IntegratedMeshLayer

// set the api key to access a protected service
const layer = new FeatureLayer({
  url: serviceUrl,
  apiKey: "YOUR_API_KEY"
});

// send a custom parameter to your special service
let layer = new MapImageLayer({
  url: serviceUrl,
  customParameters: {
    "key": "my-special-key"
  }
});

// while these examples use a SceneLayer, the same pattern can be
// used for other layers that may be loaded from portalItem ids

// loads the third layer in the given Portal Item
let layer = new SceneLayer({
  portalItem: {
    id: "73df987984b24094b848d580eb83b0fb"
  },
  layerId: 2
});

// If not specified, the first layer (layerId: 0) will be returned
let layer = new SceneLayer({
  portalItem: {
    id: "73df987984b24094b848d580eb83b0fb"
  }
});

// Can also be used if URL points to service and not layer
let layer = new SceneLayer({
  url: "https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer",
  layerId: 0  // Notice that the url doesn't end with /2
});

// This code returns the same layer as the previous snippet
let layer = new SceneLayer({
  url: "https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer/layers/0",
  // The layer id is specified in the URL
});

// The layer will not be visible when the view is zoomed in beyond a scale of 1:1,000
layer.maxScale = 1000;

// The layer's visibility is not restricted to a maximum scale.
layer.maxScale = 0;

// The layer will not be visible when the view is zoomed out beyond a scale of 1:3,000,000
layer.minScale = 3000000;

// The layer's visibility is not restricted to a minimum scale.
layer.minScale = 0;

// create the IntegratedMeshLayer
const layer = new IntegratedMeshLayer({ ... })

// create a polygon
const polygon = new Polygon({ ... });

// create the modifications
let modifications = new SceneModifications(
  [
    new SceneModification({geometry: polygon, type: 'replace'})
  ]);

// add the modification to the IntegratedMesh
layer.modifications = modifications;

// While this example uses FeatureLayer, this same pattern can be
// used for other layers that may be loaded from portalItem ids.
const layer = new FeatureLayer({
  portalItem: {  // autocasts as new PortalItem()
    id: "caa9bd9da1f4487cb4989824053bb847"
  }  // the first layer in the service is returned
});

// Set hostname when using an on-premise portal (default is ArcGIS Online)
// esriConfig.portalUrl = "http://myHostName.esri.com/arcgis";

// While this example uses FeatureLayer, this same pattern can be
// used for SceneLayers.
const layer = new FeatureLayer({
  portalItem: {  // autocasts as new PortalItem()
    id: "8d26f04f31f642b6828b7023b84c2188"
  },
  // loads the third item in the given feature service
  layerId: 2
});

// Initialize GeoJSONLayer by referencing a portalItem id pointing to geojson file.
const layer = new GeoJSONLayer({
  portalItem: new PortalItem({
    id: "81e769cd7031482797e1b0768f23c7e1",
    // optionally define the portal, of the item.
    // if not specified, the default portal defined is used.
    // see https://developers.arcgis.com/javascript/latest/api-reference/esri-config.html#portalUrl
    portal: new Portal({
      url: "https://jsapi.maps.arcgis.com/"
    })
  }
});

// This snippet loads a table hosted in ArcGIS Online.
const table = new FeatureLayer({
  portalItem: { // autocasts as esri/portal/PortalItem
    id: "123f4410054b43d7a0bacc1533ceb8dc"
  }
});

// Before adding the table to the map, it must first be loaded and confirm it is the right type.
table.load().then(function() {
  if (table.isTable) {
    map.tables.add(table);
  }
});

// Layer from Scene Service on ArcGIS Server
let sceneLayer = new SceneLayer({
  url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Paris_3D_Local_WSL2/SceneServer/layers/0"
});

// Can also be used if URL points to service and not layer
let layer = new SceneLayer({
  // Notice that the url doesn't end with /0
  url: "https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer",
  layerId: 0
});

// Prints the version to the console - e.g. 1.4, 1.5, etc.
console.log(layer.version.versionString);