JS+CSS+H5实现Tab栏切换与复用功能详解

一、效果展示

二、实现的大致原理

1. 首先利用CSS与HTML5构建基础的Tab栏视觉样式（参考相关代码）。

一、效果展示

2. 在确定样式后，为可点击的目标元素绑定监听事件。通过获取DOM节点并设置自定义属性index，用于定位点击后需高亮的节点。随后执行元素查找与样式重置：取消所有节点的激活状态，仅对当前点击的节点应用特定效果。节点获取路径主要依赖：点击元素→父元素→子元素→兄弟元素→兄弟元素的子元素（具体细节见代码注释）。

三、H5的布局

布局部分无特殊之处，采用常规写法即可，关键在于合理运用选择器进行结构定义。

    <div class="tab">
        <div class="nav">
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="hover">公司新闻</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >公司动态</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >行业新闻</a>
        </div>
        <div class="nav_con"> 
            <div>内容</div>
            <div>动态</div>
            <div>行业</div>
        </div>
    </div>
 
    <div class="tab">
        <div class="nav">
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="hover">大学</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >中学</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >小学</a>
        </div>
        <div class="nav_con">
            <div>大学内容</div>
            <div>中学内容</div>
            <div>小学内容</div>
        </div>
    </div>

四、CSS样式

为实现视频中的视觉效果，需配置基础样式。利用浮动使元素排列在同一行，注意浮动会脱离文档流。可为a标签设定宽高及外边距以优化视觉呈现。需特别注意内容区域的显隐控制，默认状态下仅显示第一个Tab对应的内容。

        a{
            text-decoration: none;
            width: 180px;
            height: 30px;
            line-height: 30px;
            text-align: center;
            color: #666;
            float: left;
            margin-right: 15px;
        }
        .nav a{
            background-color: beige;
        }
        .nav a.hover{
            background-color: blue;
        }
        .nav_con div:first-child~div{
            display: none;
        }
        .nav::after{
            content: '';
            display: block;
            clear: both;
        }
    .nav_con{
        margin-bottom: 50px;
    }

五、JS代码内容

执行流程按顺序如下：

获取相关DOM元素。

利用事件委托机制，在父级元素上添加监听器。

首先获取当前点击元素的父节点，再通过该父节点获取其所有子节点。

应用排他思想，重置其他节点的样式。

为每个子节点添加自定义属性index。

读取当前被点击的nav a元素上的index属性值。

获取当前元素的父级元素，进而获取其兄弟元素，并定位到对应的子元素。

控制当前nav_con显示对应内容。

为当前点击节点添加hover样式类。

 let navNodes = document.querySelectorAll('.nav');
         for(let i=0;i<navNodes.length;i++){
        //通过委派给父亲添加监听事件
    navNodes[i].addEventListener('click',function(e){
        //先获得当前的父节点，在通过父节点获得所有的子节点
 let navs = e.target.parentNode.children;
        //设置排他思想
    for(let j=0;j<navs.length;j++){
    navs[j].className='';
        //给每一个子节点加上一个自定义属性 index
    navs[j].setAttribute("index",j)
}
        //获取当前被点击的nav a上面的属性index
 let thisIndex = e.target.getAttribute("index");
        //获取当前元素的父级元素，在获得父级的兄弟，在找到子元素
 let nav_cons = e.target.parentNode.nextElementSibling.children;
        for(let j=0;j<nav_cons.length;j++){
        nav_cons[j].style.display = "none";
}
        //当前nav_con 显示内容
        nav_cons[thisIndex].style.display="block"
 
       //当前节点获得hover样式
        e.target.className = "hover"
})
}

六、完整代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        a{
            text-decoration: none;
            width: 180px;
            height: 30px;
            line-height: 30px;
            text-align: center;
            color: #666;
            float: left;
            margin-right: 15px;
        }
        .nav a{
            background-color: beige;
        }
        .nav a.hover{
            background-color: blue;
        }
 
        .nav_con div:first-child~div{
            display: none;
        }
        .nav::after{
            content: '';
            display: block;
            clear: both;
        }
    .nav_con{
        margin-bottom: 50px;
    }
    </style>
</head>
<body>
    <div class="tab">
        <div class="nav">
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="hover">公司新闻</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >公司动态</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >行业新闻</a>
        </div>
        <div class="nav_con"> 
            <div>内容</div>
            <div>动态</div>
            <div>行业</div>
        </div>
    </div>
 
    <div class="tab">
        <div class="nav">
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="hover">大学</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >中学</a>
            <a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >小学</a>
        </div>
        <div class="nav_con">
            <div>大学内容</div>
            <div>中学内容</div>
            <div>小学内容</div>
        </div>
    </div>
 
 
 
    <script>
        let navNodes = document.querySelectorAll('.nav');
         for(let i=0;i<navNodes.length;i++){
        //通过委派给父亲添加监听事件
            navNodes[i].addEventListener('click',function(e){
                //先获得当前的父节点，在通过父节点获得所有的子节点
                let navs = e.target.parentNode.children;
                for(let j=0;j<navs.length;j++){
                    navs[j].className='';
                    //给每一个子节点加上一个自定义属性 index
                    navs[j].setAttribute("index",j)
                }
                //获取当前被点击的nav a上面的属性index
                let thisIndex = e.target.getAttribute("index");
                //获取当前元素的父级元素，在获得父级的兄弟，在找到子元素
                let nav_cons = e.target.parentNode.nextElementSibling.children;
                for(let j=0;j<nav_cons.length;j++){
                    nav_cons[j].style.display = "none";
                }
                //当前nav_con 显示内容
                nav_cons[thisIndex].style.display="block"
 
                //当前节点获得hover样式
                e.target.className = "hover"
            })
         }
 
 
 
    </script>
</body>
</html>

总结

至此，关于如何通过JavaScript、CSS、H5实现简单的tab栏切换和复用功能的文章介绍完毕。更多相关JS、CSS、H5实现tab栏切换和复用内容，请搜索本站以前的文章或继续浏览下面的相关文章，希望大家以后多多支持本站！

基于HTML5、CSS与JavaScript的Tab栏切换实现及复用方案

一、效果展示

二、实现的大致原理

三、H5的布局

四、CSS样式

五、JS代码内容

六、完整代码

总结

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