vue v-model 表单控件绑定

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

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <input v-model="message" placeholder="edit me">
     <p>Message is: {{ message }}</p>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             message: '绑定文本'
         }
     })
 </script>
 </html>

输出结果：

2、v-model 双向绑定多行文本，与上面的例子相似。

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <<span>Multiline message is:</span>
     <p style="white-space: pre">{{ message }}</p>
     <br>
     <textarea v-model="message" placeholder="add multiple lines"></textarea>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             message: '绑定多行文本'
         }
     })
 </script>
 </html>

输出结果：

3、v-model 绑定复选框

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <input type="checkbox" id="checkbox" v-model="checked">
     <label for="checkbox">{{ checked }}</label>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             checked: 'true'
         }
     })
 </script>
 </html>

输出结果：选中为true   不选中则为false

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <input type="checkbox" id="jack" value="刘二狗" v-model="checkedNames">
     <label for="jack">Jack</label>
     <input type="checkbox" id="john" value="张麻子" v-model="checkedNames">
     <label for="john">John</label>
     <input type="checkbox" id="mike" value="小狗子" v-model="checkedNames">
     <label for="mike">Mike</label>
     <br>
     <span>Checked names: {{ checkedNames }}</span>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             checkedNames: []
         }
     })
 </script>
 </html>

输出结果：

4、v-model 绑定单选按钮

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <input type="radio" id="one" value="One" v-model="picked">
     <label for="one">One</label>
     <br>
     <input type="radio" id="two" value="Two" v-model="picked">
     <label for="two">Two</label>
     <br>
     <span>Picked: {{ picked }}</span>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             picked: ''
         }
     })
 </script>
 </html>

输出结果：

5、v-model 绑定下拉列表

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <select v-model="selected">
         <option>A</option>
         <option>B</option>
         <option>C</option>
     </select>
     <span>Selected: {{ selected }}</span>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             selected: ''
         }
     })
 </script>
 </html>

输出结果：

多选列表

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <select v-model="selected" multiple style="width: 50px">
         <option>A</option>
         <option>B</option>
         <option>C</option>
     </select>
     <br>
     <span>Selected: {{ selected }}</span>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             selected: []
         }
     })
 </script>
 </html>

输出结果：

6、动态选项，用 v-for 渲染：

 <!DOCTYPE html>
 <html>
 <head lang="en">
     <meta charset="UTF-8">
     <title></title>
     <script type="text/javascript"  src="vue.js"></script>
 </head>
 <body>
 <div id="app">
     <select v-model="selected">
         <option v-for="option in options" v-bind:value="option.value">
             {{ option.text }}
         </option>
     </select>
     <span>Selected: {{ selected }}</span>
 </div>
 </body>
 <script>
     var vm = new Vue({
         el:"#app",
         data: {
             selected: 'A',
             options: [
                 { text: 'One', value: 'A' },
                 { text: 'Two', value: 'B' },
                 { text: 'Three', value: 'C' }
             ]
         }
     })
 </script>
 </html>

输出结果：