Version: v6

ion-range

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.

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.

Styling

Styling with CSS Variables

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

Styling with 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	`''`

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.

Range Labels​

Dual Knobs​

Pins​

Snapping & Ticks​

Event Handling​

Using ionChange​

Using ionKnobMoveStart and ionKnobMoveEnd​

Styling​

Styling with CSS Variables​

Styling with CSS Shadow Parts​

Interfaces​

RangeChangeEventDetail​

RangeKnobMoveStartEventDetail​

RangeKnobMoveEndEventDetail​

RangeCustomEvent​

Types​

RangeValue​

Properties​

activeBarStart​

color​

debounce​

disabled​

dualKnobs​

max​

min​

mode​

name​

pin​

pinFormatter​

snaps​

step​

ticks​

value​

Events​

Methods​

CSS Shadow Parts​

CSS Custom Properties​

Slots​

Contents