Bootstrap 4 badges are small count/status indicators. Bootstrap 3 used a separate label component; Bootstrap 4 standardizes this use case around badges.
<span class="badge badge-primary">Primary</span>
<span class="badge badge-success">Success</span>
<span class="badge badge-warning">Warning</span>
<span class="badge badge-danger">Danger</span>
<span class="badge badge-primary badge-pill">52</span>
<button class="btn btn-primary">
Notifications
<span class="badge badge-light">4</span>
</button>
Badge generator → · Legacy Bootstrap 3 label generator
<a href='#'>Inbox <span class='badge'>42</span></a><button type='button' class='btn btn-info btn-xs'>button class='btn btn-success btn-xs' <span class='badge'>62</span></button><span class='label label-default'>Default </span>
<span class='label label-primary'>Primary </span>
<span class='label label-success'>Success </span>
<span class='label label-info'>Info </span>
<span class='label label-warning'>Warning </span>
<span class='label label-danger'>Danger </span>
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