v-bind动态绑定属性
Posted 鸟随二月
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1.基本使用
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<!-- 错误的做法: 这里不可以使用mustache语法-->
<!--<img src="{{imgURL}}" alt="">-->
<!-- 正确的做法: 使用v-bind指令 -->
<img v-bind:src="imgURL" alt="">
<a v-bind:href="aHref">百度一下</a>
<!--<h2>{{}}</h2>-->
<!--语法糖的写法-->
<img :src="imgURL" alt="">
<a :href="aHref">百度一下</a>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
imgURL: 'https://img11.360buyimg.com/mobilecms/s350x250_jfs/t1/20559/1/1424/73138/5c125595E3cbaa3c8/74fc2f84e53a9c23.jpg!q90!cc_350x250.webp',
aHref: 'http://www.baidu.com'
}
})
</script>
</body>
</html>
2.动态绑定class
2.1对象语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.active {
color: red;
}
</style>
</head>
<body>
<div id="app">
<!--<h2 class="active">{{message}}</h2>-->
<!--<h2 :class="active">{{message}}</h2>-->
<!--<h2 v-bind:class="{key1: value1, key2: value2}">{{message}}</h2>-->
<!--<h2 v-bind:class="{类名1: true, 类名2: boolean}">{{message}}</h2>-->
<h2 class="title" v-bind:class="{active: isActive, line: isLine}">{{message}}</h2>
<h2 class="title" v-bind:class="getClasses()">{{message}}</h2>
<button v-on:click="btnClick">按钮</button>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
isActive: true,
isLine: true
},
methods: {
btnClick: function () {
this.isActive = !this.isActive
},
getClasses: function () {
return {active: this.isActive, line: this.isLine}
}
}
})
</script>
</body>
</html>
v-bind数组语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<h2 class="title" :class="[active, line]">{{message}}</h2>
<h2 class="title" :class="getClasses()">{{message}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
active: 'aaaaaa',
line: 'bbbbbbb'
},
methods: {
getClasses: function () {
return [this.active, this.line]
}
}
})
</script>
</body>
</html>
v-bind 绑定style
对象语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.title {
font-size: 50px;
color: red;
}
</style>
</head>
<body>
<div id="app">
<!--<h2 :style="{key(属性名): value(属性值)}">{{message}}</h2>-->
<!--'50px'必须加上单引号, 否则是当做一个变量去解析-->
<!--<h2 :style="{fontSize: '50px'}">{{message}}</h2>-->
<!--finalSize当成一个变量使用-->
<h2 :style="{fontSize: finalSize + 'px', backgroundColor: finalColor}">{{message}}</h2>
<h2 :style="getStyles()">{{message}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
finalSize: 100,
finalColor: 'red',
},
methods: {
getStyles: function () {
return {fontSize: this.finalSize + 'px', backgroundColor: this.finalColor}
}
}
})
</script>
</body>
</html>
数组语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<h2 :style="[baseStyle, baseStyle1]">{{message}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
baseStyle: {backgroundColor: 'red'},
baseStyle1: {fontSize: '100px'},
}
})
</script>
</body>
</html>
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