Popover
Add context near its source
A generic Popover keeps short supporting information in the top layer and dismisses after an outside interaction.
Selection menu
Expose persistent choices
Checkbox and radio items update their checked state and remain open so people can make several related choices.
Alignment
Stay inside the viewport
End alignment supports controls near the inline edge. Placement flips above when the lower viewport has insufficient space.
Aligned to the container edge
Keyboard contract
Make every action reachable
The lifecycle stays local to each Popover and exposes selection without prescribing application side effects.
Open
Click / Arrow Up / Arrow DownNavigate
Arrows / Home / End / typeaheadDismiss
Escape / Tab / outside actionUsage guidance
Keep menus compact and action-oriented.
Use a generic Popover for context and a Menu for commands. Move forms and multi-step decisions into a Dialog or page.
Next component: Tooltip