Borders

<div class="border"></div>
<div class="border-top"></div>
<div class="border-right"></div>
<div class="border-bottom"></div>
<div class="border-left"></div>

<div class="border-0"></div>
<div class="border-top-0"></div>
<div class="border-right-0"></div>
<div class="border-bottom-0"></div>
<div class="border-left-0"></div>

<div class="border border-primary"></div>
<div class="border border-secondary"></div>
<div class="border border-success"></div>
<div class="border border-warning"></div>
<div class="border border-danger"></div>
<div class="border border-info"></div>
<div class="border border-light"></div>
<div class="border border-dark"></div>
<div class="border border-white"></div>

<div class="rounded"></div>
<div class="rounded-top"></div>
<div class="rounded-right"></div>
<div class="rounded-bottom"></div>
<div class="rounded-left"></div>
<div class="rounded-circle"></div>
<div class="rounded-pill" style="width: 100px;"></div>
<div class="rounded-0"></div>

<div class="rounded-sm"></div>
<div class="rounded"></div> <!-- Regular border-radius -->
<div class="rounded-lg"></div>