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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.
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.
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.
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. |
interface SegmentChangeEventDetail {
value?: string;
}
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;
}
| 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 ｜ undefined |
| Default | undefined |
| Description | If true, the user cannot interact with the segment. |
| Attribute | disabled |
| Type | boolean |
| Default | false |
| Description | The mode determines which platform styles to use. |
| Attribute | mode |
| Type | "ios" ｜ "md" |
| Default | undefined |
| 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 |
| 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 |
| Description | If true, users will be able to swipe between segment buttons to activate them. |
| Attribute | swipe-gesture |
| Type | boolean |
| Default | true |
| Description | the value of the segment. |
| Attribute | value |
| Type | number ｜ string ｜ undefined |
| Default | undefined |
| Name | Description | Bubbles |
|---|
ionChange | Emitted when the value property has changed and any dragging pointer has been released from ion-segment.
This event will not emit when programmatically setting the value property. | true |
No public methods available for this component.
No CSS shadow parts available for this component.
| Name | Description |
|---|
--background | Background of the segment button |
| Name | Description |
|---|
--background | Background of the segment button |
No slots available for this component.