vue--v-model表单控件绑定

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="width: 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：