Breaking changes

A comprehensive guide to all breaking changes for the ArcGIS API for JavaScript, ordered by release version. This guide is helpful for people upgrading versions of the API in their app(s). Scroll down to find the current version of the API in use, then follow the changes up to the latest version, and make the relevant updates.

To see all the latest features and advancements, please refer to the Release Notes. To see all the added features and advancements from all versions, please refer to the Previous Versions Release Notes section.

4.18

• No support for IE11/Edge Legacy. Support for Internet Explorer 11 and Edge Legacy was deprecated at version 4.16, and ends at version 4.18. See our updated System Requirements page and the Why is Esri ending support for Internet Explorer 11? blog to learn more.
• The default format for the takeScreenshot() method on MapView and SceneView has changed to png instead of jpg.
• The mediaType property was removed from OGCFeatureLayer. All requests for metadata and data content will be made with the "f=json" url parameter.
• FeatureForm.getValues() will now always return an Object with updated attributes. Prior to this, it would return null if there was no feature provided.
• FeatureForm.getValues() will return undefined if there is no existing attribute on the edit feature. This is meant to distinguish from valid null values.
• The FeatureTable widget no longer uses the layer's maxRecordCount to determine pagination size. It automatically defaults to 50 records unless the layer contains less than this. If so, it will take this count and set the pagination to it.
• Updated the callback for intl.onLocalChange() to return a LocaleChangeCallback instead of a Function.
• The default mode for the defaultCreateOptions on the Sketch widget has changed to click instead of hybrid.
• The RouteParameters.barriers property has been removed. It was deprecated as of version 4.11. Use pointBarriers, polygonBarriers, and/or polylineBarriers instead.

4.17

• For better memory management, view.destroy() now destroys all attached resources, including the map. To prevent the map from being destroyed, you can unset the map before calling destroy().

// destroy the view and all attached resources
view.destroy();

// unset map from the view so that it is not destroyed
// then destroy the view and all attached resources
const map = view.map;
view.map = null;
view.destroy();

• The ActionButton and ActionToggle classes now correctly implement their types as either button or toggle. Prior to this, it was set as string.
• The goToMedia() method in the Feature widget and its corresponding viewModel has been renamed to setActiveMedia.
• The tables property for WebMap now takes a collection of Layers instead of an array of Objects.
• The TimeSlider.loop property now has a default value of false instead of true.
• Service metadata for all layers and tables are now collectively fetched from FeatureServer/layers/REST endpoint as opposed to each layer fetching its metadata from its dedicated endpoint, e.g. (FeatureServer/<layerID>).
• StreamLayer.maximumTrackPoints was deprecated at version 4.15 and is now removed. Use StreamLayer.purgeOptions.maxObservations instead.
• Using applyEdits to add geometries with z-values to a FeatureLayer with hasZ: false no longer silently drops the z-value and now throws an error.
• Performance improvements were made to Popups. Prior to this release, it was possible to access the popup feature's geometry without having to specify outFields on the FeatureLayer or the PopupTemplate. It was always recommended to set this, but was never required. Going forward, if needing access to the underlying feature's geometry, this property must be set. This also holds true if working with WebMaps containing popups. If a popup does not have a referenced Arcade expression that works with geometry, it is now required to access either the WebMap's layer or its PopupTemplate and set the outFields.

4.16

• Removed Dojo promises. Native Promises have been activated by default. The has flag "esri-native-promise" is no longer supported.
• Removed use of Dojo’s declare module. This means that apps with classes that leverage the API class framework and multiple inheritance will stop working. The recommended approach is to use mixins with Accessor.
• The TileImageryLayer is removed and replaced by the ImageryTileLayer.
• The TimeExtent's intersection method now returns an instance of TimeExtent with undefined values for start and end properties if the two time extents do not intersect.
• The suspended property of the View is now set to false when the view container's css style visibility is set to hidden (visibility:hidden). The view is hidden but it renders and updates data now.
• CIMSymbol's data property now only supports CIMSymbolReference JSON. The CIMSymbol JSON should be applied at cimSymbol.data.symbol.

4.15

• API returns native Promise by default as of 4.15. See API Modernization for more information.
• dgrid styles are no longer globally included. If using dgrid in your web application, you will need to reference the stylesheet separately.
• Removed ImageMeshColor, which was deprecated since version 4.11. Set MeshTexture on MeshMaterial.colorTexture instead.
• Removed requireUtils, which was deprecated since version 4.10. Use promiseUtils.create() instead.
• Removed ValueMeshColor, which was deprecated since version 4.11. Use MeshMaterial.color instead.
• Removed capabilities and version properties from StreamLayer.
• The update event on Sketch widget and SketchViewModel no longer have cancel state. The parameter aborted on update events indicates that the process got cancelled.
• The attachmentInfos property has been removed from AttachmentsContent. It is now handled via the Attachments widget and can be accessed via its viewModel.
• The Workflow.data property now returns either a CreateWorkflow or UpdateWorkflow reference.
• The Editor widget and the EditorViewModel's activeWorkflow property now returns either a reference to either a CreateWorkflow or UpdateWorkflow.
• The Workflow edits are now referenced in the Edits class.

4.14

• When the propagation of an event is stopped on the View, then the propagation of any derived events are stopped. For example, when stopPropagation() is called on an immediate-click event, click and double-click events are no longer emitted. When stopPropagation() is called on an pointer-up event, immediate-click, click and double-click are no longer emitted. This makes implementing event handlers easier, since applications usually want to handle only one of those event types at a time.
• FeatureLayerView.queryFeatures and GeoJSONLayerView.queryFeatures results will no longer include z-values in 2D MapView even if the query.returnZ is set to true.
• The Sketch has a new property called creationMode with a default value of continuous. This allows you to continuously create graphics with same geometry types by default. This is different from the widget's default behavior in previous releases, where you could create a single graphic at a time.
• To select or unselect multiple vertices during a graphic update operation using the Sketch widget, we now use Shift + Left-click combination instead of Ctrl + Left-click on vertices.
• 2D measurement widgets changed the base class from esri-area-measurement-3d to esri-area-measurement-2d and from esri-direct-line-measurement-3d to esri-distance-measurement-2d.
• Removed the getImageUrl() method from MapImageLayer. This method was deprecated since version 4.11. We recommend extending BaseDynamicLayer instead.
• Removed the value-change and values-change events from Slider and HistogramRangeSlider. These events were deprecated since version 4.13. We recommend watching the values property or using the other widget events instead.
• Removed Hindi (hi) as a supported locale.
• Classes related to ArcGIS Workflow Manager have been removed. They were marked as deprecated starting with version 4.13.
• The HTML sanitizer was added to all widgets to sanitize and escape strings according to the ArcGIS Online supported HTML specification. This can cause HTML set in PopupTemplate.content or in other widgets to be removed.

4.13

• The StretchRenderer is removed and replaced by the RasterStretchRenderer.
• The Geoprocessor class has been modernized, which required several changes:
  • Removed the updateDelay property.
  • Removed the cancelJobStatusUpdates() method.
  • The submitJob() method now immediately returns with a promise that resolves a JobInfo, as soon as the job is successfully submitted to the server. Previously, the returned promise was resolved only after the request succeeded. Now you can use the waitForJobCompletion() method to get notified of job completion and optionally of job status.
  • The getResultMapImageLayer() method now returns a promise, which when resolved, returns a MapImageLayer. Previously, a MapImageLayer was returned.
  • When the getResultData() method requests data from GPFeatureRecordSetLayer or GPRecordSet it returns a DataFile when a url property is detected.
• Removed the mode property from the AreaMeasurement2D and DistanceMeasurement2D widgets and ViewModels. See Measurement Enhancements for more information.
• Removed the pixelSizeX and pixelSizeY properties from ImageServiceIdentifyParameters. Use pixelSize property instead.
• Removed the domainFields property ImageryLayer. Use fields property instead.
• Removed the hasRasterAttributeTable and rasterAttributeTable properties from ImageryLayer. Use the ImageryLayer's serviceRasterInfo.attributeTable property instead.
• Removed reset method from Sketch and SketchViewModel. Use cancel method on respective classes.
• Removed value-change event from SliderViewModel.
• Removed the default tabindex on the bars of the Histogram widget. All slider widgets that implement Histogram, including HistogramRangeSlider and all smart mapping sliders, are affected by this change. To tab through histogram bars, the app developer should use barCreatedFunction to set a tabindex of 0 to each bar element.
• Removed filter and updateFilter from StreamLayer.
• Removed connect, disconnect, graphics, and updateFilter from StreamLayerView.

4.12

• ClassBreaksRenderer.getClassBreakInfo() was changed from a synchronous to an asynchronous function.
• UniqueValueRenderer.getUniqueValueInfo() was changed from a synchronous to an asynchronous function.
• As part of performance optimizations, incorrect polygon geometries that don't follow the expected clockwise order, no longer display. Polygon rings should be clockwise, with counterclockwise rings considered holes.
• Changed locatorTask.locationToAddress() arguments from (location, distance, requestOptions) to now accept (params, requestOptions). The params object has two properties: location and locationType.
• Changed the behavior for the queries queryExtent(), queryFeatureCount(), queryFeatures() and queryObjectIds() in SceneLayerView that the required fields needs to be defined with SceneLayer.outFields in advance.
• Changed the behavior of color in SceneView to be consistent with MapView. If the color value of a graphic is set to null it will display transparent.
• Full SQL support is now provided for where clauses on the LabelClass in 3D. Old where clauses that didn't implement strict SQL syntax might break.
• Moved classes Search, SearchLayer and SearchLayerField from webscene.applicationProperties to the webdoc.applicationProperties module, common for WebMap and WebScene.
• Removed actionsMenuEnabled property from Popup.
• Removed dotBlendingEnabled and referenceDotValue properties from DotDensityRenderer.
• Removed distance parameter from esri/widgets/Search and esri/tasks/Locator as it is deprecated and no longer recognized by the World Geocoding Service.
• Removed localSearchOptions and locationToAddressDistance properties from esri/widgets/Search. These properties were deprecated at version 4.11.
• Removed material property from the base class Symbol3DLayer. With this new behavior, subclasses of Symbol3DLayer implement the material property independently.
• Removed noData property from ImageServiceIdentifyParameters.
• Removed timeExtent property from TimeInfo. Use fullTimeExtent property instead.
• Replaced esri/widgets/ColorSizeSlider with esri/widgets/smartMapping/ColorSizeSlider.
• Replaced esri/widgets/ColorSlider with esri/widgets/smartMapping/ColorSlider.
• Replaced esri/widgets/SizeSlider with esri/widgets/smartMapping/SizeSlider.
• The PopupTemplate's content and/or title can no longer be set using a wildcard, e.g. *. Instead, set the Popup's defaultPopupTemplateEnabled property to true.
• The DateString, DateFormat, and NumberFormat formatter functions are no longer supported when used with a PopupTemplate's content and/or title. Instead, set it via the FieldInfo's fieldInfoFormat.
• The noDataValue parameter is now nested within the options parameter when using ElevationLayer.fetchTile() method.
• Use the new esri/intl module and its respective methods in places referencing the esri/core/lang.substitute(), dojo/number.format(), and dojo/date.format() methods.
• Using parameterized functions in a PopupTemplate's content and/or title are no longer supported.
• When neither height, nor width are set for PathSymbol3DLayer then the symbol doesn't render. This is a breaking change from previous versions when not setting size used to renderer the symbol with a height and a width of 1 meter.

4.11

• The behavior of FeatureLayer.outFields has changed. It is no longer computed to include fields required for layer labeling, rendering, editing and elevation info. It now returns null unless it is explicitly set.
  • In general, you no longer need to specify the outFields. The API automatically determines which fields to fetch. However, if you are using the fields in custom functionality, you might still need to explicitly add those using the outFields property.
  • To find out which fields are available client-side, use the new availableFields property. It contains a list of attribute fields fetched for each feature including fields required for layer labeling, rendering, elevation info, and any additional fields defined with the FeatureLayer.outFields property. The availableFields is populated when the layer view is finished updating.
• Query.units property's default value is now null instead of meters.
• Sublayer.createFeatureLayer() now returns a promise resolving to a FeatureLayer, as opposed to a FeatureLayer.
• Autocasting is no longer supported for Mesh geometry.
• Change to how texture transparency is interpreted in esri/geometry/support/MeshMaterial. Before, values below 0.1 would be interpreted as fully transparent (i.e. masking), now this threshold was moved to 0.5. If the old behavior is desired, the threshold can now be explicitly changed using the alphaCutoff property.
• Moved the select method out of FeatureTemplates and into the FeatureTemplatesViewModel.
• Removed contentEnabled property on both the Feature widget and the FeatureViewModel.
• Removed esri/geometry/ScreenPoint class.
• Removed Legend support from MapNotesLayer.
• Removed token property from all layer classes. The recommended approach to pass a token on a layer is to use IdentityManager.registerToken() or to use esriConfig.request.interceptors.
• Removed the view property from Feature widget and FeatureViewModel.
• The MapImageLayer.getImageUrl() method now returns null.
• Renamed definitionExpression property of AttachmentQuery class to where.
• Renamed definitionExpression property of RelationshipQuery class to where.
• Renamed TemplateItemGroup.name to TemplateItemGroup.label.
• Renamed FeatureLayerSearchSource class to LayerSearchSource.
  • The renamed LayerSearchSource class now takes a Layer property as opposed to a FeatureLayer.
  • The sources property within the Directions.SearchProperties object now takes a LayerSearchSource as opposed to FeatureLayerSearchSource.
• As part of adding 3D drawing support, the 2D draw classes have moved:
  • Moved esri/views/2d/draw/Draw to esri/views/draw/Draw.
  • Moved esri/views/2d/draw/DrawAction to esri/views/draw/DrawAction.
  • Moved esri/views/2d/draw/PointDrawAction to esri/views/draw/PointDrawAction.
  • Moved esri/views/2d/draw/PolylineDrawAction to esri/views/draw/PolylineDrawAction.
  • Moved esri/views/2d/draw/PolygonDrawAction to esri/views/draw/PolygonDrawAction.
  • Moved esri/views/2d/draw/MultipointDrawAction to esri/views/draw/MultipointDrawAction.
  • Moved esri/views/2d/draw/SegmentDrawAction to esri/views/draw/SegmentDrawAction.
• Several popup related classes have been moved, renamed or removed:
  • Removed Chart class from esri/support/ContentElement/Media/Chart.
  • Removed Media class from esri/support/ContentElement/Media/Media.
  • ExpressionInfo class moved from esri/support/ExpressionInfo to esri/popup/ExpressionInfo.
  • FieldInfo class moved from esri/support/FieldInfo to esri/popup/FieldInfo.
  • LayerOptions class moved from esri/support/LayerOptions to esri/popup/LayerOptions.
  • RelatedRecordsInfo class moved from esri/support/RelatedRecordsInfo to esri/popup/RelatedRecordsInfo.
  • Renamed ContentElement class from esri/support/ContentElement to content and moved to esri/popup/content.
  • Renamed ContentElement class from esri/support/ContentElement/ContentElement to Content and moved to esri/popup/content/Content.
  • Renamed Attachments class from esri/support/ContentElement/Attachments to AttachmentsContent and moved to esri/popup/content/AttachmentsContent.
  • Renamed Fields class from esri/support/ContentElement/FieldsContent to FieldsContent and moved to esri/popup/content/FieldsContent.
  • Renamed Text class from esri/support/ContentElement/Text to TextContent and moved to esri/popup/content/TextContent.
  • Renamed Media class from esri/support/ContentElement/Media to MediaContent and moved to esri/popup/content/MediaContent.
  • Renamed BarChart class from esri/support/ContentElement/Media/BarChart to BarChartMediaInfo and moved to esri/popup/content/BarChartMediaInfo.
  • Renamed FieldsOrder class from esri/support/RelatedRecordsInfo/FieldOrder to RelatedRecordsInfoFieldOrder and moved to esri/popup/support/RelatedRecordsInfoFieldOrder.
  • Renamed Format class from esri/support/FieldInfo/Format to FieldInfoFormat and moved to esri/popup/support/FieldInfoFormat.
  • Renamed Series class from esri/support/ContentElement/Media/Chart/Series to ChartMediaInfoValueSeries and moved to esri/popup/content/support/ChartMediaInfoValueSeries.
  • Renamed Value class from esri/support/ContentElement/Media/Chart/Value to ChartMediaInfoValue and moved to esri/popup/content/support/ChartMediaInfoValue.
  • Renamed ColumnChart class from esri/support/ContentElement/Media/ColumnChart to ColumnChartMediaInfo and moved to esri/popup/content/ColumnChartMediaInfo.
  • Renamed LineChart class from esri/support/ContentElement/Media/LineChart to LineChartMediaInfo and moved to esri/popup/content/LineChartMediaInfo.
  • Renamed PieChart class from esri/support/ContentElement/Media/PieChart to PieChartMediaInfo and moved to esri/popup/content/PieChartMediaInfo.
  • Renamed Image class from esri/support/ContentElement/Media/Image to ImageMediaInfo and moved to esri/popup/content/ImageMediaInfo.
  • Renamed Value class from esri/support/ContentElement/Media/Image/Value to ImageMediaInfoValue and moved to esri/popup/content/support/ImageMediaInfoValue.
• A graphic can only be in one GraphicsLayer at a time. When adding a graphic to a graphics layer, and if it is already in another graphics layer, the graphic is moved to the destination graphics layer.
• The developer and user experiences for 2D highlights have been improved in three ways:
  • soft, anti-aliased edges
  • decreased default opacity that is now consistent with the default settings used in 3D
  • modified coverage algorithm that now highlights the transparent portions of lines and polygons

4.10

• Renamed the Esri Icon Font family from CalciteWebCoreIcons to calcite-web-icons for 2D MapViews.
• Removed FeatureLayer.capabilities.query.supportsAttachments from esri/layers/FeatureLayer.
• Creating a FeatureLayer from client-side features now requires a type property to be set for each field.
• The FieldOptions class has been removed and merged with the FieldConfig class.
• Removed the ability of event.stopPropagation() to allow manual display of a Popup with the view's click event. Set the new autoOpenEnabled to false instead.
• All documentation for IdentityManagerBase has been merged into IdentityManager.

4.9

• Bookmark class moved from esri/widgets/Bookmarks/Bookmark to esri/webmap/Bookmark.
• FeatureLayer.queryFeatureAttachments() method is removed. Use FeatureLayer.queryAttachments instead.
• Functions can no longer be used in renderers and visual variables in place of fields. Use the valueExpression property instead.
• Removed esriConfig's request properties: corsDetection, corsDetectionTimeout, corsEnabledServers, forceProxy, and useCors properties.
• Removed the allowImageDataAccess requestOption property from the esriRequest method. Also removed it as a property from MapImageLayer, BingMapsLayer, and OpenStreetMap options. The API automatically allows this without having to explicitly set it.
• Removed the isMaxInclusive property from ClassBreaksRenderer.
• Removed the popupOpenOnSelect property from Search widget and SearchViewModel.
• Set the new trustedServers property available in esriConfig's request property if needing to include credentials such as cookies and authorization headers in cross origin requests. Prior to version 4.9, this would be handled by setting corsEnabledServers withCredentials property to true.
• CSS style, esri-widget__header, was renamed to .esri-widget__heading. For additional information on working with this style, see the Styling guide topic.
• SceneView.goTo() method now queries the target location for elevation if the target doesn't have a z-value. This means that the promise will not resolve immediately anymore, even if the animate option is set to false.

4.8

• Corrected format and layout TemplateOptions values to be consistent with documentation.
• Removed minSize property from pointSizeAlgorithm.
• FeatureLayerView.queryFeatures() and CSVLayerView.queryFeatures() now resolve to a FeatureSet an array of graphics.
• SketchViewModel.update() now accepts graphic instead of geometry.
• SketchViewModel's draw-start event was renamed to create-init, draw-cancel to create-cancel and draw-complete create-complete and update-start was renamed to update-init.
• The always() and otherwise() methods were deprecated at 4.7 and have been removed as of version 4.8.
• Removed defaultSource from both the Search widget and SearchViewModel. Instead, use the defaultSources property.
• The state property was removed from the Search widget and added into the SearchViewModel.
• In 3D, during continuous camera movement, updates on FeatureLayers with large data sets may be suspended until the continuous camera movement has finished.
• CSS class, .esri-widget-button, has been renamed to .esri-widget--button (take note of the two dashes -- before button).
• The Action class has been deprecated. You should now use either ActionButton or ActionToggle in its place.
• To access a Graphic's PopupTemplate, use the getEffectivePopupTemplate method. Prior to version 4.8, if the popupTemplate was not defined on the Graphic, it would use the popupTemplate from the graphic's layer.
• Removed support for using Bower to install the ArcGIS API for JavaScript into a local project. We recommend moving to npm to take advantage of more web development tools.

4.7

• Changed layers property to layer in AttributionItem.
• Removed classificationMethod property from ClassBreaksRenderer.
• Removed createActionsFunction property from LayerList and LayerListViewModel (use listItemCreatedFunction instead).
• Removed graphic property from draw-complete.
• Removed styleOrigin property from LabelSymbol3D.
• Removed then() method from all classes (use when() instead when using Promises).

4.6

• attributionText and itemDelimiter have moved from AttributionViewModel to the Attribution widget.
• Altitude constraints are no longer applied in local scenes.
• SceneView.goTo and MapView.goTo always return a Promise and not a ViewAnimation anymore.
• The Search widget's searching property has been replaced with state.
• relationParam property on Query is renamed to relationParameter.
• relationParam property on RelationParameters is renamed to relationParameter.
• VectorTileLayer's url property type is String only now. When initializing a VectorTileLayer with style JSON object, use VectorTileLayer's style property instead.

4.5

• The type property in all renderer, symbol, and symbol layer classes is no longer read-only.
• Changed type value for many renderers for consistent kebab-casing:
  • UniqueValueRenderer.type was changed from uniqueValue to unique-value.
  • ClassBreaksRenderer.type was changed from classBreaks to class-breaks.
  • PointCloudClassBreaksRenderer.type was changed from pointCloudClassBreaksRenderer to point-cloud-class-breaks.
  • PointCloudRGBRenderer.type was changed from pointCloudRGBRenderer to point-cloud-rgb.
  • PointCloudStretchRenderer.type was changed from pointCloudStretchRenderer to point-cloud-stretch.
  • PointCloudUniqueValueRenderer.type was changed from pointCloudUniqueValueRenderer to point-cloud-unique-value.
  • SimpleMarkerSymbol.type was changed from simple-marker-symbol to simple-marker.
  • SimpleLineSymbol.type was changed from simple-line-symbol to simple-line.
  • SimpleFillSymbol.type was changed from simple-fill-symbol to simple-fill.
  • PictureMarkerSymbol.type was changed from picture-marker-symbol to picture-marker.
  • PictureFillSymbol.type was changed from picture-fill-symbol to picture-fill.
  • TextSymbol.type was changed from text-symbol to text.
  • PointSymbol3D.type was changed from point-symbol-3d to point-3d.
  • LineSymbol3D.type was changed from line-symbol-3d to line-3d.
  • PolygonSymbol3D.type was changed from polygon-symbol-3d to polygon-3d.
  • MeshSymbol3D.type was changed from mesh-symbol-3d to mesh-3d.
  • LabelSymbol3D.type was changed from label-symbol-3d to label-3d.
  • WebStyleSymbol.type was changed from web-style-symbol to web-style.
• ElevationLayers are always visible at the slide level when saving a scene with API 4.5 to Portal 10.5.1 (or earlier).
• The zoomScale property in Search sources now automatically uses the set scale. Prior to this version, it would only zoom to the scale if the search result did not have an associated extent.
• The Search widget's search() method returns a Promise which, when resolved, returns a SearchResponse similar to the search-complete event.
• Both the Search widget and its corresponding viewmodel's suggest() method returns a Promise which, when resolved, returns a SuggestResponse similar to the suggest-complete event.
• Removed the cancelSuggest from SearchViewModel.
• Removed the Graphic getEffectivePopupTemplate method. Instead, if the graphic's popupTemplate is not defined, it will use the graphic's layer popupTemplate.
• Removed minScale and maxScale properties from ElevationLayer.

4.4

• As of version 4.4, the response for the locator.locationToAddress() method returns a proper AddressCandidate. This bug fix affects two of five AddressCandidate properties: address and attributes. Note that there are no changes to the other AddressCandidate properties: extent, location and score.
  • Prior to 4.4, locationToAddress() incorrectly returned an object that always had an empty attributes property, and the address string was an object. As of 4.4, the address property is a string, and the attributes property will be populated.
  • Specifying an exact field, e.g. CountryCode, should now be written as attributes.CountryCode. (Prior to this version, it was written as address.CountryCode.)
  • The popup sample using reverse geocoding has been updated to reflect this change.
• Esri icon font styles and codes have been updated, resulting in some codes being changed or used for new icon fonts.
• ViewAnimation.stop() now rejects the ViewAnimation promise.
• 3D Symbol layer types changed name style and now use kebab-casing to be consistent with the rest of the API.
• The orientation of 3D WebStyleSymbols was updated. Now the forward-facing side of the symbol points in the direction of the y-axis (North). Setting a heading of 0 on a ObjectSymbol3DLayer will make the symbol point North and setting it to 180 will make the symbol point South. In comparison to the old styles, Signs and signals and Street scene changed orientation by 180 degrees and Transportation changed by 90 degrees.
• As of version 4.x, the recommended approach to pass a token on a layer is to use IdentityManager.registerToken(). Prior to this in 3.x, it was possible to pass a token to a layer either via 1) the layer's token property, or 2) appending it to the end of the layer URL.
• The Search widget's sources property has a new filter option which replaces the now deprecated searchQueryParams, suggestQueryParams, and searchExtent property.
• If developing custom widgets, configuration settings should be updated to reflect "jsxFactory": "tsx", instead of "reactNamespace": "jsxFactory",. This is discussed in the TypeScript setup guide topic.
• For the light values passed into external renderers, the balance between ambient and diffuse lighting has changed. This may result in a slightly different appearance for objects rendered with external renderers. The new light values represent colors/intensities in linear color space, and are optimized for gamma-corrected rendering with a gamma value of 2.1.
• At 4.4, the view.click event will close the popup if the clicked location doesn't intersect a feature with a popup template. You may want to disable this default behavior if opening the popup with custom content or keep it open when the view is clicked. To do so, you must call stopPropagation() on the click event object.

4.3

• sizeRendererCreator.createVisualVariable() was renamed to sizeRendererCreator.createVisualVariables() because it now returns an array of visual variables.

4.2

• The following VectorTileLayer properties are removed: ACCESS_TOKEN
• To increase security, browsers are starting to block Geolocation API on insecure pages, meaning that the Locate button will not work from non-secure web pages (i.e., hosted on http). Google Chrome first implemented this in version 50 (April 2016) and Apple in Safari 10 (September 2016). Mozilla/Firefox is planning to do the same. At version 4.0 and 3.17 the JSAPI no longer displayed the Locate Button for non-secure web apps in the Chrome browser. As of version 4.2 and 3.19, the JSAPI no longer displays the Locate Button for non-secure web apps in any web browser. Note that localhost is considered "potentially secure" and can be used for easy testing.

4.1

• The WebMap.version property was renamed to WebMap.sourceVersion
• The WebScene.version property was renamed to WebScene.sourceVersion
• The ClosestFacilityParameters.returnPolylgonBarriers property was renamed to ClosestFacilityParameters.returnPolygonBarriers
• The FeatureLayer.createQueryParameters property was renamed to FeatureLayer.createQuery
• The Popup's dockOptions' position property now accepts a function in addition to a known string value.
• The NavigationToggle was added to the default widgets for SceneView.
• The Geoprocessor.getResultImageLayer() method was replaced by Geoprocessor.getResultMapImageLayer(). Please see its SDK documentation for signature changes.
• layer-add, layer-remove, and layer-reorder events were removed from GroupLayer, Map and its subclasses. Use the change event of esri/core/Collection instead.

4.0

This was the first official release of the 4x API. Since the prior 4x releases were in beta, they will not be considered here.