Structure of the breadcrumb and how its internal parts are composed. These are the breadcrumb's semantic parts, so they are also what the classNames and styles objects accept.
Name
Description
1
root
The <nav> around the trail, with the text color and size every crumb inherits.
2
item
One crumb, from an entry in items: its title, an optional icon, and a link when it has href or path. An entry with menu adds a dropdown arrow.
3
separator
The mark between two crumbs, never after the last one. separator replaces it for the whole trail, and "" removes it.