UI Component Lab 日本語

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Data display

Badge

A small marker on another element, such as an unread count on a notification button.

Demo

How to recognize it

A small round or pill-shaped label, usually red, in the top-right corner of an icon or button, holding a number or just a dot.

Variations

Dot
A small dot with no number, showing only that there is something new.

Behavior

  • Updates when the count changes and disappears at zero; in this demo, opening the notifications clears it.
  • Large numbers are shortened, such as “99+”.
  • The badge itself is hidden from screen readers; the count is put into the name of the button it belongs to, such as “Notifications, 3 unread”.

Keyboard

KeyAction
—None for the badge. The button it sits on uses Enter / Space.
  • Tag: A badge is attached to another element to show a count or status; a tag stands on its own as a label for content.

Sources