ion-segment

shadow

Segments display a group of related buttons, sometimes known as segmented controls, in a horizontal row. They can be displayed inside of a toolbar or the main content.

Their functionality is similar to tabs, where selecting one will deselect all others. Segments are useful for toggling between different views inside of the content. Tabs should be used instead of a segment when clicking on a control should navigate between pages.

Basic Usage

Segments consist of segment buttons with a value property on each button. Set the value property on the segment to match the value of a button to select that button. Segments can also be disabled to prevent users from interacting with them.

Scrollable Segments

Segments are not scrollable by default. Each segment button has a fixed width, and the width is determined by dividing the number of segment buttons by the screen width. This ensures that each segment button can be displayed on the screen without having to scroll. As a result, some segment buttons with longer labels may get cut off. To avoid this we recommend either using a shorter label or switching to a scrollable segment by setting the scrollable property to true. This will cause the segment to scroll horizontally, but will allow each segment button to have a variable width.

Segments in Toolbars

Theming

Colors

CSS Custom Properties

Accessibility

Keyboard Navigation

The component has full keyboard support for navigating between and selecting ion-segment-button elements. By default, keyboard navigation will only focus ion-segment-button elements, but you can use the selectOnFocus property to ensure that they get selected on focus as well. The following table details what each key does:

Key	Function
ArrowRight	Focuses the next focusable element.
ArrowLeft	Focuses the previous focusable element.
Home	Focuses the first focusable element.
End	Focuses the last focusable element.
Space or Enter	Selects the element that is currently focused.

Interfaces

SegmentChangeEventDetail

interface SegmentChangeEventDetail {
  value?: string;
}

SegmentCustomEvent

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 SegmentCustomEvent extends CustomEvent {
  target: HTMLIonSegmentElement;
  detail: SegmentChangeEventDetail;
}

Properties

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

disabled

Description	trueの場合、ユーザーはセグメントと対話することができません。
Attribute	disabled
Type	boolean
Default	false

mode

Description	modeは、どのプラットフォームのスタイルを使用するかを決定します。
Attribute	mode
Type	"ios" ｜ "md"
Default	undefined

scrollable

Description	If true, the segment buttons will overflow and the user can swipe to see them. In addition, this will disable the gesture to drag the indicator between the buttons in order to swipe to see hidden buttons.
Attribute	scrollable
Type	boolean
Default	false

selectOnFocus

Description	If true, navigating to an ion-segment-button with the keyboard will focus and select the element. If false, keyboard navigation will only focus the ion-segment-button element.
Attribute	select-on-focus
Type	boolean
Default	false

swipeGesture

Description	trueの場合、ユーザーはセグメントボタンの間をスワイプしてアクティブにすることができます。
Attribute	swipe-gesture
Type	boolean
Default	true

value

Description	セグメントの価値
Attribute	value
Type	null ｜ string ｜ undefined
Default	undefined

Events

Name	Description
ionChange	Emitted when the value property has changed and any dragging pointer has been released from ion-segment.

Methods

No public methods available for this component.

CSS Shadow Parts

No CSS shadow parts available for this component.

CSS Custom Properties

Name	Description
--background	セグメントボタンの背景

Slots

No slots available for this component.