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.varChangeLength 14 } 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：
