<!DOCTYPE html>
<!--[if lt IE 7]>      <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]>         <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]>         <html class="no-js lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title></title>
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="stylesheet" href="">
        <style>   
            li{ list-style-type: none; display: inline-block; margin-right: 0.5rem;    }    
           .normal{ color: green;    }    
           .active{  color: red;    }
           .always{display: none;}
           .change{display: block;}
           </style>
       
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    </head>
    
    <body>
        <!--[if lt IE 7]>
            <p class="browsehappy">You are using an <strong>outdated</strong> browser. Please <a href="#">upgrade your browser</a> to improve your experience.</p>
        <![endif]-->
        
            <div class="myTab">
                <ul >
                    <li class="normal" v-for="(item,index) in items" :key="item.id" :class="{'active':isActive==index}" @click="change(index)">
                        {{item}}
                    </li>
                </ul>
                <ol >
                    <li  v-for="(item,index) in content" :key="item.id" class="always" :class="{'change':isActive==index}">{{item}}</li>
                </ol>
            </div>
        </body>
        
        <script>
            new Vue({
                el: ".myTab",
                data: {
                    items: [
                        '选项卡一',
                        '选项卡二',
                        '选项卡三'
                    ],
                    content:[
                        "内容一",
                        "内容二",
                        "内容三"
                    ],
                    isActive: 0 //索引值默认为0，即item1为默认激活的选项卡
                },
                methods: {
                    change: function (index) {
                        this.isActive = index;
                    }
                }
            })
        </script>
        
</html>

 

 

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