原文链接：https://www.cnblogs.com/dyfbk/p/6868350.html
v-model 指令在表单控件元素上创建双向数据绑定，下面一一进行示例解释。
1、v-model 双向绑定文本
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <input v-model="message" placeholder="edit me">
11 <p>Message is: {{ message }}</p>
12 </div>
13 </body>
14 <script>
15 var vm = new Vue({
16 el:"#app",
17 data: {
18 message: '绑定文本'
19 }
20 })
21 </script>
22 </html>
输出结果：
2、v-model 双向绑定多行文本，与上面的例子相似。
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <<span>Multiline message is:</span>
11 <p style="white-space: pre">{{ message }}</p>
12 <br>
13 <textarea v-model="message" placeholder="add multiple lines"></textarea>
14 </div>
15 </body>
16 <script>
17 var vm = new Vue({
18 el:"#app",
19 data: {
20 message: '绑定多行文本'
21 }
22 })
23 </script>
24 </html>
输出结果：
3、v-model 绑定复选框
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <input type="checkbox" id="checkbox" v-model="checked">
11 <label for="checkbox">{{ checked }}</label>
12 </div>
13 </body>
14 <script>
15 var vm = new Vue({
16 el:"#app",
17 data: {
18 checked: 'true'
19 }
20 })
21 </script>
22 </html>
输出结果：选中为true 不选中则为false
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <input type="checkbox" id="jack" value="刘二狗" v-model="checkedNames">
11 <label for="jack">Jack</label>
12 <input type="checkbox" id="john" value="张麻子" v-model="checkedNames">
13 <label for="john">John</label>
14 <input type="checkbox" id="mike" value="小狗子" v-model="checkedNames">
15 <label for="mike">Mike</label>
16 <br>
17 <span>Checked names: {{ checkedNames }}</span>
18 </div>
19 </body>
20 <script>
21 var vm = new Vue({
22 el:"#app",
23 data: {
24 checkedNames: []
25 }
26 })
27 </script>
28 </html>
输出结果：
4、v-model 绑定单选按钮
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <input type="radio" id="one" value="One" v-model="picked">
11 <label for="one">One</label>
12 <br>
13 <input type="radio" id="two" value="Two" v-model="picked">
14 <label for="two">Two</label>
15 <br>
16 <span>Picked: {{ picked }}</span>
17 </div>
18 </body>
19 <script>
20 var vm = new Vue({
21 el:"#app",
22 data: {
23 picked: ''
24 }
25 })
26 </script>
27 </html>
输出结果：
5、v-model 绑定下拉列表
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <select v-model="selected">
11 <option>A</option>
12 <option>B</option>
13 <option>C</option>
14 </select>
15 <span>Selected: {{ selected }}</span>
16 </div>
17 </body>
18 <script>
19 var vm = new Vue({
20 el:"#app",
21 data: {
22 selected: ''
23 }
24 })
25 </script>
26 </html>
输出结果：
多选列表
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <select v-model="selected" multiple style=" 50px">
11 <option>A</option>
12 <option>B</option>
13 <option>C</option>
14 </select>
15 <br>
16 <span>Selected: {{ selected }}</span>
17 </div>
18 </body>
19 <script>
20 var vm = new Vue({
21 el:"#app",
22 data: {
23 selected: []
24 }
25 })
26 </script>
27 </html>
输出结果：
6、动态选项，用 v-for 渲染：
1 <!DOCTYPE html>
2 <html>
3 <head lang="en">
4 <meta charset="UTF-8">
5 <title></title>
6 <script type="text/javascript" src="vue.js"></script>
7 </head>
8 <body>
9 <div id="app">
10 <select v-model="selected">
11 <option v-for="option in options" v-bind:value="option.value">
12 {{ option.text }}
13 </option>
14 </select>
15 <span>Selected: {{ selected }}</span>
16 </div>
17 </body>
18 <script>
19 var vm = new Vue({
20 el:"#app",
21 data: {
22 selected: 'A',
23 options: [
24 { text: 'One', value: 'A' },
25 { text: 'Two', value: 'B' },
26 { text: 'Three', value: 'C' }
27 ]
28 }
29 })
30 </script>
31 </html>
输出结果：
