绑定样式
About 3 min
1. 绑定class样式
:class="xxx" //xxx 可以是字符串、数组、对象
1.1 字符串写法
字符串写法适用于：类名不确定，要动态获取
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绑定class样式-字符串写法</title>
<style>
.basic {
width: 400px;
height: 100px;
border: 1px solid black;
}
.happy {
border: 4px solid red;
background-color: rgba(255, 255, 0, 0.644);
background: linear-gradient(30deg, yellow, pink, orange, yellow);
}
.sad {
border: 4px dashed rgb(2, 197, 2);
background-color: gray;
}
.normal {
background-color: skyblue;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<!-- 准备好一个容器 -->
<div id="root">
<!-- 绑定class样式--字符串写法，适用于：样式的类名不确定，需要动态指定 -->
<div class="basic" :class="mood" @click="changeMood">{{name}}</div>
</div>
<script>
Vue.config.productionTip = false
const vm = new Vue({
el: '#root',
data: {
name: 'zhf',
mood: 'normal',
},
methods: {
changeMood() {
const arr = ['happy', 'sad', 'normal']
const index = Math.floor(Math.random() * 3)
this.mood = arr[index]
},
},
})
</script>
</body>
</html>
效果：
1.2 数组写法
数组写法适用于：要绑定多个样式，个数不确定，名字也不确定
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绑定class样式-数组写法</title>
<style>
.basic {
width: 400px;
height: 100px;
border: 1px solid black;
}
.zhf1 {
background-color: yellowgreen;
}
.zhf2 {
font-size: 30px;
text-shadow: 2px 2px 10px red;
}
.zhf3 {
border-radius: 20px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<!-- 准备好一个容器-->
<div id="root">
<!-- 绑定class样式--数组写法，适用于：要绑定的样式个数不确定、名字也不确定 -->
<div class="basic" :class="classArr">{{name}}</div>
</div>
<script>
Vue.config.productionTip = false
const vm = new Vue({
el: '#root',
data: {
name: 'zhf',
classArr: ['zhf1', 'zhf2', 'zhf3'],
},
})
</script>
</body>
</html>
效果：
1.3 对象写法
对象写法适用于：要绑定多个样式，个数确定，名字也确定，但不确定用不用
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绑定class样式-对象写法</title>
<style>
.basic {
width: 400px;
height: 100px;
border: 1px solid black;
}
.zhf1 {
background-color: yellowgreen;
}
.zhf2 {
font-size: 30px;
text-shadow: 2px 2px 10px red;
}
.zhf3 {
border-radius: 20px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<!-- 准备好一个容器-->
<div id="root">
<!-- 绑定class样式--对象写法，适用于：要绑定的样式个数确定、名字也确定，但要动态决定用不用 -->
<div class="basic" :class="classObj">{{name}}</div>
</div>
<script type="text/javascript">
Vue.config.productionTip = false
const vm = new Vue({
el: '#root',
data: {
name: 'zhf',
classObj: {
zhf1: true,
zhf2: false,
zhf3: true,
},
},
})
</script>
</body>
</html>
效果：
2. 绑定 style 样式
:style="xxx"
样式对象中的 key，必须是存在的 CSS 属性，如 fontSize、backgroundColor（小驼峰命名法）
2.1 对象写法
:style="对象"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绑定style样式-对象写法</title>
<style>
.basic {
width: 400px;
height: 100px;
border: 1px solid black;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<!-- 准备好一个容器-->
<div id="root">
<!-- 绑定style样式--对象写法 -->
<div class="basic" :style="styleObj, styleObj2">{{name}}</div>
</div>
<script type="text/javascript">
Vue.config.productionTip = false
const vm = new Vue({
el: '#root',
data: {
name: 'zhf',
styleObj: {
fontSize: '40px',
color: 'red',
},
styleObj2: {
backgroundColor: 'orange',
},
},
})
</script>
</body>
</html>
效果：
2.2 数组写法
:style="数组"
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>绑定style样式-数组写法</title>
<style>
.basic {
width: 400px;
height: 100px;
border: 1px solid black;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<!-- 准备好一个容器-->
<div id="root">
<!-- 绑定style样式--数组写法 -->
<div class="basic" :style="styleArr">{{name}}</div>
</div>
<script type="text/javascript">
Vue.config.productionTip = false
const vm = new Vue({
el: '#root',
data: {
name: 'zhf',
styleArr: [
{
fontSize: '40px',
color: 'blue',
},
{
backgroundColor: 'gray',
},
],
},
})
</script>
</body>
</html>
效果：
