demo.html
1 <!DOCTYPE html> 2 <html lang="en" xmlns:v-bind="http://www.w3.org/1999/xhtml" xmlns:v-html="http://www.w3.org/1999/xhtml" 3 xmlns:v-on="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta charset="UTF-8"> 6 <title>Vue Demo</title> 7 <!--自选版本--> 8 <!--<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.js"></script>--> 9 <!-- 开发环境版本，包含了有帮助的命令行警告 -->10 <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>11 <!-- 生产环境版本，优化了尺寸和速度 -->12 <!--<script src="https://cdn.jsdelivr.net/npm/vue"></script>-->13 <link href="style.css" rel="stylesheet">14 </head>15 <body>16 <div id="app">17 <div>18 <h2>动态绑定CSS样式</h2>19 <div>20 <h4>示例一</h4>21 <div v-on:click="varChangeColor = !varChangeColor" v-bind:class="{changeColor:varChangeColor}">22 <span>点击切换颜色</span>23 </div>24 25 <hr>26 <h4>示例二</h4>27 <button v-on:click="varChangeColor = !varChangeColor">改变颜色</button>28 <button v-on:click="varChangeLength = !varChangeLength">改变长度</button>29 <button v-on:click="varChangeLength = !varChangeLength,varChangeColor = !varChangeColor">两者都改变</button>30 <!--computed属性封装对象-->31 <div v-bind:class="computedClass">32 <span>测试内容</span>33 </div>34 </div>35 36 </div>37 38 39 </div>40 <script src="app.js"></script>41 42 43 </body>44 </html>
app.js
1 var app = new Vue({ 2 el: ‘#app‘, 3 data: { 4 varChangeColor: false, 5 varChangeLength: false, 6 }, 7 methods: {}, 8 9 computed: {10 computedClass: function () {11 return {12 changeColor: this.varChangeColor,13 changeLength: this.varChangeLength14 }15 },16 }17 })
style.css
1 span { 2 background: red; 3 display: inline-block; 4 padding: 10px; 5 color: #fff; 6 margin: 10px 0; 7 } 8 9 .changeColor span {10 background: green;11 }12 13 .changeLength span:after {14 content: "length";15 margin-left: 10px;16 }
截图：
