrayOfLayerIds[i];
layers.push(this._layers[id]);
}
return layers;
}
});
var markers = new MyMarkerGroup();
var marker = new L.marker(latlng, options);
marker.id = "something"; // assign your id
markers.addLayer(marker); // add your layer
var aMarker = markers.getLayer("something"); // gets marker by id
var someMarkers = markers.getLayersById(["foo", "bar"]); // get markers by their ids
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