1.hover

移入其父元素.navI时，触发鼠标的hover态，给父元素添加样式为position:relative;z-index:1;。从而提升了层级z-index。在其子元素导航内容的层级比拼中，“子凭父贵”，父元素层级高的，其导航内容在重叠状态中显示在最上面

<style>body,p{margin: 0;}h2{margin: 0;font-size:100%;}ul{margin: 0;padding: 0;list-style: none;}   a{text-decoration: none;color:inherit;}.box{width: 572px;border: 1px solid #999;overflow: hidden;}.nav{margin-left: -1px;font: 14px "微软雅黑";overflow: hidden;background-color: #f1f1f1;}.navI{float: left;width: 33.333%;box-sizing: border-box;}.navI-tit{line-height: 40px;text-align: center;cursor: pointer;border-left: 1px solid #cecece;border-bottom: 1px solid #cecece;}.navI-txt{width: 572px;height:200px;text-indent:2em;line-height: 2;background:#fff;}.ml1{margin-left: -100%;}.ml2{margin-left: -200%;}.navI_active{position:relative;z-index:1;}/*重点代码*/.navI:hover{position:relative;z-index:1;}.navI:hover .navI-tit{background:#fff;border-bottom:none;}</style><div class="box">    <ul class="nav">        <li class="navI navI_active">            <h2 class="navI-tit">课程</h2>            <p class="navI-txt">课程内容</p>        </li>        <li class="navI">            <h2 class="navI-tit">学习计划</h2>            <p class="navI-txt ml1">学习计划内容</p>        </li>        <li class="navI">            <h2 class="navI-tit">技能图谱</h2>            <p class="navI-txt ml2">技能图谱内容</p>        </li>    </ul>   </div>

2.锚点

点击导航标题时，触发target伪类，改变对应的导航内容的层级z-index，从而使当前导航内容在三个导航内容中胜出，在最上层显示；与此同时，改变当前导航标题的样式

<style>body,p{margin: 0;}h2{margin: 0;font-size:100%;}ul{margin: 0;padding: 0;list-style: none;}   a{text-decoration: none;color:inherit;}.box{width: 572px;border: 1px solid #999;overflow: hidden;}.nav{margin-left: -1px;font: 14px "微软雅黑";overflow: hidden;background-color: #f1f1f1;}.navI{float: left;width: 33.333%;box-sizing: border-box;position:relative;}.navI-tit{position:absolute;top:0;left:0;right:0;box-sizing: border-box;line-height: 40px;height: 40px;text-align: center;cursor: pointer;border-left: 1px solid #cecece;border-bottom: 1px solid #cecece;}.navI-txt{width: 572px;height:200px;margin-top: 40px;text-indent:2em;line-height: 2;background:#fff;}.ml1{margin-left: -100%;}.ml2{margin-left: -200%;}.navI_active{z-index:1;}/*重点代码*/.navI-txt:target{position:relative;z-index:1;}.navI-txt:target ~ .navI-tit{background:#fff;border-bottom:none;}</style><div class="box">    <ul class="nav">        <li class="navI navI_active">            <p class="navI-txt" id="kc">课程内容</p>            <a class="navI-tit" href="#kc">课程</a>        </li>        <li class="navI">            <p class="navI-txt ml1" id="xx">学习计划内容</p>            <a class="navI-tit" href="#xx">学习计划</a>        </li>        <li class="navI">            <p class="navI-txt ml2" id="jn">技能图谱内容</p>            <a class="navI-tit" href="#jn">技能图谱</a>        </li>    </ul>   </div>

3.radio

点击导航标题时，触发checked伪类，改变对应的导航内容的层级z-index，从而使当前导航内容在三个导航内容中胜出，在最上层显示；与此同时，改变当前导航标题的样式

<style>body,p{margin: 0;}ul{margin: 0;padding: 0;list-style: none;}a{text-decoration: none;color: inherit;}input{margin: 0;padding: 0;border:none;}.box{width:572px;border:1px solid #999;font:14px "微软雅黑";overflow:hidden;}.nav-tit{margin-left: -1px;height: 40px;line-height: 40px;text-align: center;background-color: #f1f1f1;overflow: hidden;}.nav-titI{box-sizing: border-box;float: left;width: 33.333%;border-left: 1px solid #cecece;border-bottom: 1px solid #cecece;cursor: pointer;}.nav-txt{height: 200px;}.nav-txtI{height: 200px;display:block;width: 100%;text-indent: 2em; line-height: 2;}/*重点内容*/.nav-txt{overflow: hidden;}.nav-titI:hover{background-color: #fff;border-bottom:none;}</style><div class="box">    <nav class="nav-tit">        <label class="nav-titI" for="kc">课程</label>        <label class="nav-titI" for="xx">学习计划</label>        <label class="nav-titI" for="jn">技能图谱</label>    </nav>    <nav class="nav-txt">        <input class="nav-txtI nav-txtI_active" id="kc" value="课程内容" readonly>        <input class="nav-txtI" id="xx" value="学习计划内容" readonly>        <input class="nav-txtI" id="jn" value="技能图谱内容" readonly>    </nav></div>

以上所述是小编给大家介绍的CSS实现Tab页切换实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！