ion-range

shadow

The Range slider lets users select from a range of values by moving the slider knob. By default one knob controls the value of the range. This behavior can be customized using dual knobs.

By default the Range slider has a minimum value of 0 and a maximum value of 100. This can be configured with the min and max properties.

Basic Usage

Range Labels

Labels and custom UI elements can be slotted on either side of the range by adding slot="start" or slot="end" to the element. The element can be any element, such as an ion-label, ion-icon or a div. If the directionality of the document is set to left to right, the contents slotted to the start position will display to the left of the range, where as contents slotted to the end position will display to the right of the range. In right to left (rtl) directionality, the contents slotted to the start position will display to the right of the range, where as contents slotted to the end position` will display to the left of the range.

Dual Knobs

Dual knobs introduce two knob controls that users can use to select a value at a lower and upper bounds. When selected, the Range will emit an ionChange event with a RangeValue, containing the upper and lower values selected.

Pins

The pin attribute will display the value of the Range above the knob when dragged. This allows users to select a specific value within the Range.

With the pinFormatter function, developers can customize the formatting of the range value to the user.

Snapping & Ticks

Ticks show indications for each available value on the Range. In order to use ticks, developers must set both snaps and the ticks property to true.

With snapping enabled, the Range knob will snap to the nearest available value as the knob is dragged and released.

Event Handling

Using ionChange

The ionChange event emits as the Range knob value changes.

Using ionKnobMoveStart and ionKnobMoveEnd

The ionKnobMoveStart event emits when the Range knob begins dragging, whether through mouse drag, touch gesture or keyboard interaction. Inversely, ionKnobMoveEnd emits when the Range knob is released. Both events emit with the RangeValue type and work in combination with the dualKnobs property.

Theming

CSS Custom Properties

Range includes CSS Variables to quickly theme and customize the appearance of the Range component to match your application's design.

CSS Shadow Parts

Range includes CSS Shadow Parts to allow complete customization of specific element nodes within the Range component. CSS Shadow Parts offer the most customization capabilities and are the recommended approach when requiring advance styling with the Range component.

Interfaces

RangeChangeEventDetail

interface RangeChangeEventDetail {
  value: RangeValue;
}

RangeKnobMoveStartEventDetail

interface RangeKnobMoveStartEventDetail {
  value: RangeValue;
}

RangeKnobMoveEndEventDetail

interface RangeKnobMoveEndEventDetail {
  value: RangeValue;
}

RangeCustomEvent

While not required, this interface can be used in place of the CustomEvent interface for stronger typing with Ionic events emitted from this component.

interface RangeCustomEvent extends CustomEvent {
  detail: RangeChangeEventDetail;
  target: HTMLIonRangeElement;
}

Types

RangeValue

type RangeValue = number | { lower: number; upper: number };

Properties

activeBarStart

Description	The start position of the range active bar. This feature is only available with a single knob (dualKnobs="false"). Valid values are greater than or equal to the min value and less than or equal to the max value.
Attribute	active-bar-start
Type	number ｜ undefined
Default	undefined

color

Description	The color to use from your application's color palette. Default options are: "primary", "secondary", "tertiary", "success", "warning", "danger", "light", "medium", and "dark". For more information on colors, see theming.
Attribute	color
Type	"danger" ｜ "dark" ｜ "light" ｜ "medium" ｜ "primary" ｜ "secondary" ｜ "success" ｜ "tertiary" ｜ "warning" ｜ string & Record<never, never> ｜ undefined
Default	undefined

debounce

Description	How long, in milliseconds, to wait to trigger the ionChange event after each change in the range value. This also impacts form bindings such as ngModel or v-model.
Attribute	debounce
Type	number
Default	0

disabled

Description	If true, the user cannot interact with the range.
Attribute	disabled
Type	boolean
Default	false

dualKnobs

Description	Show two knobs.
Attribute	dual-knobs
Type	boolean
Default	false

max

Description	Maximum integer value of the range.
Attribute	max
Type	number
Default	100

min

Description	Minimum integer value of the range.
Attribute	min
Type	number
Default	0

mode

Description	The mode determines which platform styles to use.
Attribute	mode
Type	"ios" ｜ "md"
Default	undefined

name

Description	The name of the control, which is submitted with the form data.
Attribute	name
Type	string
Default	''

pin

Description	If true, a pin with integer value is shown when the knob is pressed.
Attribute	pin
Type	boolean
Default	false

pinFormatter

Description	A callback used to format the pin text. By default the pin text is set to Math.round(value).
Attribute	undefined
Type	(value: number) => string ｜ number
Default	(value: number): number => Math.round(value)

snaps

Description	If true, the knob snaps to tick marks evenly spaced based on the step property value.
Attribute	snaps
Type	boolean
Default	false

step

Description	Specifies the value granularity.
Attribute	step
Type	number
Default	1

ticks

Description	If true, tick marks are displayed based on the step value. Only applies when snaps is true.
Attribute	ticks
Type	boolean
Default	true

value

Description	the value of the range.
Attribute	value
Type	number ｜ { lower: number; upper: number; }
Default	0

Events

Name	Description
ionBlur	Emitted when the range loses focus.
ionChange	Emitted when the value property has changed.
ionFocus	Emitted when the range has focus.
ionKnobMoveEnd	Emitted when the user finishes moving the range knob, whether through mouse drag, touch gesture, or keyboard interaction.
ionKnobMoveStart	Emitted when the user starts moving the range knob, whether through mouse drag, touch gesture, or keyboard interaction.

Methods

No public methods available for this component.

CSS Shadow Parts

Name	Description
bar	The inactive part of the bar.
bar-active	The active part of the bar.
knob	The handle that is used to drag the range.
pin	The counter that appears above a knob.
tick	An inactive tick mark.
tick-active	An active tick mark.

CSS Custom Properties

Name	Description
--bar-background	Background of the range bar
--bar-background-active	Background of the active range bar
--bar-border-radius	Border radius of the range bar
--bar-height	Height of the range bar
--height	Height of the range
--knob-background	Background of the range knob
--knob-border-radius	Border radius of the range knob
--knob-box-shadow	Box shadow of the range knob
--knob-size	Size of the range knob
--pin-background	Background of the range pin (only available in MD mode)
--pin-color	Color of the range pin (only available in MD mode)

Slots

Name	Description
end	Content is placed to the right of the range slider in LTR, and to the left in RTL.
start	Content is placed to the left of the range slider in LTR, and to the right in RTL.