VUE学习十九，表单输入绑定v-model

你可以用 v-model 指令在表单 <input>、<textarea> 及 <select> 元素上创建双向数据绑定。

一、文本

<input v-model="message" placeholder="edit me">
<p>Message is: {{ message }}</p>

二、多行文本

<span>Multiline message is:</span>
<p style="white-space: pre-line;">{{ message }}</p>
<br>
<textarea v-model="message" placeholder="add multiple lines"></textarea>

三、复选框

单个复选框，绑定到布尔值：

<input type="checkbox" id="checkbox" v-model="checked">
<label for="checkbox">{{ checked }}</label>

多个复选框，绑定到同一个数组：

<input type="checkbox" id="jack" value="Jack" v-model="checkedNames">
<label for="jack">Jack</label>
<input type="checkbox" id="john" value="John" v-model="checkedNames">
<label for="john">John</label>
<input type="checkbox" id="mike" value="Mike" v-model="checkedNames">
<label for="mike">Mike</label>
<br>
<span>Checked names: {{ checkedNames }}</span>

四、单选按钮

<div id="example-4">
  <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>

五、选择框

<div id="example-5">
  <select v-model="selected">
    <option disabled value="">请选择</option>
    <option>A</option>
    <option>B</option>
    <option>C</option>
  </select>
  <span>Selected: {{ selected }}</span>
</div>

多选时 (绑定到一个数组)：

<div id="example-6">
  <select v-model="selected" multiple style=" 50px;">
    <option>A</option>
    <option>B</option>
    <option>C</option>
  </select>
  <br>
  <span>Selected: {{ selected }}</span>
</div>

用 v-for 渲染的动态选项：

<select v-model="selected">
  <option v-for="option in options" v-bind:value="option.value">
    {{ option.text }}
  </option>
</select>
<span>Selected: {{ selected }}</span>

六、整体代码参考

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>VUE简单示范</title>
<script type="text/javascript" src="../js/vue.js" charset="utf-8"></script>
</head>
<body>
<div id="example-1">
    <input v-model="message" placeholder="edit me">
    <p>Message is: {{ message }}</p>
    <span>Multiline message is:</span>
    <p style="white-space: pre-line;">{{ message1 }}</p>
    <br>
    <textarea v-model="message1" placeholder="add multiple lines"></textarea>    
    <br>
    <input type="checkbox" id="checkbox" v-model="checked">
    <label for="checkbox">{{ checked }}</label>
    <br>
    <input type="checkbox" id="jack" value="Jack" v-model="checkedNames">
    <label for="jack">Jack</label>
    <input type="checkbox" id="john" value="John" v-model="checkedNames">
    <label for="john">John</label>
    <input type="checkbox" id="mike" value="Mike" v-model="checkedNames">
    <label for="mike">Mike</label>
    <br>
    <span>Checked names: {{ checkedNames }}</span>
</div>
<div id="example-4">
  <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>
<div id="example-5">
  <select v-model="selected">
    <option disabled value="">请选择</option>
    <option>A</option>
    <option>B</option>
    <option>C</option>
  </select>
  <span>Selected: {{ selected }}</span>
</div>
<div id="example-6">
  <select v-model="selected" multiple style=" 50px;">
    <option>A</option>
    <option>B</option>
    <option>C</option>
  </select>
  <br>
  <span>Selected: {{ selected }}</span>
</div>
<div id="example-7">
    <select v-model="selected">
        <option v-for="option in options" v-bind:value="option.value">
        {{ option.text }}
        </option>
    </select>
<span>Selected: {{ selected }}</span>
</div>
<script>
var example1 = new Vue({
  el: '#example-1',
  data: {
    message: '',
    message1: '',
    checked: true,
    checkedNames: []
  }
})

var example4 = new Vue({
  el: '#example-4',
  data: {
    picked: ''
  }
})

var example5 = new Vue({
  el: '#example-5',
  data: {
    selected: 'C'
  }
})

var example6 = new Vue({
  el: '#example-6',
  data: {
    selected: []
  }
})

var example7 = new Vue({
  el: '#example-7',
  data: {
    selected: 'A',
    options: [
      { text: 'One', value: 'A' },
      { text: 'Two', value: 'B' },
      { text: 'Three', value: 'C' }
    ]
  }
})
</script>
</body>
</html>

本文参考：

https://cn.vuejs.org/v2/guide/forms.html

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原文地址：https://www.cnblogs.com/nayitian/p/14986724.html