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CompositeItem

Renders a focusable item as part of a composite widget. The tabindex attribute is automatically managed by this component based on the virtualFocus option.

When this component receives DOM focus or is virtually focused (when the virtualFocus option is set to true), the element will automatically receive the data-active-item attribute. This can be used to style the focused item, no matter the focus approach employed.

Code examples

Optional Props


accessibleWhenDisabled

boolean | undefined

Indicates whether the element should be focusable even when it is disabled.

This is important when discoverability is a concern. For example:

A toolbar in an editor contains a set of special smart paste functions that are disabled when the clipboard is empty or when the function is not applicable to the current content of the clipboard. It could be helpful to keep the disabled buttons focusable if the ability to discover their functionality is primarily via their presence on the toolbar.

Live examples


autoFocus

boolean | undefined = false

Automatically focuses the element upon mounting, similar to the native autoFocus prop. This addresses an issue where the element with the native autoFocus attribute might receive focus before React effects are executed.

The autoFocus prop can also be used with Focusable elements within a Dialog component, establishing the initial focus as the dialog opens.

Note: For this prop to work, the focusable prop must be set to true, if it's not set by default.

Live examples


clickOnEnter

boolean | undefined = true

If set to true, pressing the enter key while this element is focused will trigger a click on the element, regardless of whether it's a native button or not. If this prop is set to false, pressing enter will not initiate a click.


clickOnSpace

boolean | undefined = true

If set to true, pressing and releasing the space key while this element is focused will trigger a click on the element, regardless of whether it's a native button or not. If this prop is set to false, space will not initiate a click.


disabled

boolean | undefined = false

Determines if the element is disabled. This sets the aria-disabled attribute accordingly, enabling support for all elements, including those that don't support the native disabled attribute.

This feature can be combined with the accessibleWhenDisabled prop to make disabled elements still accessible via keyboard.

Note: For this prop to work, the focusable prop must be set to true, if it's not set by default.

Live examples


focusable

boolean | undefined = true

Determines if Focusable features should be active on non-native focusable elements.

Note: This prop only turns off the additional features provided by the Focusable component. Non-native focusable elements will lose their focusability entirely. However, native focusable elements will retain their inherent focusability, but without added features such as improved autoFocus, accessibleWhenDisabled, onFocusVisible, etc.


getItem

((props: CollectionStoreItem) => CollectionStoreItem) | undefined

A memoized function that returns props to be passed with the item during its registration in the store.

Code examples

const getItem = useCallback((data) => ({ ...data, custom: true }), []);
<CollectionItem getItem={getItem} />

id

string | undefined

The unique ID of the item. This will be used to register the item in the store and for the element's id attribute. If not provided, a unique ID will be automatically generated.

Live examples


moveOnKeyPress

BooleanOrCallback<React.KeyboardEvent<HTMLElement>> | undefined = true

Determines if pressing arrow keys while this item is in focus should move focus to a different item.

Note: To entirely disable focus moving within a composite widget, you can use the focusOnMove prop on the composite component instead. If you want to control the behavior only when arrow keys are pressed, where focusOnMove may not be applicable, this prop must be set on all composite items because they each manage their own key presses, as well as on the composite component itself.

Code examples


onFocusVisible

BivariantCallback<(event: React.SyntheticEvent<HTMLElement, Event>) => void> | undefined

Custom event handler invoked when the element gains focus through keyboard interaction or a key press occurs while the element is in focus. This is the programmatic equivalent of the data-focus-visible attribute.

Note: For this prop to work, the focusable prop must be set to true, if it's not set by default.

Live examples


render

RenderProp<React.HTMLAttributes<any> & { ref?: React.Ref<any> | undefined; }> | React.ReactElement<any, string | React.JSXElementConstructor<any>> | undefined

Allows the component to be rendered as a different HTML element or React component. The value can be a React element or a function that takes in the original component props and gives back a React element with the props merged.

Check out the Composition guide for more details.


rowId

string | undefined

The id that will be used to group items in the same row. This is usually retrieved by the CompositeRow component through context so in most cases you don't need to set it manually.


shouldRegisterItem

boolean | undefined

Determines if the item should be registered as part of the collection. If this is set to false, the item won't be accessible via arrow keys.


store

CompositeStore<CompositeStoreItem> | undefined

Object returned by the useCompositeStore hook. If not provided, the closest Composite or CompositeProvider components' context will be used.


tabbable

boolean | undefined

When the tabbable prop is set to true, the roving tabindex method is partially disabled for this element. This means that the tabIndex prop won't be assigned -1 when the item is inactive. In addition to using arrow keys, users will be able to tab to this element, leading to the composite widget no longer existing as a single tab stop.

As per the ARIA spec:

Authors SHOULD ensure that a composite widget exists as a single navigation stop within the larger navigation system of the web page.

Additionally, as stated in RFC-2119:

SHOULD This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course.

Therefore, while this may be allowed, you should think carefully about the implications of using this prop.

Note: This prop has no effect when the virtualFocus option is enabled.

Live examples


preventScrollOnKeyDown

BooleanOrCallback<React.KeyboardEvent<HTMLElement>> | undefined = false

Deprecated: Use CSS scroll-margin instead.

Whether the scroll behavior should be prevented when pressing arrow keys on the first or the last items.

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