Bootstrap4 面包屑导航（Breadcrumb）
面包屑导航是一种基于网站层次信息的显示方式。以博客为例，面包屑导航可以显示发布日期、类别或标签。它们表示当前页面在导航层次结构内的位置，是在用户界面中的一种导航辅助。
Bootstrap 中的面包屑导航是一个简单的带有 .breadcrumb class 的无序列表。分隔符会通过 CSS（bootstrap.min.css）中的 ::before 和 content 来添加，下面所示的 class 自动被添加：
.breadcrumb-item + .breadcrumb-item::before {
display: inline-block;
padding-right: 0.5rem;
color: #6c757d;
content: "/";
}
Bootstrap4 面包屑导航实例
<
ol
class
=
"
breadcrumb
"
>
<
li
class
=
"
breadcrumb-item active
"
>
Home
</
li
>
</
ol
>
<
ol
class
=
"
breadcrumb
"
>
<
li
class
=
"
breadcrumb-item
"
>
<
a
href
=
"
#
"
>
Home
</
a
>
</
li
>
<
li
class
=
"
breadcrumb-item active
"
>
Library
</
li
>
</
ol
>
<
ol
class
=
"
breadcrumb
"
>
<
li
class
=
"
breadcrumb-item
"
>
<
a
href
=
"
#
"
>
Home
</
a
>
</
li
>
<
li
class
=
"
breadcrumb-item
"
>
<
a
href
=
"
#
"
>
Library
</
a
>
</
li
>
<
li
class
=
"
breadcrumb-item active
"
>
Data
</
li
>
</
ol
>
尝试一下 »
我们也可以不用列表形式：
Bootstrap4 面包屑导航实例
<
nav
class
=
"
breadcrumb
"
>
<
a
class
=
"
breadcrumb-item
"
href
=
"
#
"
>
Home
</
a
>
<
a
class
=
"
breadcrumb-item
"
href
=
"
#
"
>
Library
</
a
>
<
a
class
=
"
breadcrumb-item
"
href
=
"
#
"
>
Data
</
a
>
<
span
class
=
"
breadcrumb-item active
"
>
Bootstrap
</
span
>
</
nav
>
尝试一下 »
