Dropdowns provide a compact way to present multiple options or actions to users, revealing choices upon interaction.

Components:

• Trigger element (e.g., button or text field)

• Dropdown menu containing selectable options

• Optional search functionality for filtering options

• Support for icons, avatars, and additional information in menu items

Features:

• Single and multi-select capabilities

• Customizable menu item styles (e.g., checkboxes, radio buttons)

• Keyboard navigation support

• Option to group related items

• Ability to include action items (e.g., "Upgrade Now")

Design considerations:

1. Clear visual feedback for hover and selected states

2. Consistent styling and spacing of menu items

3. Appropriate use of icons or avatars to enhance recognition

4. Consider the placement of the dropdown to avoid obscuring important content

5. Ensure sufficient contrast between the dropdown and the background

Implementation notes:

1. Implement keyboard accessibility (arrow keys, Enter, Esc)

2. Provide a clear visual indicator for the dropdown's open state

3. Consider adding a subtle animation for opening/closing the dropdown

4. Ensure the dropdown closes when clicking outside or selecting an option (unless multi-select)

5. For long lists, implement scrolling within the dropdown menu