v-model数据绑定

文本

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

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>

复选框

单个复选框，绑定数据到布尔值

<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

<div id='example-3'>
  <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>

new Vue({
  el: '#example-3',
  data: {
    checkedNames: []
  }
})

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>

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

下拉选择框

<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>

new Vue({
  el: '...',
  data: {
    selected: ''
  }
})

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>

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

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