使用边框实用工具快速设置元素的边框和边框半径样式。非常适合用于图像、按钮或任何其他元素。

边框

使用边框实用工具添加或移除元素的边框。可以选择所有边框或一次选择一个边框。

加法

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

减法

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

边框颜色

使用基于我们主题颜色的实用工具更改边框颜色。

<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>

边框半径

向元素添加类以轻松地对其圆角。

Example rounded image - Bootstrap 框架75x75 Example top rounded image - Bootstrap 框架75x75 Example right rounded image - Bootstrap 框架75x75 Example bottom rounded image - Bootstrap 框架75x75 Example left rounded image - Bootstrap 框架75x75 Completely round image - Bootstrap 框架75x75 Rounded pill image - Bootstrap 框架150x75 Example non-rounded image (overrides rounding applied elsewhere) - Bootstrap 框架75x75
<img src="..." class="rounded" alt="...">
<img src="..." class="rounded-top" alt="...">
<img src="..." class="rounded-right" alt="...">
<img src="..." class="rounded-bottom" alt="...">
<img src="..." class="rounded-left" alt="...">
<img src="..." class="rounded-circle" alt="...">
<img src="..." class="rounded-pill" alt="...">
<img src="..." class="rounded-0" alt="...">

尺寸

使用 .rounded-lg.rounded-sm 获得更大或更小的边框半径。

Example small rounded image - Bootstrap 框架75x75 Example large rounded image - Bootstrap 框架75x75
<img src="..." class="rounded-sm" alt="...">
<img src="..." class="rounded-lg" alt="...">