<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>绑定class属性</title>
    <style type="text/css">
        .se_qukuai{
            width: 400px;
            height: 400px;
            background-color: lightblue;
        }
    </style>
</head>
<body>
    <div id="app">
        <button v-on:click="isActive = !isActive">激活与静默</button>
        <div v-bind:class="{'se_qukuai':isActive}"></div>
    </div>

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

    <script>
        let vm = new Vue({
            el:'#app',
            data:{
                isActive:true,
            }
        });
    </script>
</body>
</html>