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Showing content from https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-Expand.html below:

Expand | API Reference | ArcGIS Maps SDK for JavaScript 4.33

ESM: import Expand from "@arcgis/core/widgets/Expand.js";

CDN: const Expand = await $arcgis.import("@arcgis/core/widgets/Expand.js");

Class: @arcgis/core/widgets/Expand

Since: ArcGIS Maps SDK for JavaScript 4.3

The Expand widget acts as a clickable button for displaying interactive content, most commonly other widgets.

If adding a Slider, HistogramRangeSlider, or TimeSlider as content to the Expand widget, the container or parent container of the widget must have a width set in css for it to render inside the Expand widget.

If setting the width on the slider's container, then set the slider.container as the content of the expand rather than the slider itself.

expand.content = slider.container

See also

Example

// LayerList
const layerList = new LayerList({
  container: document.createElement("div"),
  view: view
});
const layerListExpand = new Expand({
  expandIcon: "layers",  // see https://developers.arcgis.com/calcite-design-system/icons/
  // expandTooltip: "Expand LayerList", // optional, defaults to "Expand" for English locale
  view: view,
  content: layerList
});
view.ui.add(layerListExpand, "top-right");

Constructors

Expand Constructor new Expand(properties)

Parameter

optional

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

Property Overview Any properties can be set, retrieved or listened to. See the Watch for changes topic.

Show inherited properties Hide inherited properties

Property Details

autoCollapse Property autoCollapse Boolean: Automatically collapses the expand widget instance when the view's viewpoint updates.

When true, the Expand widget will close after the Escape key is pressed when the keyboard focus is within its content. This property can also be set to a function that returns a boolean, allowing for more customization for when to allow the Expand widget to be closed from the esc key.

Examples

let expand = new Expand({
   view: view,
   content: search,
   // widget will not be able to be closed from the ESC key
   closeOnEsc: false
});

let expand = new Expand({
   view: view,
   content: search,
   // widget will close on ESC when Search has no active menu
   closeOnEsc: function() {
     return search.activeMenu === "none"
   }
});

collapseIcon Property collapseIcon String Since: ArcGIS Maps SDK for JavaScript 4.27 Expand since 4.3, collapseIcon added at 4.27.: Calcite icon used to style the Expand button when the content can be collapsed.

collapseTooltip Property collapseTooltip String

Tooltip to display to indicate Expand widget can be collapsed.

Default Value:"Collapse" (English locale)

The ID or node representing the DOM element containing the widget. This property can only be set once. The following examples are all valid use case when working with widgets.

Examples

// Create the HTML div element programmatically at runtime and set to the widget's container
const basemapGallery = new BasemapGallery({
  view: view,
  container: document.createElement("div")
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// Specify an already-defined HTML div element in the widget's container

const basemapGallery = new BasemapGallery({
  view: view,
  container: basemapGalleryDiv
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// HTML markup
<body>
  <div id="viewDiv"></div>
  <div id="basemapGalleryDiv"></div>
</body>

// Specify the widget while adding to the view's UI
const basemapGallery = new BasemapGallery({
  view: view
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

The content to display within the expanded Expand widget.

If setting the width on the slider's container (rather than a parent container), then set the slider.container as the content of the expand rather than the slider itself.

expand.content = slider.container

Examples

// A. specify content with a widget
   let searchWidget = new Search({
     view: view
   });

   let expand = new Expand({
     expandIcon: "search",
     view: view,
     content: searchWidget
   });
   view.ui.add(expand, "bottom-left");

// B. specify content with a string (of HTML)
   content: "Hi, I can have <input placeholder='HTML'/>!"

// C. specify content with a DOM node
   let node = domConstruct.create("div", {
     innerHTML: "I'm a real node!"
   });

   let expand = new Expand({
     expandIcon: "arrow-right",
     view: view,
     content: node
   });
   view.ui.add(expand, "top-right");

declaredClass Inherited Property declaredClass Stringreadonly Since: ArcGIS Maps SDK for JavaScript 4.7 Accessor since 4.0, declaredClass added at 4.7.: The name of the class. The declared class name is formatted as esri.folder.className.

Since: ArcGIS Maps SDK for JavaScript 4.27 Expand since 4.3, expandIcon added at 4.27.: Calcite icon used when the widget is collapsed. Will automatically use the content's icon if it has one.

expandTooltip Property expandTooltip String

Tooltip to display to indicate Expand widget can be expanded.

Default Value:"Expand" (English locale)

: Indicates whether the widget is currently expanded or not.

focusTrapDisabled Property focusTrapDisabled Boolean Since: ArcGIS Maps SDK for JavaScript 4.32 Expand since 4.3, focusTrapDisabled added at 4.32.: Disables focus trapping within the expand widget.

Since: ArcGIS Maps SDK for JavaScript 4.6 Expand since 4.3, group added at 4.6.

This value associates two or more Expand widget instances with each other, allowing one instance to auto collapse when another instance in the same group is expanded. For auto collapsing to take effect, all instances of the group must be included in the view's ui property.

For example, if you place multiple Expand instances in the top-left of the view's ui, you can assign them to a group called top-left. If one Expand instance is expanded and the user clicks on a different instance in the top-left group, then the first instance is collapsed, allowing the content of the second instance to be fully visible.

Example

let expand1 = new Expand({
  view: view,
  content: document.getElementById("bg-gallery"),
  expandIcon: "basemap",
  group: "bottom-right"
});
let expand2 = new Expand({
  view: view,
  content: document.getElementById("legend"),
  expandIcon: "key",
  group: "bottom-right"
});

view.ui.add([expand1, expand2], "bottom-right");

iconNumber Property iconNumber Number

A number to display at the corner of the widget to indicate the number of, for example, open issues or unread notices.

id Inherited Property id String: The unique ID assigned to the widget when the widget is created. If not set by the developer, it will default to the container ID, or if that is not present then it will be automatically generated.

: The widget's default label.

Since: ArcGIS Maps SDK for JavaScript 4.7 Expand since 4.3, mode added at 4.7.

The mode in which the widget displays. These modes are listed below.

mode description auto This is the default mode. It is responsive to browser size changes and will update based on whether the widget is viewed in a desktop or mobile application. floating Use this mode if you wish to always display the widget as floating regardless of browser size. drawer Use this mode if you wish to always display the widget in a panel regardless of browser size.

Possible Values:"auto" |"floating" |"drawer"

Since: ArcGIS Maps SDK for JavaScript 4.30 Expand since 4.3, placement added at 4.30.

The placement used by the calcite popover when the widget is expanded.

: A reference to the MapView or SceneView. Set this to link the widget to a specific view.

: The view model for this widget. This is a class that contains all the logic (properties and methods) that controls this widget's behavior. See the ExpandViewModel class to access all properties and methods on the widget.

visible Inherited Property visible Boolean

Indicates whether the widget is visible.

If false, the widget will no longer be rendered in the web document. This may affect the layout of other elements or widgets in the document. For example, if this widget is the first of three widgets associated to the upper right hand corner of the view UI, then the other widgets will reposition when this widget is made invisible. For more information, refer to the css display value of "none".

Example

// Hides the widget in the view
widget.visible = false;

Method Overview

Show inherited methods Hide inherited methods

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

classes Inherited Method classes(classNames){String} Since: ArcGIS Maps SDK for JavaScript 4.7 Widget since 4.2, classes added at 4.7.

A utility method used for building the value for a widget's class property. This aids in simplifying css class setup.

Returns

Type Description String The computed class name.

Example

// .tsx syntax showing how to set css classes while rendering the widget

render() {
  const dynamicClasses = {
    [css.flip]: this.flip,
    [css.primary]: this.primary
  };

  return (
    <div class={classes(css.root, css.mixin, dynamicClasses)} />
  );
}

collapse Method collapse(): Collapse the widget.

destroy Inherited Method destroy(): Destroys the widget instance.

emit Inherited Method emit(type, event){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.5 Widget since 4.2, emit added at 4.5.

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters

The name of the event.

optional

The event payload.

Returns

Type Description Boolean true if a listener was notified

hasEventListener Inherited Method hasEventListener(type){Boolean}

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

Returns

Type Description Boolean Returns true if the class supports the input event.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type Description Boolean Returns true if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

isFulfilled Inherited Method isFulfilled(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isFulfilled added at 4.19.

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 Inherited Method isRejected(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isRejected added at 4.19.

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 Inherited Method isResolved(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isResolved added at 4.19.

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 Inherited Method on(type, listener){Object}

Registers an event handler on the instance. Call this method to hook an event with a listener.

Returns

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

Example

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

postInitialize Inherited Method postInitialize(): Executes after widget is ready for rendering.

removeHandles Inherited Method removeHandles(groupKey) Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

render Inherited Method render(){Object}

This method is implemented by subclasses for rendering.

Returns

Type Description Object The rendered virtual node.

renderNow Inherited Method renderNow(): Renders widget to the DOM immediately.

scheduleRender Inherited Method scheduleRender(): Schedules widget rendering. This method is useful for changes affecting the UI.

: Toggle the widget by expanding it if it's collapsed, or collapsing it if it's expanded.

when Inherited Method when(callback, errback){Promise} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, when added at 4.19.

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

optional

The function to call when the promise resolves.

optional

The function to execute when the promise fails.

Returns

Type Description Promise Returns a new Promise for the result of callback.

Example

// Although this example uses the BasemapGallery widget, any class instance that is a promise may use when() in the same way
let bmGallery = new BasemapGallery();
bmGallery.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
});

Type Definitions

DomNodeOwner Type Definition DomNodeOwner: A dom node owner.

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