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require(["esri/widgets/Slider"], function(Slider) { /* code goes here */ });
Class: esri/widgets/Slider
Inheritance: Slider Widget Accessor
Since: ArcGIS API for JavaScript 4.12

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

For information about gaining full control of widget styles, see the Styling topic.
See also:
Example:
const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ],
  snapOnClickEnabled: false,
  labelsVisible: true,
  rangeLabelsVisible: true
});

Constructors

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 Working with Properties topic.
NameTypeSummaryClass
String|HTMLElement

The ID or node representing the DOM element containing the widget.

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more detailsWidget
String

The name of the class.

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Boolean

When true, this property indicates whether the widget has been destroyed.

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more detailsWidget
Boolean

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

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more detailsSlider
Boolean

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

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more detailsSlider
String

The unique ID assigned to the widget when the widget is created.

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more detailsWidget
LabelFormatter

A function used to format user inputs.

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more detailsSlider
InputParser

Function used to parse slider inputs formatted by the inputFormatFunction.

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more detailsSlider
String

The widget's default label.

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more detailsSlider
LabelFormatter

A function used to format labels.

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more detailsSlider
Boolean

Indicates whether to enable editing input values via keyboard input when the user clicks a label.

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more detailsSlider
String[]

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

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more detailsSlider
Boolean

Indicates whether to display labels alongside slider thumbs.

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more detailsSlider
String

Determines the layout/orientation of the Slider widget.

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more detailsSlider
Number

The maximum possible data/thumb value of the slider.

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more detailsSlider
Number

The minimum possible data/thumb value of the slider.

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more detailsSlider
Number

Defines how slider thumb values should be rounded.

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more detailsSlider
Boolean

Indicates whether to enable editing range values via keyboard input when the user clicks a min or max label.

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Boolean

Indicates whether to display min or max range values on the slider.

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Boolean

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

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String

The current state of the widget.

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more detailsSlider
Number|Number[]

Sets steps, or intervals, on the slider that restrict user input to specific values.

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more detailsSlider
ThumbCreatedFunction

Function that executes each time a thumb is created on the slider.

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more detailsSlider
Boolean

When false, the user can freely move any slider thumb to any position along the track.

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TickConfig[]

When set, renders ticks along the slider track.

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more detailsSlider
HTMLElement

The HTML Element node representing the slider track.

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more detailsSlider
Number[]

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

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more detailsSlider
SliderViewModel

The view model for the Slider widget.

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more detailsSlider

Property Details

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 cases 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 Stringreadonly inherited

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

destroyed Boolean inherited

When true, this property indicates whether the widget has been destroyed.

disabled Boolean

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

Default Value:false
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;

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.

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:
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 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:
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){
  var charLength = value.length;
  var valuePrefix = parseFloat(value.substring(0,charLength-1));
  var 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 String

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

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 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 String[]readonly

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

labelsVisible Boolean

Indicates whether to display labels alongside 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.

Alternatively, developers may also use CSS (e.g. display: none) to show/hide labels.

Default Value:false
Example:
slider.labelsVisible = true;
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 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, then set rangeLabelsVisible to true. To allow the end user to modify the max value, set rangeLabelInputsEnabled to true.

See also:
Example:
const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ]
});
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, then set rangeLabelsVisible to true. To allow the end user to modify the min value, set rangeLabelInputsEnabled to true.

See also:
Example:
const slider = new Slider({
  container: "sliderDiv",
  min: 0,
  max: 100,
  values: [ 50 ]
});
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 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.viewModel.rangeLabelInputsEnabled = false;
rangeLabelsVisible Boolean

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

Alternatively, developers may also use CSS (e.g. display: none) to show/hide labels.

Default Value:false
Example:
slider.viewModel.rangeLabelInputsEnabled = true;
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.viewModel.snapOnClickEnabled = false;
state Stringreadonly

The current state of the widget.

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

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 ];
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.
  };
};
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 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 ];
    };
  }
}];
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 Number[]

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

See also:
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 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.

Method Overview

NameReturn TypeSummaryClass
String

A utility method used for building the value for a widget's class property.

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more detailsWidget

Destroys the widget instance.

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more detailsWidget
Boolean

Emits an event on the instance.

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more detailsWidget
Boolean

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

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more detailsWidget
Object

Registers an event handler on the instance.

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more detailsWidget

Widget teardown helper.

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more detailsWidget

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget
Object

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget

Renders widget to the DOM immediately.

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more detailsWidget

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget

Method Details

classes(classNames){String}inherited

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

Parameter:
classNames Array<(string|Array<string>|Object)>
repeatable

The class names.

Returns:
TypeDescription
StringThe computed class name.
See also:
Example:
// .tsx syntax showing how to set CSS classes while rendering the widget

render() {
  const dynamicIconClasses = {
    [CSS.myIcon]: this.showIcon,
    [CSS.greyIcon]: !this.showIcon
  };

  return (
    <div class={classes(CSS.root, CSS.mixin, dynamicIconClasses)} />
  );
}
destroy()inherited

Destroys the widget instance.

emit(type, event){Boolean}inherited

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:
TypeDescription
Booleantrue if a listener was notified
hasEventListener(type){Boolean}inherited

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:
TypeDescription
BooleanReturns true if the class supports the input event.
on(type, listener){Object}inherited

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

Parameters:

A event type, or an array of event types, to listen for.

listener Function

The function to call when the event is fired.

Returns:
TypeDescription
ObjectReturns an event handler with a remove() method that can be called to stop listening for the event(s).
PropertyTypeDescription
removeFunctionWhen 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(handles)inherited

Widget teardown helper. Any handles added to it will be automatically removed when the widget is destroyed.

Parameter:

Handles marked for removal once the widget is destroyed.

postInitialize()inherited

This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering.

render(){Object}inherited

This method is primarily used by developers when implementing custom widgets. It must be implemented by subclasses for rendering.

Returns:
TypeDescription
ObjectThe rendered virtual node.
renderNow()inherited

Renders widget to the DOM immediately.

scheduleRender()inherited

This method is primarily used by developers when implementing custom widgets. Schedules widget rendering. This method is useful for changes affecting the UI.

Type Definitions

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.

index Number
optional

The index of the thumb (or value).

Returns:
TypeDescription
NumberThe parsed number value of the thumb.
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.

index Number
optional

The index of the thumb (or value).

Returns:
TypeDescription
StringThe formatted value of the label.
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

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

Properties:

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

Possible ValueDescription
countPlaces a fixed number of ticks (provided in the values property) at equal distances from each other below the slider track.
percentWhen 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.
positionIndicates that ticks will only be placed at the values specified in the values property.

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(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.

Event Overview

NameTypeSummaryClass
{oldValue: Number,type: String,value: Number}

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

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more detailsSlider
{oldValue: Number,type: String,value: Number}

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

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more detailsSlider
{index: Number,state: "start","drag",type: "segment-drag",thumbIndices: Number[]}

Fires when a user drags a segment of the slider.

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more detailsSlider
{index: Number,oldValue: Number,type: String,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.

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more detailsSlider
{index: Number,state: "drag","start","stop",type: "thumb-drag",value: Number}

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

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more detailsSlider
{index: Number,oldValue: Number,type: String,value: Number}

Fires when a thumb value changes on the Slider widget.

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more detailsSlider
{indices: Number[],oldValues: Number[],type: String,values: Number[]}

Fires when the values array changes on the Slider widget.

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more detailsSlider

Event Details

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. For this event, the type is always max-change.

value Number

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

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. For this event, the type is always min-change.

value Number

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

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.

The state of the drag.

The type of the event. For this event, the type is always segment-drag.

thumbIndices Number[]

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

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. For this event, the type is always thumb-change.

value Number

The value of the thumb when the event is emitted.

thumb-drag

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

Properties:
index Number

The 0-based index of the updated thumb.

The state of the drag.

The type of the event. For this event, the type is always thumb-drag.

value Number

The value of the thumb when the event is emitted.

value-change
Deprecated since version 4.13.

Fires when a thumb value changes on the Slider widget.

Properties:
index Number

The 0-based index of the thumb emitting the event.

oldValue Number

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

type String

The type of the event. For this event, the type is always value-change.

value Number

The value of the thumb when the event is emitted.

values-change
Deprecated since version 4.13.

Fires when the values array changes on the Slider widget.

Properties:
indices Number[]
optional

The 0-based indices of the thumbs emitting the event.

oldValues Number[]

The former values of the thumbs before the changes were made.

type String

The type of the event. For this event, the type is always values-change.

values Number[]

The values of the thumbs when the event is emitted.

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