• Overview
• Using the view
• SceneView navigation
• SceneView navigation with gamepad and 3DConnexion devices
• Programmatic navigation
• Viewing modes
• Supported Coordinate Systems
• Using elevation data

Overview

A SceneView displays a 3D view of a Map or WebScene instance using WebGL. To render a map and its layers in 2D, see the documentation for MapView. For a general overview of views, see View.

For a map to be visible to the user in the DOM, a SceneView must have both a valid Map instance and a DOM element with a non-zero height and width in which to render. Note that there must be valid data in the map, such as operational layers or a basemap with base layers, before the view will begin rendering the map.

// Create a basic SceneView instance with a basemap and world elevation
const view = new SceneView({
  // An instance of Map or WebScene
  map: new Map({
    basemap: "hybrid"
  }),

  // The id of a DOM element (may also be an actual DOM element)
  container: "viewDiv"
});

Known Limitations

The number of features that can be rendered in a SceneView varies depending on the complexity of each feature's geometry and symbol.

Point layers with a large number of features can be loaded and visualized in a SceneView. The features are dynamically loaded and displayed as you navigate the scene. For optimal performance, the number of displayed features is adjusted based on the complexity of the symbol and device capability. As a result, some features may not be visible in the view.

For lines and polygons all the features are displayed in the view, independent of the point symbol or the device. For best performance, we recommend to limit the number of features to 2,000.

Read more

Using the view

A SceneView may not be immediately ready for display after it has been constructed. For example, map data may need to be loaded first to determine the spatialReference of the view, or the DOM container may not yet have a non-zero size. Many of the view methods (such as hitTest or goTo) need the view to be ready before they can be used.

// create a SceneView instance (for 3D viewing)
const view = new SceneView({
  map: new Map({
    basemap: "topo"
  }),

  container: "viewDiv"
});


view.when(function() {
      // SceneView is now ready for display and can be used. Here we will
      // use goTo to view a particular location at a given zoom level, camera
      // heading and tilt.
      view.goTo({
        center: [-112, 38],
        zoom: 13,
        heading: 30,
        tilt: 60
      })
    })
    .catch(function(err) {
      // A rejected view indicates a fatal error making it unable to display,
      // this usually means that WebGL is not available, or too old.
      console.error("SceneView rejected:", err);
    });

For live examples of view.when(), see the 2D overview map in SceneView and Toggle elevation layer samples.

SceneView navigation

The view can be navigated programmatically via goTo() and the view properties or interactively with mouse, keyboard or touch inputs. SceneView navigation is enabled by defaults, and includes the mouse, keyboard and touch interactions as described in the table below. Touch interactions are working on any touch enabled monitor or laptop screen.

Action	SceneView behavior
Drag	Pan
Double-click	Zoom in at the cursor
Scroll forward	Zoom in at the cursor
Scroll backward	Zoom out at the center of the view
Right-click+Drag	3D-rotate around the center of the view
Arrow Keys	Nudge the view left, right, up, or down (only supported in global scene)
B + Left-click+Drag	3D-rotate around the camera's position
P	Move the camera to look perpendicular to the data displayed in the view
N	Adjust the SceneView to point north
J	Move down, closer to the view (only supported in global scene)
U	Move up, higher from the view (only supported in global scene)
Drag with one or multiple fingers	Pan
Double-tap with one finger	Zoom in at the finger position
Two finger pinch in/out	Zoom out/in
Move two fingers in clockwise or counterclockwise direction	Rotate
Drag two fingers up or down the screen	Tilt the scene

To disable SceneView navigation, you must call the stopPropagation() method on the event objects of the pointer or gesture events that trigger the navigation.

See our samples on disabling view navigation for examples.

SceneView navigation with Gamepad and 3DConnexion devices

Gamepad and 3Dconnexion devices, like the SpaceMouse, can be used for navigation when view.navigation.gamepad.enabled is set to true(default). Please see GamepadInputDevice for supported devices.

Gamepad Action	SceneView behavior
Left Trigger	Descend
Right Trigger	Ascend
Left Stick	Pan
Right Stick	3D-rotate around the center of the view

Action Image	SpaceMouse Action	SceneView behavior
	Push (left/right/forward/backward)	Pan
	Pull up	Ascend
	Push down	Descend
	Rotate clockwise	Rotate the view clockwise
	Rotate counterclockwise	Rotate the view counterclockwise
	Tilt	Tilt the scene

To disable gamepad navigation, you can set view.navigation.gamepad.enabled to false.

Programmatic navigation

Traditional 2D mapping properties, such as scale, zoom, center and extent do not always work well in 3D. For example, a map's scale is not clear when viewed in the context of a globe. The SceneView therefore supports these properties on a best effort basis, with certain limitations (see the documentation of individual properties for more information).

// Compatibility with 2D viewing properties, such as center and zoom, allows
// convenient transitioning from the familiar use of the 2D MapView to the
// use of the SceneView for 3D viewing.
const view = new SceneView({
  map: new Map({
    basemap: "satellite"
  }),

  container: "viewDiv",

  // Sets the center point of the view at a specified lon/lat
  center: [-112, 38],

  // Sets the zoom LOD to 13
  zoom: 13
});

The nature of 3D viewing includes oblique views, z-values, and rotation, all of which add complexity to defining what is visible in the view. In contrast to 2D MapView, which are primarily defined by an extent, or center and scale, the primary view specification of the SceneView is a Camera instance. The camera is defined by a 3D position, heading and tilt. See the documentation of Camera for more details.

Because some view properties overlap (e.g. center and camera), there is a set priority in which these properties are applied during construction of the view (until the view becomes ready). The following table describes which properties have priority during view construction (properties that are overridden will have no effect during construction).

Property	Overrides
camera	viewpoint, extent, center, scale, zoom
viewpoint	extent, center, scale, zoom
extent	center, scale, zoom
scale	zoom

It can be difficult to define the camera for viewing data at a particular location. The goTo method provides a convenient way to set the view's camera based on data (geometries, graphics) you want to view and from any perspective using heading, tilt, scale or zoom. Additionally, goTo will provide a smooth transition to the new location of the view by default.

// go to a location specified in geographic coordinates,
// from a 45 degree angle.
view.goTo({
  center: [-112, 38],
  heading: 45
});

// go to view all the graphics in view.graphics, while northing the
// the camera and tilting it to 60 degrees
view.goTo({
  target: view.graphics,
  heading: 0,
  tilt: 60
});

// Set the view to show an extent at a -20 degree heading, disabling the
// animated transition
view.goTo({
  target: new Extent(694942, 5596444, 1284090, 6163926, SpatialReference.WebMercator),
  heading: -20
}, {
  animate: false
});

Viewing modes

The SceneView supports two different viewing modes, global (left picture above) and local (right picture above), specified by the viewingMode property. Global scenes render the earth as a globe, while local scenes render the surface on a flat plane. Local mode allows for navigation and feature display in a localized or clipped area. In both viewing modes the users may navigate the camera below the ground surface by setting the esri/Ground#navigationConstraint#type to none.

The viewing mode (if not explicitly set by the user) is determined based on the spatial reference of the view. If the spatial reference is either Web Mercator or WGS84, then the viewingMode will default to global. For any other spatial reference the viewingMode will default to local.

Supported coordinate systems

The SceneView supports following coordinate systems in a global scene:

• WGS84 or WebMercator
• Noncached layers with any spatial reference since they will be reprojected to the scene spatial reference

In a local scene the following coordinate systems are supported:

• Any Projected Coordinate System
• Noncached layers with any spatial reference since they will be reprojected to the scene spatial reference

Using elevation data

The SceneView will use elevation layers from the Map.ground as sources for elevation when rendering the ground surface. Similar to the basemap, the ground can be initialized with a well-known name, which creates it with a known set of elevation layers.

const view = new SceneView({
  map: new Map({
    basemap: "satellite",

    // A ground preset containing a single elevation layer, sourced from
    // https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer
    ground: "world-elevation"
  },

  container: "viewDiv"
});

Local elevation layers can be added to the ground.layers to merge multiple elevation sources into a single surface. See 3D Map With Elevation Services for an example.

See also:

• Intro to SceneView

• Sample - SceneLayer

• Sample - Create a local scene

• Sample - Easy navigation

• Sample - Elevation Info

• Sample - Toggle basemap elevation

• Sample - Environment

• Sample - Custom background for SceneView

• Sample - Detect WebGL support

• MapView
• Map

Constructors

new SceneView(properties)

Parameter:

properties Object optional See the properties for a list of all the properties that may be passed into the constructor.

Example:

// Typical usage
const view = new SceneView({
  // ID of DOM element containing the view
  container: "viewDiv",
  // Map/WebScene object
  map: new Map()
});

Property Overview

Property Details

allLayerViewsCollection<LayerView> inherited

Collection containing a flat list of all the created LayerViews related to the basemap, operational layers, and group layers in this view.

See also:

• LayerView

alphaCompositingEnabledBoolean

Since: ArcGIS API for JavaScript 4.8

Allows the view to be partially or fully transparent when composited with the webpage elements behind it. This property can only be set once at construction time. When alpha compositing is enabled, web scenes are less performant. It's important to set this property to true only when you need to apply transparency on the view.

Default Value:false

Example:

// create a view with a fully transparent background
const view = new SceneView({
 map: map,
 alphaCompositingEnabled: true,
 environment: {
   background: {
     type: "color",
     color: [0, 0, 0, 0]
   },
   starsEnabled: false,
   atmosphereEnabled: false
 }
})

animationViewAnimation inherited

Represents an ongoing view animation initialized by goTo(). You may watch this property to be notified when the view's extent changes .

See also:

• goTo()

breakpointsObject

A convenience property used for defining the breakpoints on the height and width of the view. The sizes specified here determine the values of the widthBreakpoint and heightBreakpoint properties depending on the view's size.

Setting up breakpoints can aid in responsive app design. It does this by watching width and height breakpoints. This is helpful as it removes the need for multiple @media calls. Instead of listening for the view's size and/or resizes property, you can set up a watch handler for either the widthBreakpoint or heightBreakpoint properties of the view.

Please refer to the styling guide for additional information on working with this.

Properties:

xsmall Number optional Default Value:544 Sets the xsmall breakpoint in pixels used by widthBreakpoint and heightBreakpoint. If the view's height or width is smaller than this value, then the value of widthBreakpoint or heightBreakpoint will be xsmall.

small Number optional Default Value:768 Sets the small breakpoint in pixels used by widthBreakpoint and heightBreakpoint. If the view's height or width is between this value and the value of the xsmall property, then the value of widthBreakpoint or heightBreakpoint will be small.

medium Number optional Default Value:992 Sets the medium breakpoint in pixels used by widthBreakpoint and heightBreakpoint. If the view's height or width is between this value and the value of the small property, then the value of widthBreakpoint or heightBreakpoint will be medium.

large Number optional Default Value:1200 Sets the large breakpoint in pixels used by widthBreakpoint and heightBreakpoint. If the view's height or width is between this value and the value of the medium property, then the value of widthBreakpoint or heightBreakpoint will be large.

xlarge Number optional Sets the xlarge breakpoint in pixels used by widthBreakpoint and heightBreakpoint. If the view's height or width is greater than the value of the large property, then the value of widthBreakpoint or heightBreakpoint will be xlarge.

See also:

• Sample: Responsive apps using CSS

• MDN Web docs: Media Queries

Example:

// Instead of watching the size or resizing properties
view.watch(size)
view.watch(resizing)

// Set up a watch handle for breakpoint
view.watch("widthBreakpoint",function(breakpoint){
  switch (breakpoint) {
    case "xsmall":
    // do something
      break;
    case "small":
    case "medium":
    case "large":
    case "xlarge":
    // do something else
      break;
    default:
  }
});

cameraCameraautocast

The observation point from which the visible portion (or perspective) of the SceneView is determined. Contains properties including the elevation, tilt, and heading (in degrees) of the current view. Setting the camera immediately changes the current view. For animating the view, see goTo().

When set in the constructor, this property overrides the viewpoint, extent, center, scale, and zoom properties.

The camera property contains an internal reference which may be modified in the future. To persist or modify the camera, create a clone using camera.clone().

Z-values defined in a geographic or metric coordinate system are expressed in meters. However, in local scenes that use a projected coordinate system, vertical units are assumed to be the same as the horizontal units specified by the service.

See also:

• goTo()

Examples:

// Initializes the view at the given (x, y, z) position with a heading of 95 degrees.
// The position of the camera is a Point which will autocast in the sample
// below. Note that the default Point spatial reference is WGS84 which
// will only work if the SceneView has a Web Mercator or WGS84 spatial
// reference. For other spatial references, create a new position Point
// with an explicit spatial reference.
const view = new SceneView({
  camera: {
    position: [
       -122, // lon
         38, // lat
      50000  // elevation in meters
    ],

    heading: 95
  }
});

// Initializes the view at the given position with a tilt of 65 degrees
const view = new SceneView({
  camera: {
    position: {
      x: -100, // lon
      y: 45,   // lat
      z: 10654 // elevation in meters
    },

    tilt: 65
  }
});

// Clone the camera to modify its properties
const camera = view.camera.clone();

// Set new values for heading and tilt
camera.heading = 180;
camera.tilt = 45;

// Set the new properties on the view's camera
view.camera = camera;

// Set the view's camera to a new position, heading and tilt with the goTo() method
view.goTo({
  target: [-122, 38, 50000],
  heading: 180,
  tilt: 45
});

centerPointautocast

Autocasts from Number[]|Object

Represents the view's center point; when setting the center you may pass a Point instance or an array of numbers representing at longitude/latitude pair ([-100.4593, 36.9014]). Setting the center immediately changes the current view. For animating the view, see goTo().

If set in the constructor, this property will be ignored if the viewpoint, camera, or extent properties are also set in the constructor.

The center property contains an internal reference which may be modified in the future. To persist or modify the center, create a clone using center.clone().

Z-values defined in a geographic or metric coordinate system are expressed in meters. However, in local scenes that use a projected coordinate system, vertical units are assumed to be the same as the horizontal units specified by the service.

See also:

• goTo()

Examples:

// Sets the initial center point of the view to long/lat coordinates
const view = new SceneView({
  center: [-112, 38]
});

// Updates the view's center point to a pre-determined Point object
view.center = new Point({
  x: 12804.24,
  y: -1894032.09,
  z: 12000,

  spatialReference: 2027
});

// view.center needs to be set (not modified in place) to have an effect.
// To modify only the center.x, first clone the current center, modify
// the .x property and then set it on the view.
const center = view.center.clone();

// Offset the center 1km to the east
center.x += 1000;

view.center = center;

clippingAreaExtentautocast

Represents an optional clipping area used to define the visible extent of a local scene. If defined, only data (including the basemap) within the area will be displayed.

The clippingArea property only applies to local scenes.

The clippingArea property contains an internal reference which may be modified in the future. To persist or modify the clippingArea, create a clone using clippingArea.clone().

See also:

• viewingMode

• Sample - Create a local scene

Example:

const extent = view.extent.clone();

// Expand the extent in place, reducing it to 50% of its original size
// and set it as the clippingArea
view.clippingArea = extent.expand(0.5);

constraintsAccessorautocast

Specifies constraints for Camera tilt and altitude that may be applied to the SceneView. See the object specification table below for details.

Properties:

altitude Accessor optional Specifies a constraint on the minimum and maximum allowed camera altitude. Specification: min Number optional Default Value:-∞ The minimum allowed camera altitude (in meters). max Number optional Default Value:EARTH_RADIUS * 4 The maximum allowed camera altitude (in meters).

clipDistance Accessor optional Specifies the near and far webgl clip distances. Specification: near Number optional The near clip distance. far Number optional The far clip distance. mode String optional Default Value:auto Specifies the mode of the constraint which is either auto or manual. In auto mode, the near and far clip distance values are automatically determined. In manual mode, the near and far clip distance values are user defined, constant values. Note that the mode automatically changes to manual whenever the near or far property is set.

collision Object optional When enabled, prevents the user from navigating below the surface in a local SceneView. This property is deprecated, please use Ground instead. Deprecated since version 4.8 Specification: enabled Boolean optional Default Value:true Set to false to permit the user to navigate below the surface in a local SceneView.

tilt Accessor optional Specifies a constraint on the amount of allowed tilting of the view. Specification: max Number optional Specifies the maximum amount of tilt (in degrees) allowed in the view and may range from 0.5 to 179.5 degrees. mode String optional Default Value:auto Specifies the mode of the constraint. There are two possible values: auto or manual. In auto mode, the maximum tilt value is automatically determined based on the altitude of the view camera. In manual mode, the maximum tilt value is a user defined, constant value. Note: The mode automatically changes to manual whenever the max property is set.

See also:

• Sample - local scene

containerHTMLDivElementautocast inherited

Autocasts from String

The id or node representing the DOM element containing the view. This is typically set in the view's constructor.

Examples:

// Sets container to the DOM id
var view = new MapView({
  container: "viewDiv"  // ID of the HTML element that holds the view
});

// Sets container to the node
var viewNode = document.getElementById("viewDiv");
var view = new SceneView({
  container: viewNode
});

declaredClassStringreadonly inherited

Since: ArcGIS API for JavaScript 4.7

The name of the class. The declared class name is formatted as esri.folder.className.

environmentAccessor

Specifies various properties of the environment's visualization in the view. The SceneView will redraw automatically when any property of environment changes.

const view = new SceneView({
  map: map,
  container: "viewDiv"
});

// Set the sun position to reflect the current time
view.environment.lighting.date = Date.now();

// Disable automatic lighting updates by camera tracking
view.environment.lighting.cameraTrackingEnabled = true;

// Set a background color
const view = new SceneView({
  container: "view",
  map: map,
  environment: {
    background: {
      type: "color",
      color: [255, 252, 244, 1]
    },
    starsEnabled: false,
    atmosphereEnabled: false
  }
});

Properties:

background Background optional Specifies how the background of the scene (which lies behind sky, stars and atmosphere) should be displayed. By default this is simply a single, fully opaque, black color. Currently ColorBackground is the only type of background supported.

lighting Accessor optional Lighting conditions of the scene. Specification: date Date optional Default Value:new Date("March 15, 2015 12:00:00") The current date and time of the simulated sun. directShadowsEnabled Boolean optional Default Value:false Indicates whether to show shadows cast by the sun. Shadows are only displayed for real world 3D objects. Terrain doesn't cast shadows. In local scenes at small zoom levels, shadows are not displayed. ambientOcclusionEnabled Boolean optional Default Value:false Indicates whether to show ambient occlusion shading. cameraTrackingEnabled Boolean optional Default Value:true Indicates whether the date and time of the simulated sun is automatically updated to maintain the current time of day while the camera changes.

atmosphereEnabled Boolean optional Indicates whether atmosphere visualization is enabled.

atmosphere Accessor optional Atmosphere conditions of the scene. Specification: quality String optional Default Value:low Indicates the quality of the atmosphere visualization. The quality of the atmosphere may have a significant impact on performance. This setting does not have any effect in local scenes. Known Value Example low high

starsEnabled Boolean optional Default Value:true Indicates whether stars visualization is enabled.

extentExtentautocast

The extent represents the visible portion of a map within the view as an instance of Extent. Setting the extent immediately changes the view without animation. To animate the view, see goTo().

Rather than using extent to change the visible portion of the map in a SceneView, you should use camera since it easily allows you to define the heading, elevation and tilt of the observation point from which the view's perspective is created.

When set in the constructor, this property overrides the center, scale, and zoom properties. This property will be ignored if the viewpoint or camera are also set in the constructor.

The extent property contains an internal reference which may be modified in the future. To persist or modify the extent, create a clone using extent.clone().

Z-values defined in a geographic or metric coordinate system are expressed in meters. However, in local scenes that use a projected coordinate system, vertical units are assumed to be the same as the horizontal units specified by the service.

Default Value:null

See also:

• camera
• goTo()

focusedBooleanreadonly inherited

Since: ArcGIS API for JavaScript 4.7

Indicates if the browser focus is on the view.

graphicsCollection<Graphic> inherited

Allows for adding graphics directly to the default graphics in the View.

See also:

• Graphic
• GraphicsLayer

• Intro to graphics

Examples:

// Adds a graphic to the View
view.graphics.add(pointGraphic);

// Removes a graphic from the View
view.graphics.remove(pointGraphic);

groundViewGroundViewreadonly inherited

Since: ArcGIS API for JavaScript 4.7

The view for the ground of the map.

heightNumberreadonly inherited

The height of the view in pixels read from the view container element.

The view container needs to have a height greater than 0 to be displayed.

Default Value:0

heightBreakpointString

A convenience property indicating the general size of the view's height. This value is determined based on where the view's height falls in the ranges defined in the breakpoints property. See the table below for a list of possible values. Use the breakpoints property to override the default thresholds.

Please refer to the styling guide for additional information on working with this.

Possible Value	Description	Default thresholds (pixels)
xsmall	The height of the view is smaller than the value set in the xsmall breakpoint.	< 545
small	The height of the view is between the values set in the xsmall and small breakpoints.	545 - 768
medium	The height of the view is between the values set in the small and medium breakpoints.	769 - 992
large	The height of the view is between the values set in the medium and large breakpoints.	993 - 1200
xlarge	The height of the view is larger than the value set in the large breakpoint.	> 1200

See also:

• Sample: Responsive widgets

• Sample: Responsive apps using CSS

Example:

view.watch("heightBreakpoint", function(newVal){
  if (newVal === "xsmall"){
    // clear the view's default UI components if
    // app is used on a mobile device
    view.ui.components = [];
  }
});

highlightOptionsObjectautocast

Since: ArcGIS API for JavaScript 4.4

Options for configuring the highlight. Use the highlight method on the appropriate LayerView to highlight a feature.

Properties:

color Color optional Default Value:#00ffff Autocasts from Object|Number[]|String The color of the highlight.

haloOpacity Number optional Default Value:1 The opacity of the highlight halo. This will be multiplied with the opacity specified in color.

fillOpacity Number optional Default Value:0.25 The opacity of the fill (area within the halo). This will be multiplied with the opacity specified in color.

See also:

• highlight()

• Sample: Highlight SceneLayer

• Sample: Highlight point features

Example:

const view = new SceneView({
  map: map,
  highlightOptions: {
    color: [255, 255, 0, 1],
    haloOpacity: 0.9,
    fillOpacity: 0.2
  }
});

inputInputreadonly inherited

Since: ArcGIS API for JavaScript 4.9

Options to configure input handling of the View.

Example:

// Make gamepad events to emit independently of focus.
view.input.gamepad.enabledFocusMode = "none";

interactingBooleanreadonly inherited

Indication whether the view is being interacted with (for example when panning).

Default Value:false

layerViewsCollection<LayerView> inherited

A collection containing a hierarchical list of all the created LayerViews of the operational layers in the map.

See also:

• LayerView

mapMap inherited

An instance of a Map object to display in the view. A view may only display one map at a time. On the other hand, one Map may be viewed by multiple MapViews and/or SceneViews simultaneously.

This property is typically set in the constructor of the MapView or SceneView. See the class description for examples demonstrating the relationship between the map and the view.

navigationNavigationreadonly inherited

Since: ArcGIS API for JavaScript 4.9

Options to configure the navigation behavior of the View.

Example:

//disable gamepad navigation
view.navigation.gamepad.enabled = false;

orientationStringreadonly

A convenience property indicating the view's orientation. See the table below for a list of possible values.

Please refer to the styling guide for additional information on working with this.

Possible Value	Description
landscape	The width of the view is greater than its height.
portrait	The width of the view is equal to or smaller than its height.

paddingObject inherited

Use the padding property to make the center, and extent, etc. work off a subsection of the full view. This is particularly useful when layering UI elements or semi-transparent content on top of portions of the view. See the view padding sample for an example of how this works.

Properties:

left Number optional The left padding (in pixels).

top Number optional The top padding (in pixels).

right Number optional The right padding (in pixels).

bottom Number optional The bottom padding (in pixels).

Default Value:{left: 0, top: 0, right: 0, bottom: 0}

See also:

• Sample - View padding

popupPopupautocast inherited

A Popup object that displays general content or attributes from layers in the map.

The view has a default instance of Popup with predefined styles and a template for defining content. The content in this default instance may be modified directly in the popup's content or in a layer's PopupTemplate.

You may create a new Popup instance and set it to this property to customize the style, positioning, and content of the popup in favor of using the default popup instance on the view.

In addition, if wanting to prevent any popups from opening, use the syntax below:

Example:

view.popup = null;

qualityProfileString

SceneView can draw scenes in three different quality modes: high, medium and low.

The low quality profile significantly increases performance on slower browsers and devices by reducing the memory limit and the visual quality in the following aspects:

• Map resolution
• Scene layer detail level
• Anti-aliasing (edge smoothing)

The high and medium quality profiles only differ in the maximum amount of memory which the view is allowed to use. A higher memory limit improves quality in complex web scenes with many layers, but can have a negative impact on drawing performance and stability.

The default value is based on the detected browser:

• low for Internet Explorer 11 and certain mobile devices
• medium for any other browser

Overriding the default value is best done in the constructor (see example below). If the value is modified after construction, only a subset of the quality aspects are affected.

Example:

const view = new SceneView({
  qualityProfile: "high"
});

readyBooleanreadonly inherited

When true, this property indicates whether the view successfully satisfied all dependencies, signaling that the following conditions are met.

• The view has a map. If map is a WebMap or a WebScene, then the map or scene must be loaded.
• The view has a container with a size greater than 0.
• The view has a spatialReference.

When a view becomes ready it will resolve itself and invoke the callback defined in when() where code can execute on a working view. Subsequent changes to a view's readiness would typically be handled by watching view.ready and providing logic for cases where the map or container change.

Default Value:false

See also:

• when()

resizingBooleanreadonly inherited

Indicates if the view is being resized.

Default Value:false

resolutionNumberreadonly inherited

Since: ArcGIS API for JavaScript 4.9

Represents the current value of one pixel in the unit of the view's spatialReference. The value of resolution is calculated by dividing the view's extent width by its width.

scaleNumber

Represents an approximation of the map scale at the center of the view. Setting the scale immediately changes the current view. For animating the view, see goTo().

When set in the constructor, this property overrides the zoom property. This property will be ignored if the viewpoint, camera, or extent properties are also set in the constructor.

See also:

• goTo()

Example:

// Set the approximate map scale at the center the view to 1:24,000
view.scale = 24000;

sizeNumber[]readonly inherited

An array containing the width and height of the view in pixels, e.g. [width, height].

spatialReferenceSpatialReferenceautocast inherited

The spatial reference of the view. This indicates the Projected Coordinate System or the Geographic Coordinate System used to locate geographic features in the map. In a SceneView the following supported coordinate systems are available.

The spatial reference can either be set explicitly or automatically derived from the following:

• In the case of a SceneView, if the map is a WebScene instance, the WebScene.initialViewProperties.spatialReference is used.
• In all other cases, the spatial reference is derived from the first layer that loads in this order:
  • map.basemap.baseLayers
  • map.layers
  • map.ground.layers

When using an Esri basemap, the default spatial reference is Web Mercator Auxiliary Sphere.

Default Value:null

stationaryBooleanreadonly inherited

Indication whether the view is animating, being interacted with or resizing.

Default Value:true

suspendedBooleanreadonly inherited

Indicates if the view is visible on the page. Is true if the view has no container, a height or width equal to 0, or the CSS visibility is hidden.

Default Value:true

typeStringreadonly inherited

The type of the view is either 2d (indicating a MapView) or 3d (indicating a SceneView).

uiDefaultUIautocast inherited

Exposes the default widgets available in the view and allows you to toggle them on and off. See DefaultUI for more details.

Examples:

var toggle = new BasemapToggle({
  view: view,
  nextBasemap: "hybrid"
});
// Adds an instance of BasemapToggle widget to the
// top right of the view.
view.ui.add(toggle, "top-right");

// Moves the zoom and BasemapToggle widgets to the
// bottom left of the view.
view.ui.move([ "zoom", toggle ], "bottom-left");

// Removes all the widgets from the bottom left of the view
view.ui.empty("bottom-left");

// Removes the compass widget from the view
view.ui.remove("compass");

updatingBooleanreadonly inherited

Indicates whether the view is being updated by additional data requests to the network, or by processing received data.

Default Value:false

viewingModeString

The viewing mode (local or global). Global scenes render the earth as a sphere. Local scenes render the earth on a flat plane and allow for navigation and feature display in a localized or clipped area. Users may also navigate the camera of a local scene below the surface of a basemap.

Value	Example	Description
global		Global scenes allow the entire globe to render in the view, showing the curvature of the earth.
local		Local scenes render the earth on a flat surface. They can be constrained to only show a "local" area by setting the clippingArea property. Local scenes also allow for displaying and exploring data that would otherwise be hidden by the surface of the earth.

Depending on the viewing mode different supported coordinate systems are available.

Default Value:global

See also:

• clippingArea

• Sample - Create a local scene

viewpointViewpointautocast

Represents the current view as a Viewpoint or point of observation on the view. In SceneViews, camera should be used in favor of viewpoint for watching or changing the point of view. Setting the viewpoint immediately changes the current view. For animating the view, see goTo().

When set in the constructor, this property overrides the extent, center, scale, and zoom properties. This property will be ignored if camera is also set in the constructor.

The viewpoint property contains an internal reference which may be modified in the future. To persist or modify the viewpoint, create a clone using viewpoint.clone().

See also:

• goTo()

widthNumberreadonly inherited

The width of the view in pixels read from the view container element.

The view container needs to have a width greater than 0 to be displayed.

Default Value:0

widthBreakpointString

A convenience property indicating the general size of the view's width. This value is determined based on where the view's width falls in the ranges defined in the breakpoints property. See the table below for a list of possible values. Use the breakpoints property to override the default thresholds.

Please refer to the styling guide for additional information on working with this.

Possible Value	Description	Default thresholds (pixels)
xsmall	The width of the view is smaller than the value set in the xsmall breakpoint.	< 545
small	The width of the view is between the values set in the xsmall and small breakpoints.	545 - 768
medium	The width of the view is between the values set in the small and medium breakpoints.	769 - 992
large	The width of the view is between the values set in the medium and large breakpoints.	993 - 1200
xlarge	The width of the view is larger than the value set in the large breakpoint.	> 1200

See also:

• Sample: Responsive widgets

• Sample: Responsive apps using CSS

Example:

view.watch("widthBreakpoint", function(newVal){
  if (newVal === "xsmall"){
    // clear the view's default UI components if
    // app is used on a mobile device
    view.ui.components = [];
  }
});

zoomNumber

Represents the level of detail (LOD) at the center of the view. Setting the zoom immediately changes the current view. For animating the view, see goTo().

Setting this property in conjunction with center is a convenient way to set the initial extent of the view.

If set in the constructor, this property will be ignored if the viewpoint, camera, extent, or scale properties are also set in the constructor.

See also:

• goTo()

Examples:

view.zoom = 3;  // Sets the LOD to 3 (small map scale)
view.zoom = 18; // Sets the LOD to 18 (large map scale)

// Set the zoom level and center in the constructor
const view = new SceneView({
  zoom: 10,
  center: [-120, 34],
  map: map
});

Method Overview

Method Details

focus()inherited

Since: ArcGIS API for JavaScript 4.5

Sets the focus on the view.

goTo(target, options){Promise}

Sets the view to a given target. The target parameter can be one of the following:

• [longitude, latitude] pair of coordinates
• Geometry (or array of Geometry[])
• Graphic (or array of Graphic[])
• Viewpoint
• Camera
• Object with a combination of target, center, scale, position, heading and tilt properties (with target being any of the types listed above). The center property is provided as a convenience to animate the SceneView.center and is the equivalent of specifying the target with the center Point. The target must be provided in the spatial reference of the view.

This function returns a promise which resolves as soon as the new view has been set to the target. If the transition is animated, then the ongoing animation can be obtained using SceneView.animation.

If the given target is far away from the current camera position, then heading and tilt will be automatically set to their neutral values (facing north, looking top down). Tilt and heading can always be explicitly set to override this behavior.

Parameters:

target Number[]|Geometry|Geometry[]|Graphic|Graphic[]|Viewpoint|Camera|Object The target location/viewpoint to go to. When using an object for target, use the properties in the table below. Specification: target Number[]|Geometry|Geometry[]|Graphic|Graphic[]|Viewpoint|Camera optional The target of the animation. center Number[]|Point optional The SceneView.center to go to. scale Number optional The SceneView.scale to go to. zoom Number optional The final zoom value to go to. heading Number optional The Camera.heading to go to. tilt Number optional The Camera.tilt to go to. position Point optional The Camera.position to go to.

options Object optional View transition options. Specification: animate Boolean optional Default Value: true Indicates if the transition to the new view should be animated. If set to false, speedFactor, duration, maxDuration, and easing properties are ignored. speedFactor Number optional Default Value: 1 Increases or decreases the animation speed by the specified factor. A speedFactor of 2 will make the animation twice as fast, while a speedFactor of 0.5 will make the animation half as fast. Setting the speed factor will automatically adapt the default maxDuration accordingly. duration Number optional Set the exact duration (in milliseconds) of the animation. Note that by default, animation duration is calculated based on the time required to reach the target at a constant speed. Setting duration overrides the speedFactor option. Note that the resulting duration is still limited to the maxDuration. maxDuration Number optional Default Value: 8000 The maximum allowed duration (in milliseconds) of the animation. The default maxDuration value takes the specified speedFactor into account. easing String|EasingFunction optional The easing function to use for the animation. This may either be a preset (named) function, or a user specified function. Supported named presets are: linear, in-cubic, out-cubic, in-out-cubic, in-expo, out-expo, in-out-expo, in-out-coast-quadratic. See easing functions for graphical representations of these functions. By default, animations that are less than 1000 ms use the out-expo easing function; longer animations use the in-out-coast-quadratic easing function.

Returns:

Type	Description
Promise	A promise that resolves when the view is set to the target.

See also:

• Sample - SceneView goTo()

Examples:

view.goTo({
  center: [-126, 49],
  heading: 180, // set the heading to point South
  tilt: view.camera.tilt, // maintain tilt value
})

// go to a location defined by a Camera object
const cam = new Camera({
  position: new Point({
    x: -100.23, // lon
    y: 65,      // lat
    z: 10000,   // elevation in meters
  }),

  heading: 180, // facing due south
  tilt: 45      // bird's eye view
});

view.goTo(cam);

// go to a point using center, zoom, tilt, and heading
view.goTo({
  center: [-126, 49],
  zoom: 13,
  tilt: 75,
  heading: 105
});

// goTo returns a Promise which resolves when the animation has finished.
// This promise may be chained to create a sequence of animations.
view.goTo(graphic1)
    .then(function() {
      return view.goTo(graphic2);
    })
    .then(function() {
      return view.goTo(graphic3);
    });

// goTo returns a Promise which resolves when the animation has finished.
// This promise may be chained to create a sequence of animations.
view.goTo(graphic1)
    .then(function() {
      return view.goTo(graphic2);
    })
    .then(function() {
      return view.goTo(graphic3);
    });

hasEventListener()

Indicates whether there is an event listener on the instance that matches the provided event name.

hitTest(screenPoint){Promise<HitTestResult>}

Returns the topmost feature from each layer that intersects the specified screen coordinates. The following layer types will return a result if a hit is made on an intersecting feature: GraphicsLayer, FeatureLayer, CSVLayer, GeoRSSLayer, KMLLayer, and StreamLayer.

Draped graphics (i.e. graphics in layers where the elevation mode is on-the-ground) are currently not returned from this method, even when they intersect the input screen point.

When the ground surface is hit, but no graphic is found, then the result of hitTest will be a single object with its mapPoint set to the point on the surface that was hit, but its graphic will be set to null.

Parameters:

screenPoint Object The screen coordinates of the click on the view. Specification: x Number The horizontal screen coordinate of the click on the view. y Number The vertical screen coordinate of the click on the view.

Returns:

Type	Description
Promise<HitTestResult>	When resolved, returns an object containing the graphics (if present) that intersect the given screen coordinates.

See also:

• Sample: Access features with click events

Example:

// Get the screen point from the view's click event
view.on("click", function(event) {
 const screenPoint = {
  x: event.x,
  y: event.y
 };
  // Search for graphics at the clicked location
  view.hitTest(screenPoint).then(function(response) {
    const result = response.results[0];

    if (result) {
      const lon = result.mapPoint.longitude;
      const lat = result.mapPoint.latitude;

      console.log("Hit surface at (" + lon + ", " + lat + "), graphic:", result.graphic || "none");
    }
  });
});

isFulfilled(){Boolean}inherited

isFulfilled() may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected). If it is fulfilled, true will be returned.

Returns:

Type	Description
Boolean	Indicates whether creating an instance of the class has been fulfilled (either resolved or rejected).

isRejected(){Boolean}inherited

isRejected() may be used to verify if creating an instance of the class is rejected. If it is rejected, true will be returned.

Returns:

Type	Description
Boolean	Indicates whether creating an instance of the class has been rejected.

isResolved(){Boolean}inherited

isResolved() may be used to verify if creating an instance of the class is resolved. If it is resolved, true will be returned.

Returns:

Type	Description
Boolean	Indicates whether creating an instance of the class has been resolved.

on(type, modifiersOrHandler, handler){Object}inherited

Registers an event handler on the instance. Call this method to hook an event with a listener. See the Events summary table for a list of listened events.

Parameters:

type String|String[] The name of the event or events to listen for.

modifiersOrHandler String[]|Function Additional modifier keys to filter events. Please see Key Values for possible values. All the standard key values are supported. Alternatively, if no modifiers are required, the function will call when the event fires. The following events don't support modifier keys: blur, focus, layerview-create, layerview-destroy, resize.

handler Function optional The function to call when the event is fired, if modifiers were specified.

Returns:

Type	Description
Object	Returns an event handler with a remove() method that can be called to stop listening for the event. Property Type Description remove Function When called, removes the listener from the event.

See also:

• dojo/on

Example:

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

// Fires `pointer-move` event when user clicks on "Shift"
// key and moves the pointer on the view.
view.on('pointer-move', ["Shift"], function(evt){
  var point = view2d.toMap({x: evt.x, y: evt.y});
  bufferPoint(point);
});

takeScreenshot(options){Promise<Screenshot>}

Since: ArcGIS API for JavaScript 4.9

Create a screenshot of the current view. Screenshots include only elements that are rendered on the canvas (all geographical elements), but excludes overlayed DOM elements (UI, popups, measurement labels, etc.). By default, a screenshot of the whole view is created. Different options allow for creating different types of screenshots, including taking screenshots at different aspect ratios, different resolutions and creating thumbnails.

Screenshots are always taken inside the padded area of the view (see padding).

Parameters:

options Object optional Screenshot options. Parameters: format String optional Default Value: jpg The format of the resulting encoded data url. Possible values: jpg | png. quality Number optional Default Value: 98 The quality (0 to 100) of the encoded image when encoding as jpg. width Number optional The width of the screenshot (defaults to the area width). The height will be derived automatically if left unspecified, according to the aspect ratio of the of the screenshot area. height Number optional The height of the screenshot (defaults to the area height). The width will be derived automatically if left unspecified, according to the aspect ratio of the screenshot area. area Object optional Specifies whether to take a screenshot of a specific area of the view. The area coordinates are relative to the origin of the padded view (see padding) and will be clipped to the view size. Defaults to the whole view (padding excluded). Specification: x Number optional The x coordinate of the area. y Number optional The y coordinate of the area. width Number optional The width of the area. height Number optional The height of the area.

Returns:

Type	Description
Promise<Screenshot>	When resolved, returns an object containing an encoded dataUrl and raw image data.

See also:

• Sample - Take a screenshot of a SceneView

Examples:

// Take a screenshot at the same resolution of the current view
view.takeScreenshot().then(function(screenshot) {
  var imageElement = document.getElementById("screenshotImage");
  imageElement.src = screenshot.dataUrl;
});

// Create a square thumbnail from the current view
var options = {
  width: 200,
  height: 200
};

view.takeScreenshot(options).then(function(screenshot) {
  var imageElement = document.getElementById("screenshotImage");
  imageElement.src = screenshot.dataUrl;
});

// Take a high resolution, square screenshot
var options = {
  width: 2048,
  height: 2048
};

view.takeScreenshot(options).then(function(screenshot) {
  var imageElement = document.getElementById("screenshotImage");
  imageElement.src = screenshot.dataUrl;
});

// Take a screenshot of a small area at the center of the view
// Compute the size of the view excluding potential padding
var padding = view.padding;
var innerWidth = view.width - padding.left - padding.right;
var innerHeight = view.height - padding.top - padding.bottom;

// Desired size of the area
var width = 200;
var height = 200;

var options = {
  area: {
    x: (innerWidth - width) / 2,
    y: (innerHeight - height) / 2,
    width: width,
    height: height
  }
};

view.takeScreenshot(options).then(function(screenshot) {
  var imageElement = document.getElementById("screenshotImage");
  imageElement.src = screenshot.dataUrl;
});

toMap(screenPoint, mapPoint){Point}

Converts the given screen point to a map point.

Parameters:

screenPoint Object The screen coordinates to convert. Specification: x Number The horizontal screen coordinate to convert. y Number The vertical screen coordinate to convert.

mapPoint Point optional The point object that will reference the result.

Returns:

Type	Description
Point	The map point corresponding to the given screen point.

toScreen(point, screenPoint){ScreenPoint}

Converts the given map point to a screen point.

Parameters:

point Point A point geometry.

screenPoint ScreenPoint optional ScreenPoint object that will reference the result.

Returns:

Type	Description
ScreenPoint	The screen point corresponding to the given map point.

when(callback, errback){Promise}inherited

Since: ArcGIS API for JavaScript 4.6

when() may be leveraged once an instance of the class is created. This method takes two input parameters: a callback function and an errback function. The callback executes when the instance of the class loads. The errback executes if the instance of the class fails to load.

Parameters:

callback Function optional The function to call when the promise resolves.

errback Function optional The function to execute when the promise fails.

Returns:

Type	Description
Promise	Returns a new promise for the result of callback that may be used to chain additional functions.

Example:

// Although this example uses MapView, any class instance that is a promise may use then() in the same way
var view = new MapView();
view.when(function(){
  // This function will execute once the promise is resolved
}, function(error){
  // This function will execute if the promise is rejected due to an error
});

whenLayerView(layer){Promise<LayerView>}inherited

Gets the LayerView created on the view for the given layer. The returned promise resolves when the layer view for the given layer has been created, or rejects with an error (for example if the layer is not part of the view, or if the layer type is not supported in this view).

Parameter:

layer Layer The layer for which to obtain its LayerView.

Returns:

Type	Description
Promise<LayerView>	Resolves to an instance of LayerView for the specified layer.

See also:

• Sample - StreamLayer

Example:

// Create a feature layer from a url pointing to a Feature Service
var layer = new FeatureLayer(url);

map.add(layer);

view.whenLayerView(layer)
    .then(function(layerView) {
      // The layerview for the layer
    })
    .catch(function(error) {
      // An error occurred during the layerview creation
    });

Type Definitions

EasingFunction(t, duration){Number}

User provided easing function. The function receives a normalized time between 0 and 1 as input and should provide a transformed normalized time between 0 and 1 as output.

Parameters:

t Number The input time (from 0 to 1)

duration Number The total duration (in milliseconds) of the animation. This may be used for heuristics on deciding what type of easing to perform.

Returns:

Type	Description
Number	a value between 0 and 1

Example:

// Simple quadratic ease in function
function easeIn(t) {
  return t * t;
}

HitTestResult

Object specification for the result of the hitTest() method.

Properties:

results Object[] An array of result objects returned from the hitTest(). Results are returned when the location of the input screen coordinates intersect a Graphic in the view. See the table below for the specification of each object in this array. Specification: graphic Graphic A graphic present in the view that intersects the input screen coordinates. If the graphic comes from a layer with an applied Renderer, then the symbol property will be empty. Other properties will be empty based on the context in which the graphic is fetched. mapPoint Point The point geometry in the spatial reference of the view corresponding with the input screen coordinates.

Screenshot

Since: ArcGIS API for JavaScript 4.9

Object returned when takeScreenshot() promise resolves:

Properties:

dataUrl String A data url representing the screenshot.

data ImageData The raw RGBA image data.

Event Overview

{target: View,native: Object}

{mapPoint: Point,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{mapPoint: Point,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{action: String,x: Number,y: Number,origin: Object,button: Number,buttons: Number,type: String,radius: Number,angle: Number,stopPropagation: Function,timestamp: Number,native: Object}

{target: View,native: Object}

{mapPoint: Point,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{mapPoint: Point,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{repeat: Boolean,key: String,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{type: String,stopPropagation: Function,timestamp: Number,native: Object}

{layer: Layer,layerView: LayerView}

{layer: Layer,layerView: LayerView}

{x: Number,y: Number,deltaY: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{pointerId: Number,pointerType: String,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{pointerId: Number,pointerType: String,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{pointerId: Number,pointerType: String,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{pointerId: Number,pointerType: String,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{pointerId: Number,pointerType: String,x: Number,y: Number,button: Number,buttons: Number,type: String,stopPropagation: Function,timestamp: Number,native: Object}

{oldWidth: Number,oldHeight: Number,width: Number,height: Number}

Event Details

blurinherited

Since: ArcGIS API for JavaScript 4.7

Fires when browser focus is moved away from the view.

Properties:

target View The view that the browser focus is moved away from.

native Object A standard DOM KeyboardEvent.

clickinherited

Fires after a user clicks on the view. This event emits slightly slower than a pointer-down event to make sure that a double-click event isn't triggered instead. The immediate-click event can be used for responding to a click event without delay.

Properties:

mapPoint Point The point location of the click on the view in the spatial reference of the map.

x Number The horizontal screen coordinate of the click on the view.

y Number The vertical screen coordinate of the click on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates the current mouse button state. Value Description 0 left click (or touch) 1 middle click 2 right click

type String For click the type is always click.

stopPropagation Function Prevents event propagation bubbling up the event chain. By default the click event will close the view's popup if the clicked location doesn't intersect a feature containing a PopupTemplate. If calling view.popup.open() to display custom content in the popup, you should call event.stopPropagation() on the click event object to disable this default behavior. This ensures the popup will remain open or open with new custom content when the user clicks other locations in the view.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM PointerEvent.

See also:

• Sample: Access features with click events

Examples:

// Set up a click event handler and retrieve the screen point
view.on("click", function(event) {
 // the hitTest() checks to see if any graphics in the view
 // intersect the given screen x, y coordinates
 view.hitTest(event)
  .then(getGraphics);
});

view.on("click", function(event) {
 // you must overwrite default click-for-popup
 // behavior to display your own popup
 event.stopPropagation();

 // Get the coordinates of the click on the view
 var lat = Math.round(event.mapPoint.latitude * 1000) / 1000;
 var lon = Math.round(event.mapPoint.longitude * 1000) / 1000;

 view.popup.open({
   // Set the popup's title to the coordinates of the location
   title: "Reverse geocode: [" + lon + ", " + lat + "]",
   location: event.mapPoint // Set the location of the popup to the clicked location
   content: "This is a point of interest"  // content displayed in the popup
 });
});

double-clickinherited

Fires after double-clicking on the view.

Properties:

mapPoint Point The point location of the click on the view in the spatial reference of the map.

x Number The horizontal screen coordinate of the click on the view.

y Number The vertical screen coordinate of the click on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates the current mouse button state. Value Description 0 left click (or touch) 1 middle click 2 right click

type String For double-click the type is always double-click.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM PointerEvent.

Example:

view.on("double-click", function(event) {
  // The event object contains the mapPoint and the screen coordinates of the location
  // that was clicked.
  console.log("screen point", event.x, event.y);
  console.log("map point", event.mapPoint);
});

draginherited

Fires during a pointer drag on the view.

Properties:

action String Indicates the state of the drag. The two values added and removed indicate a change in the number of pointers involved. Possible Values: start | added | update | removed | end

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

origin Object Screen coordinates of the start of the drag. Specification: x Number The horizontal screen coordinate of the pointer on the view. y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked at the start of the drag. See MouseEvent.button. Value Description 0 left mouse button (or touch) 1 middle mouse button 2 right mouse button

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String For drag the type is always drag.

radius Number The radius of a sphere around the multiple pointers involved in this drag. Or 0 while only a single pointer is used.

angle Number Amount of rotation (in degrees) since the last event of type start.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM MouseEvent.

Example:

view.on("drag", function(evt){
 // Print out the current state of the
 // drag event.
 console.log("drag state", evt.action);
});

focusinherited

Since: ArcGIS API for JavaScript 4.7

Fires when browser focus is on the view.

Properties:

target View The view that the browser focus is currently on.

native Object A standard DOM KeyboardEvent.

holdinherited

Fires after holding either a mouse button or a single finger on the view for a short amount of time.

Properties:

mapPoint Point The point location of the click on the view in the spatial reference of the map.

x Number The horizontal screen coordinate of the hold on the view.

y Number The vertical screen coordinate of the hold on the view.

button Number Indicates which mouse button was held down. See MouseEvent.button. Value Description 0 left mouse button (or touch) 1 middle mouse button 2 right mouse button

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String For hold the type is always hold.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM PointerEvent.

Example:

view.on("hold", function(event) {
  // The event object contains the mapPoint and the screen coordinates of the location
  // that was clicked.
  console.log("hold at screen point", event.x, event.y);
  console.log("hold at map point", event.mapPoint);
});

immediate-clickinherited

Since: ArcGIS API for JavaScript 4.7

Fires right after a user clicks on the view. In contrast to the click event, the immediate-click event is emitted as soon as the user clicks on the view, and is not inhibited by a double-click event. This event is useful for interactive experiences that require feedback without delay.

Properties:

mapPoint Point The point location of the click on the view in the spatial reference of the map.

x Number The horizontal screen coordinate of the click on the view.

y Number The vertical screen coordinate of the click on the view.

button Number Indicates which mouse button was clicked. See MouseEvent.button. Value Description 0 left click (or touch) 1 middle click 2 right click

buttons Number Indicates which buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String For click the type is always immediate-click.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM PointerEvent.

Example:

// Set up an immediate-click event handler and retrieve the screen point
view.on("immediate-click", function(event) {
 // the hitTest() checks to see if any graphics in the view
 // intersect the given screen x, y coordinates
 view.hitTest(event)
  .then(getGraphics);
});

key-downinherited

Fires after a keyboard key is pressed.

Properties:

repeat Boolean Indicates whether this is the first event emitted due to the key press, or a repeat.

key String The key value that was pressed, according to the MDN full list of key values.

type String For key-down the type is always key-down.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM KeyboardEvent.

Example:

// Zoom in when user clicks on "a" button
// Zoom out when user clicks on "s" button
view.on("key-down", function(evt){
 console.log("key-down", evt);

 if (evt.key === "a"){
   var zm = view.zoom + 1;

   view.goTo({
     target: view.center,
     zoom: zm
   });
 }
 else if(evt.key == "s"){
   var zm = view.zoom - 1;

   view.goTo({
     target: view.center,
     zoom: zm
   });
 }
});

key-upinherited

Fires after a keyboard key is released.

Properties:

type String For key-up the type is always key-up.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM KeyboardEvent.

layerview-createinherited

Fires after each layer in the map has a corresponding LayerView created and rendered in the view.

Properties:

layer Layer The layer in the map for which the layerView was created.

layerView LayerView The LayerView rendered in the view representing the layer in layer.

See also:

• View.whenLayerView()

Example:

// This function fires each time a layer view is created for a layer in
// the map of the view.
view.on("layerview-create", function(event) {
  // The event contains the layer and its layer view that has just been
  // created. Here we check for the creation of a layer view for a layer with
  // a specific id, and log the layer view
  if (event.layer.id === "satellite") {
    // The LayerView for the desired layer
    console.log(event.layerView);
  }
});

layerview-destroyinherited

Fires after a LayerView is destroyed and is no longer rendered in the view. This happens for example when a layer is removed from the map of the view.

Properties:

layer Layer The layer in the map for which the layerView was destroyed.

layerView LayerView The LayerView that was destroyed in the view.

mouse-wheelinherited

Fires when a wheel button of a pointing device (typically a mouse) is scrolled on the view.

Properties:

x Number The horizontal screen coordinate of the click on the view.

y Number The vertical screen coordinate of the click on the view.

deltaY Number Number representing the vertical scroll amount.

type String For mouse-wheel the type is always mouse-wheel.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM WheelEvent.

Example:

view.on("mouse-wheel", function(evt){
 // deltaY value is postive when wheel is scrolled up
 // and it is negative when wheel is scrolled down.
 console.log(evt.deltaY);
});

pointer-downinherited

Fires after a mouse button is pressed, or a finger touches the display.

Properties:

pointerId Number Uniquely identifies a pointer between multiple down, move, and up events. Ids might get reused after a pointer-up event.

pointerType String Indicates the pointer type. Possible Values: mouse | touch

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String For pointer-down the type is always pointer-down.

stopPropagation Function Prevents event propagation bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was emitted.

native Object A standard DOM PointerEvent.

pointer-enterinherited

Fires after a mouse cursor enters the view, or a display touch begins.

Properties:

pointerId Number Uniquely identifies a pointer between multiple events. Ids might get reused after a pointer-up event.

pointerType String Indicates the pointer type. Possible Values: mouse | touch

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String Type of the event. It is always pointer-enter for this event.

stopPropagation Function Prevents further propagation of the current event bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was created.

native Object A standard DOM PointerEvent.

pointer-leaveinherited

Fires after a mouse cursor leaves the view, or a display touch ends.

Properties:

pointerId Number Uniquely identifies a pointer between multiple events. Ids might get reused after a pointer-up event.

pointerType String Indicates the pointer type. Possible Values: mouse | touch

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String Type of the event. It is always pointer-leave for this event.

stopPropagation Function Prevents further propagation of the current event bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was created.

native Object A standard DOM PointerEvent.

pointer-moveinherited

Fires after the mouse or a finger on the display moves.

Properties:

pointerId Number Uniquely identifies a pointer between multiple down, move, and up events. Ids might get reused after a pointer-up event.

pointerType String Indicates the pointer type. Possible Values: mouse | touch

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String Type of the event. It is always pointer-move for this event.

stopPropagation Function Prevents further propagation of the current event bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was created.

native Object A standard DOM PointerEvent.

Example:

// Fires `pointer-move` event when user clicks on "Shift"
// key and moves the pointer on the view.
view.on('pointer-move', ["Shift"], function(evt){
  var point = view2d.toMap({x: evt.x, y: evt.y});
  bufferPoint(point);
});

pointer-upinherited

Fires after a mouse button is released, or a display touch ends.

Properties:

pointerId Number Uniquely identifies a pointer between multiple down, move, and up events. Ids might get reused after a pointer-up event.

pointerType String Indicates the pointer type. Possible Values: mouse | touch

x Number The horizontal screen coordinate of the pointer on the view.

y Number The vertical screen coordinate of the pointer on the view.

button Number Indicates which mouse button was clicked.

buttons Number Indicates which mouse buttons are pressed when the event is triggered. See MouseEvent.buttons.

type String Type of the event. It is always pointer-up for this event.

stopPropagation Function Prevents further propagation of the current event bubbling up the event chain.

timestamp Number Time stamp (in milliseconds) at which the event was created.

native Object A standard DOM PointerEvent.

resizeinherited

Fires when the view's size changes.

Properties:

oldWidth Number The previous view width in pixels

oldHeight Number The previous view height in pixels

width Number The new measured view width in pixels

height Number The new measured view height in pixels

See also:

• size
• height
• width