Slider | API Reference | ArcGIS Maps SDK for JavaScript 4.31

A slider widget that can be used for filtering data, or gathering numeric input from a user. The slider can have multiple thumbs, and provides you with the ability to format labels and control user input.

See the image below for a summary of the configurable options available on this slider.

Slider with annotations

At a minimum, the slider's container or parent container must have a width set in CSS for it to render.

See also

Example

const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ],
  snapOnClickEnabled: false,
  visibleElements: {
    labels: true,
    rangeLabels: true
  }
});

Constructors

Slider Constructor new Slider(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 slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ]
});

Property Overview

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

Show inherited properties

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Type	Summary	Class
String\|HTMLElement	The ID or node representing the DOM element containing the widget.	Widget
String	The name of the class.	Accessor
Boolean	When `true`, sets the slider to a disabled state so the user cannot interact with it.	Slider
Boolean	Indicates if the user can drag the segment between thumbs to update thumb positions.	Slider
Number	When set, the user is restricted from moving slider thumbs to positions higher than this value.	Slider
Number	When set, the user is restricted from moving slider thumbs to positions less than this value.	Slider
Collection<HTMLElement>	The HTML Element nodes representing the slider segment between the min and effectiveMin, and the segment between the effectiveMax and max.	Slider
String	Icon displayed in the widget's button.	Slider
String	The unique ID assigned to the widget when the widget is created.	Widget
InputCreatedFunction	A function that provides the developer with access to the input elements when rangeLabelInputsEnabled and/or labelInputsEnabled are set to `true`.	Slider
LabelFormatter	A function used to format user inputs.	Slider
InputParser	Function used to parse slider inputs formatted by the inputFormatFunction.	Slider
String	The widget's default label.	Slider
Collection<HTMLElement>	The HTML Element nodes representing labels attached to slider thumbs.	Slider
LabelFormatter	A function used to format labels.	Slider
Boolean	Indicates whether to enable editing input values via keyboard input when the user clicks a label.	Slider
String []	An array of strings associated with 'values' generated using an internal label formatter or the values returned from labelFormatFunction.	Slider
String	Determines the layout/orientation of the Slider widget.	Slider
Number	The maximum possible data/thumb value of the slider.	Slider
HTMLElement	The HTML Element node representing the max value label.	Slider
Number	The minimum possible data/thumb value of the slider.	Slider
HTMLElement	The HTML Element node representing the min value label.	Slider
Number	Defines how slider thumb values should be rounded.	Slider
Boolean	Indicates whether to enable editing range values via keyboard input when the user clicks a min or max label.	Slider
Collection<HTMLElement>	The HTML Element nodes representing interactive slider segments.	Slider
Boolean	Indicates if the closest thumb will snap to the clicked location on the track.	Slider
String	The current state of the widget.	Slider
Number\|Number []	Sets steps, or intervals, on the slider that restrict user input to specific values.	Slider
Boolean	When `true`, all segments will sync together in updating thumb values when the user drags any segment.	Slider
ThumbCreatedFunction	Function that executes each time a thumb is created on the slider.	Slider
Collection<HTMLElement>	The HTML Element nodes representing slider thumbs.	Slider
Boolean	When `false`, the user can freely move any slider thumb to any position along the track.	Slider
TickConfig []	When set, renders ticks along the slider track.	Slider
Collection<Collection<TickElementGroup>>	The HTML Element nodes representing slider ticks and their associated labels.	Slider
HTMLElement	The HTML Element node representing the slider track.	Slider
Number []	An array of numbers representing absolute thumb positions on the slider.	Slider
SliderViewModel	The view model for the Slider widget.	Slider
Boolean	Indicates whether the widget is visible.	Widget
VisibleElements	The visible elements that are displayed within the widget.	Slider

Property Details

container Inherited Property container String |HTMLElement Inherited from Widget

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"
});

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

disabled Property disabled Boolean

When true, sets the slider to a disabled state so the user cannot interact with it.

Default Value:false

draggableSegmentsEnabled Property draggableSegmentsEnabled Boolean

Indicates if the user can drag the segment between thumbs to update thumb positions.

Default Value:true

Example

// disables draggable segments
slider.draggableSegmentsEnabled = false;

effectiveMax Property effectiveMax Number Since: ArcGIS Maps SDK for JavaScript 4.23 Slider since 4.12, effectiveMax added at 4.23.

When set, the user is restricted from moving slider thumbs to positions higher than this value. This value should be less than the slider max. The effectiveMax and effectiveMin allow you to represent ranges of values in a dataset that cannot be filtered or selected with the slider. This can be useful when using the slider to represent datasets with outliers, or scale ranges not suitable for a layer.

Example

// slider.max = 100
slider.effectiveMax = 60;
// now the user cannot slide thumbs above
// 60 even though the slider track displays
// values up to 100.

effectiveMin Property effectiveMin Number Since: ArcGIS Maps SDK for JavaScript 4.23 Slider since 4.12, effectiveMin added at 4.23.

When set, the user is restricted from moving slider thumbs to positions less than this value. This value should be greater than the slider min. The effectiveMin and effectiveMax allow you to represent ranges of values in a dataset that cannot be filtered or selected with the slider. This can be useful when using the slider to represent datasets with outliers, or scale ranges not suitable for a layer.

Example

// slider.min = 0
slider.effectiveMin = 4;
// now the user cannot slide thumbs below
// 4 even though the slider track displays
// values down to 0.

effectiveSegmentElements Property effectiveSegmentElements Collection<HTMLElement>readonly Since: ArcGIS Maps SDK for JavaScript 4.23 Slider since 4.12, effectiveSegmentElements added at 4.23.

The HTML Element nodes representing the slider segment between the min and effectiveMin, and the segment between the effectiveMax and max. You can use this property to customize the style and attach event handlers to these segments. This only applies to sliders where the effectiveMin and effectiveMax are specified.

Example

slider.effectiveSegmentElements.forEach( segmentElement => segmentElement.classList.add("redLine") );

icon Property icon String Since: ArcGIS Maps SDK for JavaScript 4.27 Slider since 4.12, icon added at 4.27.

Icon displayed in the widget's button.

Default Value:"caret-double-horizontal"

See also

Calcite Icon Search

id Inherited Property id String Inherited from Widget

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.

inputCreatedFunction Property inputCreatedFunction InputCreatedFunction

A function that provides the developer with access to the input elements when rangeLabelInputsEnabled and/or labelInputsEnabled are set to true. This allows the developer to customize the input elements corresponding to slider min/max and thumb values to validate user input. For example, you can access input elements and customize them with type and pattern attributes.

See also

labelInputsEnabled
rangeLabelInputsEnabled

Example

// Sets the slider thumb inputs as number inputs
slider.inputCreatedFunction = function(input, type, index){
  input.setAttribute("type", "number");
  input.setAttribute("pattern", "[0-9]*");
};

inputFormatFunction Property inputFormatFunction LabelFormatter

A function used to format user inputs. As opposed to labelFormatFunction, which formats thumb labels, the inputFormatFunction formats thumb values in the input element when the user begins to edit them.

The image below demonstrates how slider input values resemble corresponding slider values by default and won't match the formatting set in labelFormatFunction.

Slider without input formatter

If you want to format slider input values so they match thumb labels, you can pass the same function set in labelFormatFunction to inputFormatFunction for consistent formatting.

Slider with input formatter

However, if an inputFormatFunction is specified, you must also write a corresponding inputParseFunction to parse user inputs to understandable slider values. In most cases, if you specify an inputFormatFunction, you should set the labelFormatFunction to the same value for consistency between labels and inputs.

This property overrides the default input formatter, which formats by calling toString() on the input value.

See also

inputParseFunction

Example

// Formats the slider input to abbreviated numbers with units
// e.g. a thumb at position 1500 will render with an input label of 1.5k
slider.inputFormatFunction = function(value, type){
  if(value >= 1000000){
    return (value / 1000000).toPrecision(3) + "m"
  }
  if(value >= 100000){
    return (value / 1000).toPrecision(3) + "k"
  }
  if(value >= 1000){
    return (value / 1000).toPrecision(2) + "k"
  }
  return value.toFixed(0);
}

inputParseFunction Property inputParseFunction InputParser

Function used to parse slider inputs formatted by the inputFormatFunction. This property must be set if an inputFormatFunction is set. Otherwise the slider values will likely not update to their expected positions.

Overrides the default input parses, which is a parsed floating point number.

See also

inputFormatFunction

Example

// Parses the slider input (a string value) to a number value understandable to the slider
// This assumes the slider was already configured with an inputFormatFunction
// For example, if the input is 1.5k this function will parse
// it to a value of 1500
slider.inputParseFunction = function(value, type, index){
  let charLength = value.length;
  let valuePrefix = parseFloat(value.substring(0,charLength-1));
  let finalChar = value.substring(charLength-1);

  if(parseFloat(finalChar) >= 0){
    return parseFloat(value);
  }
  if(finalChar === "k"){
    return valuePrefix * 1000;
  }
  if(finalChar === "m"){
    return valuePrefix * 1000000;
  }
  return value;
}

label Property label String

The widget's default label. This label displays when it is used within another widget, such as the Expand or LayerList widgets.

labelElements Property labelElements Collection<HTMLElement>readonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, labelElements added at 4.20.

The HTML Element nodes representing labels attached to slider thumbs. You can use this property to customize the style of labels and attach event handlers to each element.

Example

slider.labelElements.forEach( labelElement => labelElement.classList.add("newStyle") );

labelFormatFunction Property labelFormatFunction LabelFormatter

A function used to format labels. Overrides the default label formatter.

By default labels are formatted in the following way:

When the data range is less than 10 ((max - min) < 10), labels are rounded based on the value set in the precision property.
When the data range is larger than 10, labels display with a precision of no more than two decimal places, though actual slider thumb values will maintain the precision specified in precision.

Use this property to override the behavior defined above.

Example

// For thumb values, rounds each label to whole numbers.
// Note the actual value of the thumb continues to be stored
// based on the indicated data `precision` despite this formatting
slider.labelFormatFunction = function(value, type) {
  return (type === "value") ? value.toFixed(0) : value;
}

labelInputsEnabled Property labelInputsEnabled Boolean

Indicates whether to enable editing input values via keyboard input when the user clicks a label. This allows the user to move the slider thumb to precise values without sliding the thumbs.

Slider editable labels

Default Value:false

Example

// allows the slider input label to be used for keyboard input
slider.labelInputsEnabled = true;

labels Property labels String[]readonly

An array of strings associated with 'values' generated using an internal label formatter or the values returned from labelFormatFunction.

layout Property layout String

Determines the layout/orientation of the Slider widget. By default, the slider will render horizontally with the min value on the left side of the track. The possible values are described below.

horizontal

Slider horizontal not reversed

horizontal-reversed

When the slider is set to horizontal-reversed, the max value will render on the left side and the min on the right.

Slider horizontal reversed

vertical

When the slider is set to vertical, the max value will render on the top of the track and the min on the bottom.

Slider vertical not reversed

vertical-reversed

When the slider is set to vertical-reversed, the max value will render on the bottom of the track and the min on the top.

Slider vertical reversed

Possible Values:"horizontal" |"horizontal-reversed" |"vertical" |"vertical-reversed"

Default Value:"horizontal"

Example

slider.layout = "vertical";

max Property max Number

The maximum possible data/thumb value of the slider. In the constructor, if one of the values specified in values is greater than the max value specified in this property, then the max will update to the highest value in values.

To display the max value's label on the slider, set visibleElements.rangeLabels to true. To allow the end user to modify the max value, set rangeLabelInputsEnabled to true.

See also

rangeLabelInputsEnabled
visibleElements

Example

const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ]
});

maxLabelElement Property maxLabelElement HTMLElementreadonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, maxLabelElement added at 4.20.

The HTML Element node representing the max value label. You can use this property to customize the style and attach event handlers.

Examples

slider.maxLabelElement.classList.add('maxClass');

slider.maxLabelElement.addEventListener('click', () => {
  slider.values = [ slider.max ];
});

min Property min Number

The minimum possible data/thumb value of the slider. In the constructor, if one of the values specified in values is less than the min value specified in this property, then the min will update to the lowest value in values.

To display the min value's label on the slider, set visibleElements.rangeLabels to true. To allow the end user to modify the min value, set rangeLabelInputsEnabled to true.

See also

rangeLabelInputsEnabled
visibleElements

Example

const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ]
});

minLabelElement Property minLabelElement HTMLElementreadonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, minLabelElement added at 4.20.

The HTML Element node representing the min value label. You can use this property to customize the style and attach event handlers.

Examples

slider.minLabelElement.classList.add('minClass');

slider.minLabelElement.addEventListener('click', () => {
  slider.values = [ slider.min ];
});

precision Property precision Number

Defines how slider thumb values should be rounded. This number indicates the number of decimal places slider thumb values should round to when they have been moved.

This value also indicates the precision of thumb labels when the data range is less than 10 (i.e. (max - min) < 10).

When the data range is larger than 10, labels display with a precision of no more than two decimal places, though actual slider thumb values will maintain the precision specified in this property.

For example, given the default precision of 4, and the following slider configuration, The labels of the thumbs will display two decimal places, but the precision of the actual thumb values will not be lost even when the user slides or moves the thumb.

const slider = new Slider({
  min: 20,
  max: 100,  // data range of 80
  values: [50.4331],
  // thumb label will display 50.43
  // thumb value will maintain precision, so
  // value will remain at 50.4331
  container: "sliderDiv"
});

If the user manually enters a value that has a higher precision than what's indicated by this property, the precision of that thumb value will be maintained until the thumb is moved by the user. At that point, the value will be rounded according to the indicated precision.

If thumb labels aren't visible, they must be enabled with labelInputsEnabled.

Keep in mind this property rounds thumb values and shouldn't be used exclusively for formatting purposes. To format thumb labels, use the labelFormatFunction property.

Default Value:4

Example

slider.precision = 7;

rangeLabelInputsEnabled Property rangeLabelInputsEnabled Boolean

Indicates whether to enable editing range values via keyboard input when the user clicks a min or max label. This allows the user to increase or decrease the data range of the slider.

Slider editable range labels

Default Value:false

Example

slider.rangeLabelInputsEnabled = false;

segmentElements Property segmentElements Collection<HTMLElement>readonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, segmentElements added at 4.20.

The HTML Element nodes representing interactive slider segments. Segments are interactive when situated between two thumbs. You can use this property to customize the style and attach event handlers to segments.

Example

slider.segmentElements.forEach( segmentElement => segmentElement.classList.add("thickLine") );

snapOnClickEnabled Property snapOnClickEnabled Boolean

Indicates if the closest thumb will snap to the clicked location on the track.

Default Value:true

Example

// disables snapping thumb values by click
slider.snapOnClickEnabled = false;

state Property state Stringreadonly

The current state of the widget.

Possible Values:"ready" |"disabled" |"editing" |"dragging"

steps Property steps Number |Number[]

Sets steps, or intervals, on the slider that restrict user input to specific values. If an array of numbers is passed to this property, the slider thumbs may only be moved to the positions specified in the array.

If a single number is set, then steps are set along the entire slider range at an interval of the provided value. In this scenario, the user may only slide the thumbs to values at the provided interval. For example, if a value of 0.5 is set here, and the slider min is 0 and the slider max is 10, then the user will only be able to update the thumbs to values of 0, 0.5, 1.0, 1.5, 2.0, etc.

Examples

// set steps at an interval of 0.5. So the
// slider thumb snaps at values of 0.5, 1.0, 1.5, etc.
slider.steps = 0.5;

// Set steps at specific slider positions
slider.steps = [ 5, 10, 15, 20, 25, 30, 35, 40 ];

syncedSegmentsEnabled Property syncedSegmentsEnabled Boolean Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, syncedSegmentsEnabled added at 4.20.

When true, all segments will sync together in updating thumb values when the user drags any segment. This maintains the interval between all thumbs when any segment is dragged. Only applicable when draggableSegmentsEnabled is true.

Default Value:false

Example

slider.draggableSegmentsEnabled = true;
slider.syncedSegmentsEnabled = true;

thumbCreatedFunction Property thumbCreatedFunction ThumbCreatedFunction

Function that executes each time a thumb is created on the slider. This can be used to add custom styling to each thumb or hook event listeners to specific thumbs.

Example

slider.thumbCreatedFunction = function(index, value, thumbElement) {
  thumbElement.classList.add("change-color");
  thumbElement.addEventListener("focus", function() {
    // add custom behavior here...tooltips, fire other actions, etc.
  });
});

thumbElements Property thumbElements Collection<HTMLElement>readonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, thumbElements added at 4.20.

The HTML Element nodes representing slider thumbs. You can use this property to customize the style of thumbs and attach event handlers to each thumb.

Example

slider.thumbElements.forEach( thumbElement => thumbElement.classList.add("greenThumb") );

thumbsConstrained Property thumbsConstrained Boolean

When false, the user can freely move any slider thumb to any position along the track. By default, a thumb's position is constrained to the positions of neighboring thumbs so you cannot move one thumb past another. Set this property to false to disable this constraining behavior.

Default Value:true

Example

// allows the user to freely move slider
// thumbs to any position along the track
slider.thumbsConstrained = false;

tickConfigs Property tickConfigs TickConfig[]

When set, renders ticks along the slider track. See the TickConfig documentation for more information on how to configure tick placement, style, and behavior.

Examples

// places 25 ticks on the slider track
// evenly spaced from one another
slider.tickConfigs = [{
  mode: "count",
  values: 25
}];

// places ticks spanning the width of
// the slider at 20% intervals from one another
// this is the equivalent of setting mode to 'count'
// and the values to 5.
slider.tickConfigs = [{
  mode: "percent",
  values: 20
}];

// Places three ticks on the slider: one positioned
// 10% of the width from the start (or min value), another
// directly in the middle (50% from the start), and
// another 90% of the width from the start of the slider.
// Because the values are %s the values are always relative
// regardless of the range of the slider values.
slider.tickConfigs = [{
  mode: "percent",
  values: [ 10, 50, 90 ]
}];

// Places 5 ticks on the slider at the slider values
// provided below. These are absolute positions.
slider.tickConfigs = [{
  mode: "position",
  values: [ 0, 5, 10, 15, 20 ]
}];

// Places a single tick at the location of the value of 5.
slider.tickConfigs = [{
  mode: "position",
  values: 5
}];

// Renders three groups of ticks. The first is a basic set
// of 25 ticks. The second places 4 ticks and adds custom
// CSS classes to modify their styling. The third adds
// a click event handler to the tick labels.
slider.tickConfigs = [{
  mode: "count",
  values: 25
}, {
  mode: "percent",
  values: [12.5, 37.5, 62.5, 87.5],
  labelsVisible: true,
  tickCreatedFunction: function(initialValue, tickElement, labelElement) {
    tickElement.classList.add("mediumTicks");
    labelElement.classList.add("mediumLabels");
  }
}, {
  mode: "count",
  values: 5,
  labelsVisible: true,
  tickCreatedFunction: function(initialValue, tickElement, labelElement) {
    tickElement.classList.add("largeTicks");
    labelElement.classList.add("largeLabels");
    labelElement.onclick = function() {
      const newValue = labelElement["data-value"];
      slider.values = [ newValue ];
    };
  }
}];

tickElements Property tickElements Collection<Collection<TickElementGroup>>readonly Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, tickElements added at 4.20.

The HTML Element nodes representing slider ticks and their associated labels. These elements are created in TickCreatedFunction and configured in tickConfigs.

Example

slider.tickElements.at(0).forEach((tickElementGroup) => {
  const { tickElement, labelElement } = tickElementGroup;
  const newValue = labelElement["data-value"];
  const setValue = () => {
    slider.values = [ newValue ];
  };
  tickElement.addEventListener("click", setValue);
  tickElement.style.cursor = "pointer";
  labelElement.addEventListener("click", setValue);
  labelElement.style.cursor = "pointer";
});

trackElement Property trackElement HTMLElement

The HTML Element node representing the slider track. Use this property to attach event listeners to the track or to customize the track's CSS.

Example

// Add CSS class to the track
slider.trackElement.classList.add("thickTrack");

values Property values Number[]

An array of numbers representing absolute thumb positions on the slider.

See also

SliderViewModel.setValue()

Example

const slider = new Slider({
  min: 20,
  max: 100,  // data range of 80
  values: [50.4331],
  // thumb label will display 50.43
  // thumb value will maintain precision, so
  // value will remain at 50.4331
  container: "sliderDiv"
});

viewModel Property viewModel SliderViewModel

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

visible Inherited Property visible Boolean Inherited from Widget

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".

Default Value:true

Example

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

visibleElements Property visibleElements VisibleElements Since: ArcGIS Maps SDK for JavaScript 4.15 Slider since 4.12, visibleElements added at 4.15.

The visible elements that are displayed within the widget. This property provides the ability to turn individual elements of the widget's display on/off.

Example

slider.visibleElements = {
  labels: true,
  rangeLabels: true
};

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
String	A utility method used for building the value for a widget's `class` property.	Widget
	Destroys the widget instance.	Widget
Boolean	Emits an event on the instance.	Widget
Boolean	Indicates whether there is an event listener on the instance that matches the provided event name.	Widget
Boolean	Returns true if a named group of handles exist.	Accessor
Boolean	`isFulfilled()` may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected).	Widget
Boolean	`isRejected()` may be used to verify if creating an instance of the class is rejected.	Widget
Boolean	`isResolved()` may be used to verify if creating an instance of the class is resolved.	Widget
Object	Registers an event handler on the instance.	Widget
	Adds one or more handles which are to be tied to the lifecycle of the widget.	Widget
	Executes after widget is ready for rendering.	Widget
	Removes a group of handles owned by the object.	Accessor
Object	This method is implemented by subclasses for rendering.	Widget
	Renders widget to the DOM immediately.	Widget
	Schedules widget rendering.	Widget
Promise	`when()` may be leveraged once an instance of the class is created.	Widget

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor 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

handleOrHandles WatchHandle|WatchHandle []

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} Inherited from Widget

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

Parameter

classNames String|String []|Object

repeatable

The class names.

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)} />
  );
}

destroy Inherited Method destroy() Inherited from Widget

Destroys the widget instance.

emit Inherited Method emit(type, event){Boolean} Inherited from Widget

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

Parameters

type String

The name of the event.

event Object

optional

The event payload.

Returns

Type	Description
Boolean	`true` if a listener was notified

hasEventListener Inherited Method hasEventListener(type){Boolean} Inherited from Widget

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

Parameter

type String

The name of the event.

Returns

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

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor 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} Inherited from Widget 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} Inherited from Widget 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} Inherited from Widget 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} Inherited from Widget

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

Parameters

type String|String []

An event or an array of events to listen for.

listener Function

The function to call when the event fires.

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);
});

own Inherited Method own(handleOrHandles) Inherited from Widget Since: ArcGIS Maps SDK for JavaScript 4.24 Widget since 4.2, own added at 4.24. Deprecated since 4.28 Use addHandles() instead.

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

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

this.own(handle); // Handle gets removed when the widget is destroyed.

Parameter

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the widget is destroyed.

postInitialize Inherited Method postInitialize() Inherited from Widget

Executes after widget is ready for rendering.

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor 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} Inherited from Widget

This method is implemented by subclasses for rendering.

Returns

Type	Description
Object	The rendered virtual node.

renderNow Inherited Method renderNow() Inherited from Widget

Renders widget to the DOM immediately.

scheduleRender Inherited Method scheduleRender() Inherited from Widget

Schedules widget rendering. This method is useful for changes affecting the UI.

when Inherited Method when(callback, errback){Promise} Inherited from Widget 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

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`.

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

Bounds Type Definition Bounds Object

Represents the effective bounds of the slider.

Properties: min Number

The effective min value of the slider, or the minimum value a user can set a thumb on the slider.

max Number

The effective max value of the slider, or the maximum value a user can set a thumb on the slider.

InputCreatedFunction Type Definition InputCreatedFunction(inputElement, type, thumbIndex)

Function that executes each time an input element is created. It allows the developer to validate a user's manually entered slider thumb values. This function should be set to the inputCreatedFunction property.

Parameters

inputElement HTMLInputElement

The HTMLInputElement allowing the user to manually input slider thumb values. You can customize this element to validate user input, for example by setting the type and pattern attributes.

type String

The type of input created.

Possible Values:"max"|"min"|"thumb"

thumbIndex Number

optional

The index of the thumb corresponding to the input element.

InputParser Type Definition InputParser(value, type, index){Number}

Function definition for the inputParseFunction property. It fires each time the user modifies slider input by key entry.

Parameters

value String

The formatted input value of the thumb to be parsed.

type String

optional

The label type. Valid types include average, min, max, tick, and value.

Possible Values:"average"|"min"|"max"|"tick"|"value"

index Number

optional

The index of the thumb (or value).

Returns

Type	Description
Number	The parsed number value of the thumb.

LabelFormatter Type Definition LabelFormatter(value, type, index){String}

Function used to format labels. This function should be set to the labelFormatFunction property. It fires each time a label is created or updated on the slider.

Parameters

value Number

The value of the thumb to be labeled.

type String

optional

The label type. Valid types include average, min, max, tick, and value.

Possible Values:"average"|"min"|"max"|"tick"|"value"

index Number

optional

The index of the thumb (or value).

Returns

Type	Description
String	The formatted value of the label.

ThumbCreatedFunction Type Definition ThumbCreatedFunction(index, value, thumbElement, labelElement)

Function that executes each time a thumb is created on the slider. This function should be set to the thumbCreatedFunction property.

Parameters

index Number

The index of the thumb when the Slider was constructed.

value Number

The value of the slider where the thumb is rendered.

thumbElement HTMLElement

The HTMLElement representing the thumb. You can add or modify the default style of individual thumbs by adding CSS classes to this element. You can also add custom behavior to thumbs by attaching event listeners to individual elements.

labelElement HTMLElement

optional

The HTMLElement representing the label of the thumb. You can add or modify the default style of the thumb's labels by adding CSS classes to this element. You can also add custom behavior to thumb labels by attaching event listeners to individual elements.

TickConfig Type Definition TickConfig

Object specification for configuring ticks on the slider. An array of these objects should be set on the tickConfigs property.

Properties: mode String

The mode or method of positioning ticks along the slider track. See the table below for a list of possible values.

Possible Value Description

count Places a fixed number of ticks (provided in the values property) at equal distances from each other below the slider track.

percent When set, and a single number is set on the values property, ticks will be placed at the specified percentage interval along the length of the slider. For example, when mode is percent and values is 5, then 20 ticks will be placed below the slider track (at 5-percent intervals from each other). If an array of values is provided, the values are interpreted as percentages along the slider. So if values is [10, 50, 90], then three ticks will be placed below the track; one at the midway point, and two 10 percent of the length from either end of the slider.

position Indicates that ticks will only be placed at the values specified in the values property.

Possible Values:"count"|"percent"|"position"

values Number|Number []

Indicates where ticks will be rendered below the track. See the description for mode for more information about how this property is interpreted by each mode.

labelsVisible Boolean

optional
Indicates whether to render labels for the ticks.

tickCreatedFunction TickCreatedFunction

optional
Callback that fires for each tick. You can override default behaviors and styles with this property.

labelFormatFunction LabelFormatter

optional
Callback for formatting tick labels.

Examples

// places 25 ticks on the slider track
// evenly spaced from one another
slider.tickConfigs = [{
  mode: "count",
  values: 25
}];

// places ticks spanning the width of
// the slider at 20% intervals from one another
// this is the equivalent of setting mode to 'count'
// and the values to 5.
slider.tickConfigs = [{
  mode: "percent",
  values: 20
}];

// Places three ticks on the slider: one positioned
// 10% of the width from the start (or min value), another
// directly in the middle (50% from the start), and
// another 90% of the width from the start of the slider.
// Because the values are %s the values are always relative
// regardless of the range of the slider values.
slider.tickConfigs = [{
  mode: "percent",
  values: [ 10, 50, 90 ]
}];

// Places 5 ticks on the slider at the slider values
// provided below. These are absolute positions.
slider.tickConfigs = [{
  mode: "position",
  values: [ 0, 5, 10, 15, 20 ]
}];

// Places a single tick at the location of the value of 5.
slider.tickConfigs = [{
  mode: "position",
  values: 5
}];

// Renders three groups of ticks. The first is a basic set
// of 25 ticks. The second places 4 ticks and adds custom
// CSS classes to modify their styling. The third adds
// a click event handler to the tick labels.
slider.tickConfigs = [{
  mode: "count",
  values: 25
}, {
  mode: "percent",
  values: [12.5, 37.5, 62.5, 87.5],
  labelsVisible: true,
  tickCreatedFunction: function(initialValue, tickElement, labelElement) {
    tickElement.classList.add("mediumTicks");
    labelElement.classList.add("mediumLabels");
  }
}, {
  mode: "count",
  values: 5,
  labelsVisible: true,
  tickCreatedFunction: function(initialValue, tickElement, labelElement) {
    tickElement.classList.add("largeTicks");
    labelElement.classList.add("largeLabels");
    labelElement.onclick = function() {
      const newValue = labelElement["data-value"];
      slider.values = [ newValue ];
    };
  }
}];

TickCreatedFunction Type Definition TickCreatedFunction(value, tickElement, labelElement)

Function that fires each time a tick is created. It provides you access to each tick element so you can add custom CSS and attach event listeners to individual ticks. This function should be set to the tickCreatedFunction property of the TickConfig.

Parameters

value Number

The value of the slider where the tick is rendered.

tickElement HTMLElement

The HTMLElement representing the tick. You can add or modify the default style of individual ticks by adding CSS classes to this element. You can also add custom behavior to ticks by attaching event listeners to individual elements.

labelElement HTMLElement

optional

The HTMLElement representing the label of the tick. You can add or modify the default style of the tick's labels by adding CSS classes to this element. You can also add custom behavior to tick labels by attaching event listeners to individual elements.

TickElementGroup Type Definition TickElementGroup Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, TickElementGroup added at 4.20.

The HTML Element nodes representing a single slider tick and its associated label.

Properties: tickElement HTMLElement

optional
The HTMLElement representing a tick. You can add or modify the style of a tick by adding CSS classes to this element. You can also attach event listeners to this element.

labelElement HTMLElement

optional
The HTMLElement representing the label associated with the tick element. You can add or modify the style of a tick label by adding CSS classes to this element. You can also attach event listeners to this element.

VisibleElements Type Definition VisibleElements

The visible elements that are displayed within the widget. This provides the ability to turn individual elements of the widget's display on/off. Alternatively, developers may also use CSS (e.g. display: none) to show/hide elements, such as labels.

Properties: labels Boolean

optional
Default Value:false

Indicates whether to display labels for slider thumbs. By default, labels display input thumb values as floating point values with a precision of two digits. The format of labels can be customized via the labelFormatFunction.

rangeLabels Boolean

optional
Default Value:false

Indicates whether to display min or max range values on the slider. The format of labels can be customized via the labelFormatFunction.

Event Overview

Type	Summary	Class
{oldValue: Number,type: "max-change",value: Number}	Fires when a user changes the max value of the slider.	Slider
{type: "max-click",value: Number}	Fires when a user clicks the max label element.	Slider
{oldValue: Number,type: "min-change",value: Number}	Fires when a user changes the min value of the slider.	Slider
{type: "min-click",value: Number}	Fires when a user clicks the min label element.	Slider
{index: Number,thumbIndices: Number [],type: "segment-click",value: Number}	Fires when a user clicks a segment element on the slider.	Slider
{index: Number,state: "start"\|"drag",type: "segment-drag",thumbIndices: Number []}	Fires when a user drags a segment of the slider.	Slider
{index: Number,oldValue: Number,type: "thumb-change",value: Number}	Fires when a user changes the value of a thumb via the arrow keys or by keyboard editing of the label on the slider.	Slider
{index: Number,type: "thumb-click",value: Number}	Fires when a user clicks a thumb element.	Slider
{index: Number,state: "drag"\|"start"\|"stop",type: "thumb-drag",value: Number}	Fires when a user drags a thumb on the Slider widget.	Slider
{type: "tick-click",value: Number,configIndex: Number,groupIndex: Number}	Fires when a user clicks a tick or its associated label.	Slider
{type: "track-click",value: Number}	Fires when a user clicks the track element.	Slider

Event Details

max-change Event max-change

Fires when a user changes the max value of the slider.

Properties: oldValue Number

The former max value (or bound) of the slider.

type String

The type of the event.

The value is always "max-change".

value Number

The max value (or bound) of the slider when the event is emitted.

max-click Event max-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, max-click added at 4.20.

Fires when a user clicks the max label element.

Properties: type String

The type of the event.

The value is always "max-click".

value Number

The max value of the slider.

min-change Event min-change

Fires when a user changes the min value of the slider.

Properties: oldValue Number

The former min value (or bound) of the slider.

type String

The type of the event.

The value is always "min-change".

value Number

The the min value (or bound) of the slider when the event is emitted.

min-click Event min-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, min-click added at 4.20.

Fires when a user clicks the min label element.

Properties: type String

The type of the event.

The value is always "min-click".

value Number

The min value of the slider.

segment-click Event segment-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, segment-click added at 4.20.

Fires when a user clicks a segment element on the slider. A segment is a portion of the track that lies between two thumbs. This only applies when two or more thumbs are set on the slider.

Properties: index Number

The 1-based index of the segment on the slider.

thumbIndices Number []

The indices of the thumbs on each end of the segment.

type String

The type of the event.

The value is always "segment-click".

value Number

The approximate value of the slider at the location of the click event.

segment-drag Event segment-drag

Fires when a user drags a segment of the slider. A segment is the portion of the track that lies between two thumbs. Therefore, this only applies when two or more thumbs are set on the slider.

Properties: index Number

The 1-based index of the segment in the slider.

state String

The state of the drag.

Possible Values:"start"|"drag"

type String

The type of the event.

The value is always "segment-drag".

thumbIndices Number []

The indices of the thumbs on each end of the segment.

thumb-change Event thumb-change

Fires when a user changes the value of a thumb via the arrow keys or by keyboard editing of the label on the slider.

Properties: index Number

The 0-based index of the updated thumb.

oldValue Number

The former value of the thumb before the change was made.

type String

The type of the event.

The value is always "thumb-change".

value Number

The value of the thumb when the event is emitted.

thumb-click Event thumb-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, thumb-click added at 4.20.

Fires when a user clicks a thumb element.

Properties: index Number

The 0-based index of the thumb.

type String

The type of the event.

The value is always "thumb-click".

value Number

The value of the thumb when the event is emitted.

thumb-drag Event thumb-drag

Fires when a user drags a thumb on the Slider widget.

Properties: index Number

The 0-based index of the updated thumb.

state String

The state of the drag.

Possible Values:"drag"|"start"|"stop"

type String

The type of the event.

The value is always "thumb-drag".

value Number

The value of the thumb when the event is emitted.

tick-click Event tick-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, tick-click added at 4.20.

Fires when a user clicks a tick or its associated label.

Properties: type String

The type of the event.

The value is always "tick-click".

value Number

The approximate value that the tick represents on the slider track.

configIndex Number

The 0-based index of the associated configuration provided in tickConfigs.

groupIndex Number

The 0-based index of the tick and/or group (associated label) relative to other ticks in the same configuration.

track-click Event track-click Since: ArcGIS Maps SDK for JavaScript 4.20 Slider since 4.12, track-click added at 4.20.

Fires when a user clicks the track element.

Properties: type String

The type of the event.

The value is always "track-click".

value Number

The approximate value of the slider at the location of the click event.