selectionMode

The type of selection allowed in side navigation can be none, single or multiple.

• None: side navigation does not allow item selection by default.
• Single: users can select only one item at a time.
• Multiple: users can select more than one item at a time.

items

The list of navigation items displayed in a side navigation. Each item includes a label by default and can optionally include an icon. Items that contain nested navigation levels can also include a trailing accessory area, which supports a chevron and an optional counter.