1.表单绑定v-model
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<input type="text" v-model="message">
{{message}}
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊'
}
})
</script>
</body>
</html>
2.v-model原理
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<!--<input type="text" v-model="message">-->
<!--<input type="text" :value="message" @input="valueChange">-->
<input type="text" :value="message" @input="message = $event.target.value">
<!-- 也可以用change事件代替input事件 -->
<input type="text" :value="msg" @change="msg = $event.target.value">
<h2>{{message}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊'
},
methods: {
valueChange(event) {
this.message = event.target.value;
}
}
})
</script>
</body>
</html>
3.v-model：radio
存在多个单选框时，v-model结合radio类型
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<label for="male">
<!-- input都有value属性，保存input值，这里加上value的目的是双向数据绑定，获取用户选择的信息 -->
<!-- 把选中的单选框的value值双向绑定给了sex，得有value -->
<input type="radio" id="male" value="男" v-model="sex">男
</label>
<label for="female">
<input type="radio" id="female" value="女" v-model="sex">女
</label>
<h2>您选择的性别是: {{sex}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
sex: '男'
}
})
</script>
</body>
</html>
4.v-model：checkbox
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<!--1.checkbox单选框-->
<!--<label for="agree">-->
<!--<input type="checkbox" id="agree" v-model="isAgree">同意协议-->
<!--</label>-->
<!--<h2>您选择的是: {{isAgree}}</h2>-->
<!--<button :disabled="!isAgree">下一步</button>-->
<!--2.checkbox多选框-->
<!-- 把选中的复选框的value值双向绑定给了hobbies，得有value -->
<input type="checkbox" value="篮球" v-model="hobbies">篮球
<input type="checkbox" value="足球" v-model="hobbies">足球
<input type="checkbox" value="乒乓球" v-model="hobbies">乒乓球
<input type="checkbox" value="羽毛球" v-model="hobbies">羽毛球
<h2>您的爱好是: {{hobbies}}</h2>
<label v-for="item in originHobbies" :for="item">
<input type="checkbox" :value="item" :id="item" v-model="hobbies">{{item}}
</label>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
isAgree: false, // 单选框
hobbies: [], // 多选框,
originHobbies: ['篮球', '足球', '乒乓球', '羽毛球', '台球', '高尔夫球']
}
})
</script>
</body>
</html>
5.v-model：select
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<!--1.选择一个，v-model加给select，而不是option-->
<select name="abc" v-model="fruit">
<option value="苹果">苹果</option>
<option value="香蕉">香蕉</option>
<option value="榴莲">榴莲</option>
<option value="葡萄">葡萄</option>
</select>
<h2>您选择的水果是: {{fruit}}</h2>
<!--2.选择多个，加上属性multiple-->
<select name="abc" v-model="fruits" multiple>
<option value="苹果">苹果</option>
<option value="香蕉">香蕉</option>
<option value="榴莲">榴莲</option>
<option value="葡萄">葡萄</option>
</select>
<h2>您选择的水果是: {{fruits}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
fruit: '香蕉',
fruits: []
}
})
</script>
</body>
</html>
6.修饰符
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<!--1.修饰符: lazy-->
<input type="text" v-model.lazy="message">
<h2>{{message}}</h2>
<!--2.修饰符: number 【只要是数字开头，v-model.number的值类型都是number，否则是string】-->
<input type="number" v-model.number="age">
<h2>{{age}}-{{typeof age}}</h2>
<!--3.修饰符: trim-->
<input type="text" v-model.trim="name">
<h2>您输入的名字:{{name}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
age: 0,
name: ''
}
})
var age = 0
age = '1111'
age = '222'
</script>
</body>
</html>
7.值绑定
<!-- v-model中的值绑定 -->
<label v-for="item in originHobbies" :for="item">
<input type="checkbox" :value="item" :id="item" v-model="selectHobbies">{{item}}
</label>
<h3>你的选择是：{{selectHobbies}}</h3>