The visual element represented by the accessibility node is currently expanded, such as an expanded dropdown list or menu.
If this role is set on a node with the role AccessibilityRole.Dropdown, the screen reader
announces the node as "expanded". Otherwise, it announces the node as "collapsed".
Notes
- This state is only supported for nodes with the role AccessibilityRole.Dropdown.
- On macOS, if the role AccessibilityRole.Dropdown is unset from a node, the screen reader
continues to announce the expanded/collapsed state of the node if its new role is compatible with this
state. This is a platform limitation.
Platform support: This state has no effect on mobile platforms.