CSS3面包屑导航
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原文:http://www.helloweba.com/view-blog-347.html
HTML
HTML结构非常简单,一个有序列表ol,外面又<nav>包裹。
面包屑导航条的结构,我们给ol加上class样式为:.cd-breadcrumb,那么当前位置的层级li加上class样式为:.current。
<nav>
<ol class="cd-breadcrumb">
<li><a href="#0">首页</a></li>
<li><a href="#0">开发</a></li>
<li><a href="#0">Web</a></li>
<li class="current"><em>技术热点</em></li>
</ol>
</nav>
多步骤指示的结构,我们给ol加上class样式为:.cd-multi-steps,已完成的步骤的li加上class样式:.visited,当前步骤li加上class样式:.current。
<nav>
<ol class="cd-multi-steps text-center">
<li class="visited"><a href="#0">购物车</a></li>
<li class="visited" ><a href="#0">结算付款</a></li>
<li class="current"><em>送货</em></li>
<li><em>验货收货</em></li>
</ol>
</nav>
CSS
首先,我们使用::after伪元素来创建分隔符元素,就是层级之间的分割。
.cd-breadcrumb li::after, .cd-multi-steps li::after {
display: inline-block;
content: ‘\00bb‘;
margin: 0 .6em;
color: #959fa5;
}
如果我们需要使用自定义的分隔符,可以自定义样式 .custom-separator,并将样式添加到<ol>元素上,例如:
<nav>
<ol class="cd-breadcrumb custom-separator">
<li><a href="#0">首页</a></li>
<li><a href="#0">开发</a></li>
<li><a href="#0">Web</a></li>
<li class="current"><em>技术热点</em></li>
</ol>
</nav>
完了分隔符的样式.custom-separator这样写:
.cd-breadcrumb.custom-separator li::after,
.cd-multi-steps.custom-separator li::after {
/* replace the default separator with a custom icon */
content: ‘‘;
height: 16px;
width: 16px;
background: url(../img/cd-custom-separator.svg) no-repeat center center;
vertical-align: middle;
}
如果你像给面包屑导航和分步骤指示加上小图标,可以这些写样式,本例中我们使用svg文件来作图标处理。
.cd-breadcrumb.custom-icons li > *::before,
.cd-multi-steps.custom-icons li > *::before {
/* add a custom icon before each item */
content: ‘‘;
display: inline-block;
height: 20px;
width: 20px;
margin-right: .4em;
margin-top: -2px;
background: url(../img/cd-custom-icons-01.svg) no-repeat 0 0;
vertical-align: middle;
}
.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(2) > *::before,
.cd-multi-steps.custom-icons li:not(.current):nth-of-type(2) > *::before {
/* change custom icon using image sprites */
background-position: -20px 0;
}
.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(3) > *::before,
.cd-multi-steps.custom-icons li:not(.current):nth-of-type(3) > *::before {
background-position: -40px 0;
}
.cd-breadcrumb.custom-icons li:not(.current):nth-of-type(4) > *::before,
.cd-multi-steps.custom-icons li:not(.current):nth-of-type(4) > *::before {
background-position: -60px 0;
}
.cd-breadcrumb.custom-icons li.current:first-of-type > *::before,
.cd-multi-steps.custom-icons li.current:first-of-type > *::before {
/* change custom icon for the current item */
background-position: 0 -20px;
}
.cd-breadcrumb.custom-icons li.current:nth-of-type(2) > *::before,
.cd-multi-steps.custom-icons li.current:nth-of-type(2) > *::before {
background-position: -20px -20px;
}
.cd-breadcrumb.custom-icons li.current:nth-of-type(3) > *::before,
.cd-multi-steps.custom-icons li.current:nth-of-type(3) > *::before {
background-position: -40px -20px;
}
.cd-breadcrumb.custom-icons li.current:nth-of-type(4) > *::before,
.cd-multi-steps.custom-icons li.current:nth-of-type(4) > *::before {
background-position: -60px -20px;
}
当然,我们也可以将三角形箭头设置成分隔符,代码如下:
.cd-breadcrumb.triangle li::after,
.cd-breadcrumb.triangle li > *::after {
/*
li > *::after is the colored triangle after each item
li::after is the white separator between two items
*/
content: ‘‘;
position: absolute;
top: 0;
left: 100%;
content: ‘‘;
height: 0;
width: 0;
/* 48px is the height of the <a> element */
border: 24px solid transparent;
border-right-width: 0;
border-left-width: 20px;
}
.cd-breadcrumb.triangle li::after {
/* this is the white separator between two items */
z-index: 1;
-webkit-transform: translateX(4px);
-moz-transform: translateX(4px);
-ms-transform: translateX(4px);
-o-transform: translateX(4px);
transform: translateX(4px);
border-left-color: #ffffff;
/* reset style */
margin: 0;
}
.cd-breadcrumb.triangle li > *::after {
/* this is the colored triangle after each element */
z-index: 2;
border-left-color: inherit;
}
.cd-breadcrumb.triangle li:last-of-type::after,
.cd-breadcrumb.triangle li:last-of-type > *::after {
/* hide the triangle after the last step */
display: none;
}
对于分步骤指示我们还可以添加class如:.text-center, .text-top和 .text-bottom来让文字的位置对齐,还可以添加class如count用来标记步骤数,如以下代码:
<nav>
<ol class="cd-multi-steps text-bottom count">
<li class="visited"><a href="#0">购物车</a></li>
<li class="visited" ><a href="#0">结算付款</a></li>
<li class="current"><em>送货</em></li>
<li><em>验货收货</em></li>
</ol>
</nav>
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