esrijs4kml.js

require([
  "esri/config",
  "esri/Map",
  "esri/views/SceneView",
  "esri/layers/FeatureLayer",
  "esri/layers/GroupLayer",
  "esri/request",
  "dojo/domReady!"
], function(esriConfig, Map, SceneView, FeatureLayer, GroupLayer, esriRequest) {
  
  // you'll need a proxy
  esriConfig.request.proxyUrl = "/proxy/proxy.php";

  var kmlUrl = "https://dl.dropboxusercontent.com/u/2654618/kml/Wyoming.kml";
  var serviceUrl = "//utility.arcgis.com/sharing/kml";
  
  var map = new Map({
    basemap: "streets"
  });

  var view = new SceneView({
    container: "viewDiv",
    map: map,
    zoom: 6,
    center: [-108.663, 42.68]
  });
  
  view.then(function() {
    return esriRequest({
      url: serviceUrl,
      content: {
        url: kmlUrl
      }
    })
  }).then(function(response) {
    // works, but errors on empty features
    /*
    var layers = response.featureCollection.layers;
    var kml = new GroupLayer({
      layers: layers.map(function(x) {
        return new FeatureLayer(x);
      })
    });
    map.add(kml);
    */
    // remove featureSets with empty features
    var layers = response.featureCollection.layers.filter(function(x) {
      return x.featureSet.features.length;
    });
    var kml = new GroupLayer({
      layers: layers.map(function(x) {
        return new FeatureLayer(x);
      })
    });
    map.add(kml);
  });
});