> ####添加或者移除边框 ``` <span class="border"></span> <span class="border border-0"></span> <span class="border border-top-0"></span> <span class="border border-right-0"></span> <span class="border border-bottom-0"></span> <span class="border border-left-0"></span> ``` > ####边框颜色 ``` <span class="border border-primary"></span> <span class="border border-secondary"></span> <span class="border border-success"></span> <span class="border border-danger"></span> <span class="border border-warning"></span> <span class="border border-info"></span> <span class="border border-light"></span> <span class="border border-dark"></span> <span class="border border-white"></span> ``` > ####圆角相关 ``` <span class="rounded"></span> <span class="rounded-top"></span> <span class="rounded-right"></span> <span class="rounded-bottom"></span> <span class="rounded-left"></span> <span class="rounded-circle"></span> <span class="rounded-0"></span> ```