I used to think that the implementation of cascading navigation should be very simple, just use the hover attribute of CSS to implement it, so I didn’t pay too much attention to practice. But in a recent interview, when I was asked this question, I realized that there are many things that cannot be taken for granted. It is not only OK to know the general idea, but also requires actual hands-on ability.
Later, I actually implemented the cascading menu and took this opportunity to make it into a template to learn with everyone.
The following is the HTML part:
<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>纯css级联导航</title></head><body> <div class="main"> <ul class="one-nav"> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> </ul> </li> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> </ul> </li> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li> <a href="javascript:;">二级导航></a> <ul class="three-nav"> <li><a href="javascipt:;">三级导航</a></li> <li><a href="javascipt:;">三级导航</a></li> <li><a href="javascipt:;">三级导航</a></li> </ul> </li> <li><a href="javascript:;">二级导航</a></li> </ul> </li> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> </ul> </li> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> </ul> </li> <li> <a href="javascript:;">一级导航</a> <ul class="two-nav"> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li><a href="javascript:;">二级导航</a></li> <li> <a href="javascript:;"><二级导航</a> <ul class="three-nav"> <li><a href="javascipt:;">三级导航</a></li> <li><a href="javascipt:;">三级导航</a></li> <li><a href="javascipt:;">三级导航</a></li> </ul> </li> </ul> </li> </ul> </div></body></html>
CSS part:
body,div,ul,li,a{margin: 0;padding: 0;text-decoration: none;} /* 一级导航 */ .one-nav li{list-style-type: none;float: left;width: 16.57%;text-align: center;background-color: #3391E6;border-right: 1px solid white;cursor: pointer;height: 30px;line-height: 30px;} .one-nav li:nth-last-child(1){border-right: none;} .one-nav li a{color: white;} .one-nav li:hover .two-nav{display: block;} .one-nav li:hover{background-color: #4260D7;} /* 二级导航 */ .two-nav {display: none;} .two-nav li{width: 100%;} .two-nav li:hover .three-nav{display: block;position: relative;} /* 三级导航 */ .three-nav{position: absolute;width:100%;left: 100%;bottom: 100%;} /* 最右边的三级导航显示在左边 */ .one-nav li:nth-last-child(1) .two-nav li .three-nav li{width: 100%;position:relative;right: 200%;}The rendering is as follows:
The example is relatively simple, but often the simpler things require more down-to-earth practice and experience, life is like this ,mutual encouragement.
Author: Zhizhi
Sign: The road is long and long, I will search up and down.
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