04 class和style绑定
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>04_class与style绑定</title> <style> .classA { color: red; } .classB { background: blue; } .classC { font-size: 20px; } </style> </head> <body> <!-- 1. 理解 在应用界面中, 某个(些)元素的样式是变化的 class/style绑定就是专门用来实现动态样式效果的技术 2. class绑定: :class='xxx' xxx是字符串 xxx是对象 xxx是数组 3. style绑定 :style="{ color: activeColor, fontSize: fontSize + 'px' }" 其中activeColor/fontSize是data属性 --> <div id="demo"> <h2>1. class绑定: :class='xxx'</h2> <p :class="myClass">xxx是字符串</p> <p :class="{classA: hasClassA, classB: hasClassB}">xxx是对象</p> <p :class="['classA', 'classB']">xxx是数组</p> <h2>2. style绑定</h2> <p :style="{color:activeColor, fontSize}">:style="{ color: activeColor, fontSize: fontSize + 'px' }"</p> <button @click="update">更新</button> </div> <script type="text/javascript" src="../js/vue.js"></script> <script type="text/javascript"> new Vue({ el: '#demo', data: { myClass: 'classA', hasClassA: true, hasClassB: false, activeColor: 'red', fontSize: '20px' }, methods: { update () { this.myClass = 'classB' this.hasClassA = !this.hasClassA this.hasClassB = !this.hasClassB this.activeColor = 'yellow' this.fontSize = '30px' } } }) </script> </body> </html>