TieredMenu displays submenus in nested overlays.
import { TieredMenu } from 'primereact/tieredmenu';
TieredMenu requires a collection of menuitems as its model.
<TieredMenu model={items} breakpoint="767px" />
Popup mode is enabled by adding popup property and calling toggle method with an event of the target.
<TieredMenu model={items} popup ref={menu} breakpoint="767px" />
<Button label="Show" onClick={(e) => menu.current.toggle(e)} />
TieredMenu offers item customization with the items template property that receives the item instance and returns an element.
<TieredMenu model={items} breakpoint="767px" />
The command property defines the callback to run when an item is activated by click or a key event.
<Toast ref={toast} />
<TieredMenu model={items} breakpoint="767px" />
Items with navigation are defined with command and url property to be able to use a router link component, an external link or programmatic navigation.
<TieredMenu model={items} breakpoint="767px" />
TieredMenu component uses the menubar role with aria-orientation set to "vertical" and the value to describe the menu can either be provided with aria-labelledby or aria-label props. Each list item has a presentation role whereas anchor elements have a menuitem role with aria-label referring to the label of the item and aria-disabled defined if the item is disabled. A submenu within a TieredMenu uses the menu role with an aria-labelledby defined as the id of the submenu root menuitem label. In addition, menuitems that open a submenu have aria-haspopup, aria-expanded and aria-controls to define the relation between the item and the submenu.
In popup mode, the component implicitly manages the aria-expanded, aria-haspopup and aria-controls attributes of the target element to define the relation between the target and the popup.
| Key | Function |
|---|---|
| tab | Add focus to the first item if focus moves in to the menu. If the focus is already within the menu, focus moves to the next focusable item in the page tab sequence. |
| shift + tab | Add focus to the last item if focus moves in to the menu. If the focus is already within the menu, focus moves to the previous focusable item in the page tab sequence. |
| enter | If menuitem has a submenu, toggles the visibility of the submenu otherwise activates the menuitem and closes all open overlays. |
| space | If menuitem has a submenu, toggles the visibility of the submenu otherwise activates the menuitem and closes all open overlays. |
| escape | If focus is inside a popup submenu, closes the submenu and moves focus to the root item of the closed submenu. |
| down arrow | Moves focus to the next menuitem within the submenu. |
| up arrow | Moves focus to the previous menuitem within the submenu. |
| right arrow | Opens a submenu if there is one available and moves focus to the first item. |
| left arrow | Closes a submenu and moves focus to the root item of the closed submenu. |
| home | Moves focus to the first menuitem within the submenu. |
| end | Moves focus to the last menuitem within the submenu. |
| any printable character | Moves focus to the menuitem whose label starts with the characters being typed. |