Search the component library



A simple component for presenting multiple options in a condensed space.

Usage Guidelines

Use this component when the options listed represent actions or navigation destinations. Prefer the standard select inputs for all other use cases.


  • Can be triggered by a link or button
  • Standard icon layout
  • Accessible

Opening a dropdown presents a simple list of textual options. These may be divided into logically related groups, and a single option may be indicated as selected with a checkmark.


Logically related options may be grouped together for easy scanning.

Selected option

When a dropdown contains actions that edit some piece of data, you may use a checkmark to indicate the current state of the value being edited.

Scrolling menu

In most cases you should avoid putting an excessive number of items in the dropdown menu. Occasionally the use case will require it (for example, a list of times in a time picker). If necessary, the length of the menu may be capped and a scroll bar will then allow access to all items.

The various options for the dropdown menu. Options may be grouped, and checkmarks may be used when editing data.

If the menu contains a significant number of items it may cap the height and use a scroll bar.

Dropdowns should generally be indicated by UI Text or a button paired with an icon. Just the icon may be used if situated within an appropriate context like a course card or over a color picker.

If the trigger item is too far to the right the dropdown will shift to be right aligned.

The various trigger types available.

Menus are left aligned with the trigger unless there isn’t enough space.

Responsive behavior

At the extra small breakpoint, the dropdown switches from a menu that drops down to a modal that slides up with a list of options. For UI Text and button triggers the dropdown icon also becomes optional.

The dropdown page should have a descriptive title explaining the context for the options presented, although it is optional.

An example of a dropdown menu at the extra small breakpoint.

A mobile dropdown with a selection indicator.


  • Standard width is 220px
  • 16px top and bottom padding
  • 24px left and right padding
  • 8px between items
  • A focused or hovered item has a Moonlight background that extends 4px above and below the text
  • Triggers use the default focus behavior for buttons or links
  • Groups may be divided by a 1px solid Alto line
  • The divider line should have 12px between it and any text above/below it
  • Uses the check-sm-18 icon
  • 16px left padding around the icon
  • 8px right padding
  • Text content is shifted right to make room for the icon (34px left padding)
  • This expanded spacing should be used any time it is possible for an option to be checked, i.e. don’t start with the narrower space and then shift text over to make room for a check mark
  • Left aligned by default
  • Right aligned if there is not room within the viewport for the dropdown
  • Use the native scrollbar
  • Height may be capped at different sizes depending on the content, prefer a height of 300px though

Responsive redlines

  • Use this style for the extra small breakpoint
  • Full viewport width and height (covering the header)
  • List items have 24px padding on all sides
  • The title has 24px vertical padding
  • Close icon has a minimum of 12px left padding and 24px of right padding
Check mark
  • The checkmark has 24px of left padding and 8px on the right
  • This pushes the options and any divider lines to the right, for a total right padding of 42px
  • The whole mobile menu should slide up from the bottom of the screen
  • Use a duration of 0.3s
  • Easing is cubic-bezier(0.77, 0, 0.175, 1)
  • Same transition for entry and exit



  • ADDED: Feature to allow the menu to scroll for situations with many options
  • ADDED: Feature links


Initial Version