FeatureLayer.fullExtent is null in JS API 4.3

[janjermei]

Hi there, whenever I run the code :

layer.then(function(){

  view.extent = layer.fullExtent;

});

when layer is a FeatureLayer the full Extent is always null.

Is this a bug or a known issue ( can be tested with the sandbox example FeatureLayer)

[ThomasSolow]

Is this the example you're referring to? ArcGIS API for JavaScript Sandbox

I see a fullExtent being set properly once the layer has loaded.

My understanding is that fullExtent is not calculated in the client, rather it is passed from the service.  I would check your service and make sure it has a fullExtent.

If you're building a featureLayer in the client I doubt fullExtent will be calculated automatically.  In this case you may have to calculate it yourself by finding the smallest bounding box that contains all features.

[KristianEkenes · Accepted solution]

The fullExtent of the layer is determined by the service. So someone can publish a layer containing a fullExtent or one without one. If you want to ensure you are zooming to the fullExtent of your data, you can get this on the client by doing the following:

layer.queryExtent()
  .then(function(response){
     view.goTo(response.extent);
  });‍‍‍‍

That will ensure your view zooms to the extent of all features in the layer whether or not a fullExtent is present on the service.