A button that stays pressed: a filter, a mark, a flag.
Playground
Installation
Default
pressed + onPressedChange, or defaultPressed.
Sizes
As Button: xs 24 · sm 32 · default 36 · lg 40, and icon-*.
Toolbar
Icon only, each with an aria-label; at rest it takes the toolbar's text color.
In a header
A filter beside the search.