<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>css样式控制</title>
    <style type="text/css">
        div>div{
            width: 60px;
            height: 60px;
            border: 2px solid #bbbbbb;
            text-align: center;
            line-height: 60px;
            font-size: 30px;
            margin: 10px;
            float: left;
        }
        .selected{
            border-color: #000000;
        }
        .active{
            background-color: #bbbbbb;
        }

    </style>
</head>
<body>
    <div id="app">
        <div>1</div>
        <div v-bind:style="{'border-color':selected}">2</div>
        <div v-bind:style="{'background':active}">3</div>
        <div v-bind:style="{'borderColor':selected,'background':active}">4</div>
    </div>

    <script src="../js/vue.js"></script>

    <script>
        let vm = new Vue({
            el:'#app',
            data:{
                selected:'#000',
                active:'#bbb'
            }
        });
    </script>
</body>
</html>