1) In your Identify Parameters, define the layerIds as only the visible layers on the map for the selected layer
identifyParams.layerIds = myLayer.visibleLayers;
You can do this in the executeIdentifyTask function if your visible layers are goint to change dynamically
2) Set the popup to only show if the identify response returns 1 or more feature
function executeIdentifyTask (event) {
map.infoWindow.hide();
identifyParams.geometry = event.mapPoint;
identifyParams.mapExtent = map.extent;
var deferred = identifyTask
.execute(identifyParams)
.addCallback(function (response) {
// response is an array of identify result objects
// Let's return an array of features.
if (response.length > 0) {
map.infoWindow.show(event.mapPoint);
return arrayUtils.map(response, function (result) {
var feature = result.feature;
var layerName = result.layerName;
feature.attributes.layerName = layerName;
if (layerName === 'Tax Parcels') {
var taxParcelTemplate = new InfoTemplate("",
"${Postal Address} <br/> Owner of record: ${First Owner Name}");
feature.setInfoTemplate(taxParcelTemplate);
}
else if (layerName === 'Building Footprints') {
console.log(feature.attributes.PARCELID);
var buildingFootprintTemplate = new InfoTemplate("",
"Parcel ID: ${PARCELID}");
feature.setInfoTemplate(buildingFootprintTemplate);
}
return feature;
});
}
});
// InfoWindow expects an array of features from each deferred
// object that you pass. If the response from the task execution
// above is not an array of features, then you need to add a callback
// like the one above to post-process the response and return an
// array of features.
map.infoWindow.setFeatures([deferred]);
}
