tab切换原生js

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{margin:0; padding:0;}
        .out-box{overflow:hidden;}
        ul{overflow:hidden;}
        ul li{list-style: none; float:left; margin-right:10px;}
        .con{width:300px;height:150px; line-height:150px; display: none; background:red; position: absolute; top:30px; left:0;}
        .con1{background:red;}
        .con2{background:blue;}
        .con3{background:yellow;}

    </style>
</head>
<body>

<div class="out-box" id="box">
    <ul id="ul">
         <li><button>按钮1</button></li>
         <li><button>按钮2</button></li>
         <li><button>按钮3</button></li>
    </ul>
    <div class="con con1">1111111111</div>
    <div class="con con2">1111111111</div>
    <div class="con con3">1111111111</div>

</div>

<script>
    /*方法一*/
    var aUl=document.getElementById("ul");
    var aLi=aUl.getElementsByTagName("li");
    var aDiv=document.getElementsByClassName("con");
    console.log(aDiv);
    for(var i=0; i<aLi.length; i++){
        aLi[i].index=i;   //把i值存起来
        aLi[i].onclick= function () {
            for(var j=0; j<aDiv.length; j++){
                aDiv[j].style.display="none";  //清除div样式
            }
            aDiv[this.index].style.display="block";  //给当前的div盒子赋样式

        }
    }

    /*方法二*/
    var aUl=document.getElementById("ul");
    var aLi=aUl.getElementsByTagName("li");
    var aDiv=document.getElementsByClassName("con");
    for(var i=0; i<aLi.length; i++){
        (function(i){         //自执行函数会直接把i值保存起来           
            aLi[i].onclick= function () {
                for(var j=0; j<aDiv.length; j++){
                    aDiv[j].style.display="none"; //清除div样式

                }
                aDiv[i].style.display="block"; //给当前的div盒子赋样式


            }
        })(i);

    }

</script>

</body>
</html>

tab切换 原生js

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