OverflowSet: OverflowSet

OverflowSetR Documentation



The OverflowSet is a flexible container component that is useful for displaying a primary set of content with additional content in an overflow callout. Note that the example below is only an example of how to render the component, not a specific use case.


By default, the OverflowSet is simply role=group. If you used as a menu, you will need to add role="menubar" and add proper aria roles to each rendered item (menuitem, menuitemcheckbox, menuitemradio)

For more details and examples visit the official docs. The R package can not handle each and every case, so for advanced use cases you need to work using the original docs to achieve the desired result.





Props to pass to shiny.react::reactElement. See allowed props listed below in Details section


  • key string
    Unique id to identify the item.

  • keytipProps IKeytipProps
    Optional keytip for the overflowSetItem.

  • className string
    Class name

  • componentRef IRefObject<IOverflowSet>
    Gets the component ref.

  • doNotContainWithinFocusZone boolean
    If true do not contain the OverflowSet inside of a FocusZone, otherwise the OverflowSet will contain a FocusZone. If this is set to true focusZoneProps will be ignored. Use one or the other.

  • focusZoneProps IFocusZoneProps
    Custom properties for OverflowSet's FocusZone. If doNotContainWithinFocusZone is set to true focusZoneProps will be ignored. Use one or the other.

  • items IOverflowSetItemProps[]
    An array of items to be rendered by your onRenderItem function in the primary content area

  • itemSubMenuProvider (item: IOverflowSetItemProps) => any[] | undefined
    Function that will take in an IOverflowSetItemProps and return the subMenu for that item. If not provided, will use 'item.subMenuProps.items' by default. This is only used if your overflow set has keytips.

  • keytipSequences string[]
    Optional full keytip sequence for the overflow button, if it will have a keytip.

  • onRenderItem (item: IOverflowSetItemProps) => any
    Method to call when trying to render an item.

  • onRenderOverflowButton IRenderFunction<any[]>
    Rendering method for overflow button and contextual menu. The argument to the function is the overflowItems passed in as props to this function.

  • overflowItems IOverflowSetItemProps[]
    An array of items to be passed to overflow contextual menu

  • overflowSide 'start' | 'end'
    Controls wether or not the overflow button is placed at the start or end of the items. This gives a reveresed visual behavior but maintains correct keyboard navigation.

  • role string
    The role for the OverflowSet.

  • styles IStyleFunctionOrObject<IOverflowSetProps, IOverflowSetStyles>
    Call to provide customized styling that will layer on top of the variant rules.

  • vertical boolean
    Change item layout direction to vertical/stacked. If role is set to menubar, vertical={true} will also add proper aria-orientation.



if (interactive()) {
  items <- list(
    list(key = "item1", icon = "Add", name = "Link 1"),
    list(key = "item2", icon = "Upload", name = "Link 2"),
    list(key = "item3", icon = "Share", name = "Link 3")
  overflowItems <- list(
    list(key = "item4", icon = "Mail", name = "Overflow Link 1"),
    list(key = "item5", icon = "Calendar", name = "Overflow Link 2")
  onRenderItem <- JS("item =>
    jsmodule['react'].createElement(jsmodule['@fluentui/react'].CommandBarButton, {
      role: 'menuitem',
      iconProps: { iconName: item.icon },
      styles: {
        root: { padding: '10px' }
  onRenderOverflowButton <- JS("overflowItems =>
    jsmodule['react'].createElement(jsmodule['@fluentui/react'].CommandBarButton, {
      role: 'menuitem',
      title: 'More items',
      styles: {
        root: { padding: '10px' }
      menuIconProps: { iconName: 'More' },
      menuProps: { items: overflowItems }

    ui = OverflowSet(
      vertical = TRUE,
      items = items,
      overflowItems = overflowItems,
      onRenderItem = onRenderItem,
      onRenderOverflowButton = onRenderOverflowButton
    server = function(input, output) {}

Appsilon/shiny.fluent documentation built on June 12, 2022, 2:41 a.m.