【Vue.js】Vue.js组件库Element中的单选框、多选框、输入框和计数器

小灰灰 2022-12-01 03:44 1670阅读 0赞

## 1、Radio 单选框 ##

#### 基础用法 ####

由于选项默认可见，不宜过多，若选项过多，建议使用 Select 选择器。  
![20200825170530408.png_pic_center][]  
要使用 Radio 组件，只需要设置v-model绑定变量，选中意味着变量的值为相应 Radio label属性的值，label可以是String、Number或Boolean。

<template>
      <el-radio v-model="radio" label="1">备选项</el-radio>
      <el-radio v-model="radio" label="2">备选项</el-radio>
    </template>
    
    <script> export default { data () { return { radio: '1' }; } } </script>

#### 禁用状态 ####

单选框不可用的状态。  
![20200825172245917.png_pic_center][]  
只要在el-radio元素中设置disabled属性即可，它接受一个Boolean，true为禁用。

<template>
      <el-radio disabled v-model="radio" label="禁用">备选项</el-radio>
      <el-radio disabled v-model="radio" label="选中且禁用">备选项</el-radio>
    </template>
    
    <script> export default { data () { return { radio: '选中且禁用' }; } } </script>

#### 单选框组 ####

适用于在多个互斥的选项中选择的场景。  
![20200825172817394.png_pic_center][]  
结合el-radio-group元素和子元素el-radio可以实现单选组，在el-radio-group中绑定v-model，在el-radio中设置好label即可，无需再给每一个el-radio绑定变量，另外，还提供了change事件来响应变化，它会传入一个参数value。

<template>
      <el-radio-group v-model="radio">
        <el-radio :label="3">备选项</el-radio>
        <el-radio :label="6">备选项</el-radio>
        <el-radio :label="9">备选项</el-radio>
      </el-radio-group>
    </template>
    
    <script> export default { data () { return { radio: 3 }; } } </script>

#### 按钮样式 ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center][]  
只需要把el-radio元素换成el-radio-button元素即可，此外，Element 还提供了size属性。

<template>
      <div>
        <el-radio-group v-model="radio1">
          <el-radio-button label="上海"></el-radio-button>
          <el-radio-button label="北京"></el-radio-button>
          <el-radio-button label="广州"></el-radio-button>
          <el-radio-button label="深圳"></el-radio-button>
        </el-radio-group>
      </div>
      <div style="margin-top: 20px">
        <el-radio-group v-model="radio2" size="medium">
          <el-radio-button label="上海" ></el-radio-button>
          <el-radio-button label="北京"></el-radio-button>
          <el-radio-button label="广州"></el-radio-button>
          <el-radio-button label="深圳"></el-radio-button>
        </el-radio-group>
      </div>
      <div style="margin-top: 20px">
        <el-radio-group v-model="radio3" size="small">
          <el-radio-button label="上海"></el-radio-button>
          <el-radio-button label="北京" disabled ></el-radio-button>
          <el-radio-button label="广州"></el-radio-button>
          <el-radio-button label="深圳"></el-radio-button>
        </el-radio-group>
      </div>
      <div style="margin-top: 20px">
        <el-radio-group v-model="radio4" disabled size="mini">
          <el-radio-button label="上海"></el-radio-button>
          <el-radio-button label="北京"></el-radio-button>
          <el-radio-button label="广州"></el-radio-button>
          <el-radio-button label="深圳"></el-radio-button>
        </el-radio-group>
      </div>
    </template>
    
    <script> export default { data () { return { radio1: '上海', radio2: '上海', radio3: '上海', radio4: '上海' }; } } </script>

#### 带有边框 ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center 1][]  
设置border属性可以渲染为带有边框的单选框。

<template>
      <div>
        <el-radio v-model="radio1" label="1" border>备选项1</el-radio>
        <el-radio v-model="radio1" label="2" border>备选项2</el-radio>
      </div>
      <div style="margin-top: 20px">
        <el-radio v-model="radio2" label="1" border size="medium">备选项1</el-radio>
        <el-radio v-model="radio2" label="2" border size="medium">备选项2</el-radio>
      </div>
      <div style="margin-top: 20px">
        <el-radio-group v-model="radio3" size="small">
          <el-radio label="1" border>备选项1</el-radio>
          <el-radio label="2" border disabled>备选项2</el-radio>
        </el-radio-group>
      </div>
      <div style="margin-top: 20px">
        <el-radio-group v-model="radio4" size="mini" disabled>
          <el-radio label="1" border>备选项1</el-radio>
          <el-radio label="2" border>备选项2</el-radio>
        </el-radio-group>
      </div>
    </template>
    
    <script> export default { data () { return { radio1: '1', radio2: '1', radio3: '1', radio4: '1' }; } } </script>

#### Radio Attributes ####

#### Radio Events ####

<table> 
 <thead> 
  <tr> 
   <th>事件名称</th> 
   <th>说明</th> 
   <th>回调参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>change</td> 
   <td>绑定值变化时触发的事件</td> 
   <td>选中的 Radio label 值</td> 
  </tr> 
 </tbody> 
</table>

#### Radio-group Attributes ####

#### Radio-group Events ####

#### Radio-button Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>label</td> 
   <td>Radio 的 value</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>是否禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生 name 属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
 </tbody> 
</table>

## 2、Checkbox 多选框 ##

#### 基础用法 ####

单独使用可以表示两种状态之间的切换，写在标签中的内容为 checkbox 按钮后的介绍。  
![20200825182031316.png_pic_center][]  
在el-checkbox元素中定义v-model绑定变量，单一的checkbox中，默认绑定变量的值会是Boolean，选中为true。

<template>
      
      <el-checkbox v-model="checked">备选项</el-checkbox>
    </template>
    <script> export default { data() { return { checked: true }; } }; </script>

#### 禁用状态 ####

![20200825182407114.png_pic_center][]  
设置disabled属性即可。

<template>
      <el-checkbox v-model="checked1" disabled>备选项1</el-checkbox>
      <el-checkbox v-model="checked2" disabled>备选项</el-checkbox>
    </template>
    <script> export default { data() { return { checked1: false, checked2: true }; } }; </script>

#### 多选框组 ####

适用于多个勾选框绑定到同一个数组的情景，通过是否勾选来表示这一组选项中选中的项。  
![20200826084049199.png_pic_center][]  
checkbox-group元素能把多个 checkbox 管理为一组，只需要在 Group 中使用v-model绑定Array类型的变量即可。 el-checkbox 的 label属性是该 checkbox 对应的值，若该标签中无内容，则该属性也充当 checkbox 按钮后的介绍。label与数组中的元素值相对应，如果存在指定的值则为选中状态，否则为不选中。

<template>
      <el-checkbox-group v-model="checkList">
        <el-checkbox label="复选框 A"></el-checkbox>
        <el-checkbox label="复选框 B"></el-checkbox>
        <el-checkbox label="复选框 C"></el-checkbox>
        <el-checkbox label="禁用" disabled></el-checkbox>
        <el-checkbox label="选中且禁用" disabled></el-checkbox>
      </el-checkbox-group>
    </template>
    
    <script> export default { data () { return { checkList: ['选中且禁用','复选框 A'] }; } }; </script>

#### indeterminate 状态 ####

indeterminate 属性用以表示 checkbox 的不确定状态，一般用于实现全选的效果。  
![20200826085407880.png_pic_center][]

<template>
      <el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange">全选</el-checkbox>
      <div style="margin: 15px 0;"></div>
      <el-checkbox-group v-model="checkedCities" @change="handleCheckedCitiesChange">
        <el-checkbox v-for="city in cities" :label="city" :key="city">{
       {city}}</el-checkbox>
      </el-checkbox-group>
    </template>
    <script> const cityOptions = ['上海', '北京', '广州', '深圳']; export default { data() { return { checkAll: false, checkedCities: ['上海', '北京'], cities: cityOptions, isIndeterminate: true }; }, methods: { handleCheckAllChange(val) { this.checkedCities = val ? cityOptions : []; this.isIndeterminate = false; }, handleCheckedCitiesChange(value) { let checkedCount = value.length; this.checkAll = checkedCount === this.cities.length; this.isIndeterminate = checkedCount > 0 && checkedCount < this.cities.length; } } }; </script>

#### 可选项目数量的限制 ####

使用 min 和 max 属性能够限制可以被勾选的项目的数量。  
![20200826090052630.png_pic_center][]

<template>
      <el-checkbox-group v-model="checkedCities" :min="1" :max="2">
        <el-checkbox v-for="city in cities" :label="city" :key="city">{
       {city}}</el-checkbox>
      </el-checkbox-group>
    </template>
    <script> const cityOptions = ['上海', '北京', '广州', '深圳']; export default { data() { return { checkedCities: ['上海', '北京'], cities: cityOptions }; } }; </script>

#### 按钮样式 ####

按钮样式的多选组合。  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center 2][]  
只需要把el-checkbox元素替换为el-checkbox-button元素即可。此外，Element 还提供了size属性。

<template>
      <div>
        <el-checkbox-group v-model="checkboxGroup1">
          <el-checkbox-button v-for="city in cities" :label="city" :key="city">{
       {city}}</el-checkbox-button>
        </el-checkbox-group>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox-group v-model="checkboxGroup2" size="medium">
          <el-checkbox-button v-for="city in cities" :label="city" :key="city">{
       {city}}</el-checkbox-button>
        </el-checkbox-group>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox-group v-model="checkboxGroup3" size="small">
          <el-checkbox-button v-for="city in cities" :label="city" :disabled="city === '北京'" :key="city">{
       {city}}</el-checkbox-button>
        </el-checkbox-group>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox-group v-model="checkboxGroup4" size="mini" disabled>
          <el-checkbox-button v-for="city in cities" :label="city" :key="city">{
       {city}}</el-checkbox-button>
        </el-checkbox-group>
      </div>
    </template>
    <script> const cityOptions = ['上海', '北京', '广州', '深圳']; export default { data () { return { checkboxGroup1: ['上海'], checkboxGroup2: ['上海'], checkboxGroup3: ['上海'], checkboxGroup4: ['上海'], cities: cityOptions }; } } </script>

#### 带有边框 ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center 3][]  
设置border属性可以渲染为带有边框的多选框。

<template>
      <div>
        <el-checkbox v-model="checked1" label="备选项1" border></el-checkbox>
        <el-checkbox v-model="checked2" label="备选项2" border></el-checkbox>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox v-model="checked3" label="备选项1" border size="medium"></el-checkbox>
        <el-checkbox v-model="checked4" label="备选项2" border size="medium"></el-checkbox>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox-group v-model="checkboxGroup1" size="small">
          <el-checkbox label="备选项1" border></el-checkbox>
          <el-checkbox label="备选项2" border disabled></el-checkbox>
        </el-checkbox-group>
      </div>
      <div style="margin-top: 20px">
        <el-checkbox-group v-model="checkboxGroup2" size="mini" disabled>
          <el-checkbox label="备选项1" border></el-checkbox>
          <el-checkbox label="备选项2" border></el-checkbox>
        </el-checkbox-group>
      </div>
    </template>
    
    <script> export default { data () { return { checked1: true, checked2: false, checked3: false, checked4: true, checkboxGroup1: [], checkboxGroup2: [] }; } } </script>

#### Checkbox Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>value / v-model</td> 
   <td>绑定值</td> 
   <td>string / number / boolean</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>label</td> 
   <td>选中状态的值（只有在checkbox-group或者绑定对象类型为array时有效）</td> 
   <td>string / number / boolean</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>true-label</td> 
   <td>选中时的值</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>false-label</td> 
   <td>没有选中时的值</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>是否禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>border</td> 
   <td>是否显示边框</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>size</td> 
   <td>Checkbox 的尺寸，仅在 border 为真时有效</td> 
   <td>string</td> 
   <td>medium / small / mini</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生 name 属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>checked</td> 
   <td>当前是否勾选</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>indeterminate</td> 
   <td>设置 indeterminate 状态，只负责样式控制</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
 </tbody> 
</table>

#### Checkbox Events ####

<table> 
 <thead> 
  <tr> 
   <th>事件名称</th> 
   <th>说明</th> 
   <th>回调参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>change</td> 
   <td>当绑定值变化时触发的事件</td> 
   <td>更新后的值</td> 
  </tr> 
 </tbody> 
</table>

#### Checkbox-group Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>value / v-model</td> 
   <td>绑定值</td> 
   <td>array</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>size</td> 
   <td>多选框组尺寸，仅对按钮形式的 Checkbox 或带有边框的 Checkbox 有效</td> 
   <td>string</td> 
   <td>medium / small / mini</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>是否禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>min</td> 
   <td>可被勾选的 checkbox 的最小数量</td> 
   <td>number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>max</td> 
   <td>可被勾选的 checkbox 的最大数量</td> 
   <td>number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>text-color</td> 
   <td>按钮形式的 Checkbox 激活时的文本颜色</td> 
   <td>string</td> 
   <td>—</td> 
   <td>#ffffff</td> 
  </tr> 
  <tr> 
   <td>fill</td> 
   <td>按钮形式的 Checkbox 激活时的填充色和边框色</td> 
   <td>string</td> 
   <td>—</td> 
   <td>#409EFF</td> 
  </tr> 
 </tbody> 
</table>

#### Checkbox-group Events ####

#### Checkbox-button Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>label</td> 
   <td>选中状态的值（只有在checkbox-group或者绑定对象类型为array时有效）</td> 
   <td>string / number / boolean</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>true-label</td> 
   <td>选中时的值</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>false-label</td> 
   <td>没有选中时的值</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>是否禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生 name 属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>checked</td> 
   <td>当前是否勾选</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
 </tbody> 
</table>

## 3、Input 输入框 ##

通过鼠标或键盘输入字符。Input 为受控组件，它总会显示 Vue 绑定值。通常情况下，应当处理 input 事件，并更新组件的绑定值（或使用v-model）。否则，输入框内显示的值将不会改变。不支持 v-model 修饰符。

#### 基础用法 ####

![20200826094400986.png_pic_center][]

<el-input v-model="input" placeholder="请输入内容"></el-input>
    
    <script> export default { data() { return { input: '' } } } </script>

#### 禁用状态 ####

![20200826094624662.png_pic_center][]  
通过 disabled 属性指定是否禁用 input 组件。

<el-input placeholder="请输入内容" v-model="input" :disabled="true">
    </el-input>
    
    <script> export default { data() { return { input: '' } } } </script>

#### 可清空 ####

![20200826094835363.png_pic_center][]  
使用clearable属性即可得到一个可清空的输入框。

<el-input placeholder="请输入内容" v-model="input" clearable>
    </el-input>
    
    <script> export default { data() { return { input: '' } } } </script>

#### 密码框 ####

![20200826095058196.png_pic_center][]  
使用show-password属性即可得到一个可切换显示隐藏的密码框。

<el-input placeholder="请输入密码" v-model="input" show-password></el-input>
    
    <script> export default { data() { return { input: '' } } } </script>

#### 带 icon 的输入框 ####

带有图标标记输入类型。  
![20200826095711564.png_pic_center][]  
可以通过 prefix-icon 和 suffix-icon 属性在 input 组件首部和尾部增加显示图标，也可以通过 slot 来放置图标。

<div class="demo-input-suffix">
      属性方式：
      <el-input placeholder="请选择日期" suffix-icon="el-icon-date" v-model="input1">
      </el-input>
      <el-input placeholder="请输入内容" prefix-icon="el-icon-search" v-model="input2">
      </el-input>
    </div>
    <div class="demo-input-suffix">
      slot 方式：
      <el-input placeholder="请选择日期" v-model="input3">
        <i slot="suffix" class="el-input__icon el-icon-date"></i>
      </el-input>
      <el-input placeholder="请输入内容" v-model="input4">
        <i slot="prefix" class="el-input__icon el-icon-search"></i>
      </el-input>
    </div>
    
    <script> export default { data() { return { input1: '', input2: '', input3: '', input4: '' } } } </script>

#### 文本域 ####

用于输入多行文本信息，通过将 type 属性的值指定为 textarea。  
![20200826095952368.png_pic_center][]  
文本域高度可通过 rows 属性控制。

<el-input type="textarea" :rows="2" placeholder="请输入内容" v-model="textarea">
    </el-input>
    
    <script> export default { data() { return { textarea: '' } } } </script>

#### 可自适应文本高度的文本域 ####

通过设置 autosize 属性可以使得文本域的高度能够根据文本内容自动进行调整，并且 autosize 还可以设定为一个对象，指定最小行数和最大行数。  
![20200826100325138.png_pic_center][]

<el-input type="textarea" autosize placeholder="请输入内容" v-model="textarea1">
    </el-input>
    <div style="margin: 20px 0;"></div>
    <el-input type="textarea" :autosize="{ minRows: 2, maxRows: 4}" placeholder="请输入内容" v-model="textarea2">
    </el-input>
    
    <script> export default { data() { return { textarea1: '', textarea2: '' } } } </script>

#### 复合型输入框 ####

可前置或后置元素，一般为标签或按钮。  
![20200826101737322.png_pic_center][]  
可通过 slot 来指定在 input 中前置或者后置内容。

<div>
      <el-input placeholder="请输入内容" v-model="input1">
        <template slot="prepend">Http://</template>
      </el-input>
    </div>
    <div style="margin-top: 15px;">
      <el-input placeholder="请输入内容" v-model="input2">
        <template slot="append">.com</template>
      </el-input>
    </div>
    <div style="margin-top: 15px;">
      <el-input placeholder="请输入内容" v-model="input3" class="input-with-select">
        <el-select v-model="select" slot="prepend" placeholder="请选择">
          <el-option label="餐厅名" value="1"></el-option>
          <el-option label="订单号" value="2"></el-option>
          <el-option label="用户电话" value="3"></el-option>
        </el-select>
        <el-button slot="append" icon="el-icon-search"></el-button>
      </el-input>
    </div>
    <style> .el-select .el-input { width: 130px; } .input-with-select .el-input-group__prepend { background-color: #fff; } </style>
    <script> export default { data() { return { input1: '', input2: '', input3: '', select: '' } } } </script>

#### 尺寸 ####

![20200826102203121.png_pic_center][]  
可通过 size 属性指定输入框的尺寸，除了默认的大小外，还提供了 large、small 和 mini 三种尺寸。

<div class="demo-input-size">
      <el-input placeholder="请输入内容" suffix-icon="el-icon-date" v-model="input1">
      </el-input>
      <el-input size="medium" placeholder="请输入内容" suffix-icon="el-icon-date" v-model="input2">
      </el-input>
      <el-input size="small" placeholder="请输入内容" suffix-icon="el-icon-date" v-model="input3">
      </el-input>
      <el-input size="mini" placeholder="请输入内容" suffix-icon="el-icon-date" v-model="input4">
      </el-input>
    </div>
    
    <script> export default { data() { return { input1: '', input2: '', input3: '', input4: '' } } } </script>

#### 带输入建议 ####

根据输入内容提供对应的输入建议。  
![20200826104107407.png_pic_center][]  
autocomplete 是一个可带输入建议的输入框组件，fetch-suggestions 是一个返回输入建议的方法属性，如 querySearch(queryString, cb)，在该方法中你可以在你的输入建议数据准备好时通过 cb(data) 返回到 autocomplete 组件中。

<el-row class="demo-autocomplete">
      <el-col :span="12">
        <div class="sub-title">激活即列出输入建议</div>
        <el-autocomplete class="inline-input" v-model="state1" :fetch-suggestions="querySearch" placeholder="请输入内容" @select="handleSelect" ></el-autocomplete>
      </el-col>
      <el-col :span="12">
        <div class="sub-title">输入后匹配输入建议</div>
        <el-autocomplete class="inline-input" v-model="state2" :fetch-suggestions="querySearch" placeholder="请输入内容" :trigger-on-focus="false" @select="handleSelect" ></el-autocomplete>
      </el-col>
    </el-row>
    <script> export default { data() { return { restaurants: [], state1: '', state2: '' }; }, methods: { querySearch(queryString, cb) { var restaurants = this.restaurants; var results = queryString ? restaurants.filter(this.createFilter(queryString)) : restaurants; // 调用 callback 返回建议列表的数据 cb(results); }, createFilter(queryString) { return (restaurant) => { return (restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0); }; }, loadAll() { return [ { "value": "三全鲜食（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "Hot honey 首尔炸鸡（仙霞路）", "address": "上海市长宁区淞虹路661号" }, { "value": "新旺角茶餐厅", "address": "上海市普陀区真北路988号创邑金沙谷6号楼113" }, { "value": "泷千家(天山西路店)", "address": "天山西路438号" }, { "value": "胖仙女纸杯蛋糕（上海凌空店）", "address": "上海市长宁区金钟路968号1幢18号楼一层商铺18-101" }, { "value": "贡茶", "address": "上海市长宁区金钟路633号" }, { "value": "豪大大香鸡排超级奶爸", "address": "上海市嘉定区曹安公路曹安路1685号" }, { "value": "茶芝兰（奶茶，手抓饼）", "address": "上海市普陀区同普路1435号" }, { "value": "十二泷町", "address": "上海市北翟路1444弄81号B幢-107" }, { "value": "星移浓缩咖啡", "address": "上海市嘉定区新郁路817号" }, { "value": "阿姨奶茶/豪大大", "address": "嘉定区曹安路1611号" }, { "value": "新麦甜四季甜品炸鸡", "address": "嘉定区曹安公路2383弄55号" }, { "value": "Monica摩托主题咖啡店", "address": "嘉定区江桥镇曹安公路2409号1F，2383弄62号1F" }, { "value": "浮生若茶（凌空soho店）", "address": "上海长宁区金钟路968号9号楼地下一层" }, { "value": "NONO JUICE 鲜榨果汁", "address": "上海市长宁区天山西路119号" }, { "value": "CoCo都可(北新泾店）", "address": "上海市长宁区仙霞西路" }, { "value": "快乐柠檬（神州智慧店）", "address": "上海市长宁区天山西路567号1层R117号店铺" }, { "value": "Merci Paul cafe", "address": "上海市普陀区光复西路丹巴路28弄6号楼819" }, { "value": "猫山王（西郊百联店）", "address": "上海市长宁区仙霞西路88号第一层G05-F01-1-306" }, { "value": "枪会山", "address": "上海市普陀区棕榈路" }, { "value": "纵食", "address": "元丰天山花园(东门) 双流路267号" }, { "value": "钱记", "address": "上海市长宁区天山西路" }, { "value": "壹杯加", "address": "上海市长宁区通协路" }, { "value": "唦哇嘀咖", "address": "上海市长宁区新泾镇金钟路999号2幢（B幢）第01层第1-02A单元" }, { "value": "爱茜茜里(西郊百联)", "address": "长宁区仙霞西路88号1305室" }, { "value": "爱茜茜里(近铁广场)", "address": "上海市普陀区真北路818号近铁城市广场北区地下二楼N-B2-O2-C商铺" }, { "value": "鲜果榨汁（金沙江路和美广店）", "address": "普陀区金沙江路2239号金沙和美广场B1-10-6" }, { "value": "开心丽果（缤谷店）", "address": "上海市长宁区威宁路天山路341号" }, { "value": "超级鸡车（丰庄路店）", "address": "上海市嘉定区丰庄路240号" }, { "value": "妙生活果园（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "香宜度麻辣香锅", "address": "长宁区淞虹路148号" }, { "value": "凡仔汉堡（老真北路店）", "address": "上海市普陀区老真北路160号" }, { "value": "港式小铺", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "蜀香源麻辣香锅（剑河路店）", "address": "剑河路443-1" }, { "value": "北京饺子馆", "address": "长宁区北新泾街道天山西路490-1号" }, { "value": "饭典*新简餐（凌空SOHO店）", "address": "上海市长宁区金钟路968号9号楼地下一层9-83室" }, { "value": "焦耳·川式快餐（金钟路店）", "address": "上海市金钟路633号地下一层甲部" }, { "value": "动力鸡车", "address": "长宁区仙霞西路299弄3号101B" }, { "value": "浏阳蒸菜", "address": "天山西路430号" }, { "value": "四海游龙（天山西路店）", "address": "上海市长宁区天山西路" }, { "value": "樱花食堂（凌空店）", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "壹分米客家传统调制米粉(天山店)", "address": "天山西路428号" }, { "value": "福荣祥烧腊（平溪路店）", "address": "上海市长宁区协和路福泉路255弄57-73号" }, { "value": "速记黄焖鸡米饭", "address": "上海市长宁区北新泾街道金钟路180号1层01号摊位" }, { "value": "红辣椒麻辣烫", "address": "上海市长宁区天山西路492号" }, { "value": "(小杨生煎)西郊百联餐厅", "address": "长宁区仙霞西路88号百联2楼" }, { "value": "阳阳麻辣烫", "address": "天山西路389号" }, { "value": "南拳妈妈龙虾盖浇饭", "address": "普陀区金沙江路1699号鑫乐惠美食广场A13" } ]; }, handleSelect(item) { console.log(item); } }, mounted() { this.restaurants = this.loadAll(); } } </script>

#### 自定义模板 ####

可自定义输入建议的显示。  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center 4][]  
使用scoped slot自定义输入建议的模板。该 scope 的参数为item，表示当前输入建议对象。

<el-autocomplete popper-class="my-autocomplete" v-model="state" :fetch-suggestions="querySearch" placeholder="请输入内容" @select="handleSelect">
      <i class="el-icon-edit el-input__icon" slot="suffix" @click="handleIconClick">
      </i>
      <template slot-scope="{ item }">
        <div class="name">{
       { item.value }}</div>
        <span class="addr">{
       { item.address }}</span>
      </template>
    </el-autocomplete>
    
    <style> .my-autocomplete { li { line-height: normal; padding: 7px; .name { text-overflow: ellipsis; overflow: hidden; } .addr { font-size: 12px; color: #b4b4b4; } .highlighted .addr { color: #ddd; } } } </style>
    
    <script> export default { data() { return { restaurants: [], state: '' }; }, methods: { querySearch(queryString, cb) { var restaurants = this.restaurants; var results = queryString ? restaurants.filter(this.createFilter(queryString)) : restaurants; // 调用 callback 返回建议列表的数据 cb(results); }, createFilter(queryString) { return (restaurant) => { return (restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0); }; }, loadAll() { return [ { "value": "三全鲜食（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "Hot honey 首尔炸鸡（仙霞路）", "address": "上海市长宁区淞虹路661号" }, { "value": "新旺角茶餐厅", "address": "上海市普陀区真北路988号创邑金沙谷6号楼113" }, { "value": "泷千家(天山西路店)", "address": "天山西路438号" }, { "value": "胖仙女纸杯蛋糕（上海凌空店）", "address": "上海市长宁区金钟路968号1幢18号楼一层商铺18-101" }, { "value": "贡茶", "address": "上海市长宁区金钟路633号" }, { "value": "豪大大香鸡排超级奶爸", "address": "上海市嘉定区曹安公路曹安路1685号" }, { "value": "茶芝兰（奶茶，手抓饼）", "address": "上海市普陀区同普路1435号" }, { "value": "十二泷町", "address": "上海市北翟路1444弄81号B幢-107" }, { "value": "星移浓缩咖啡", "address": "上海市嘉定区新郁路817号" }, { "value": "阿姨奶茶/豪大大", "address": "嘉定区曹安路1611号" }, { "value": "新麦甜四季甜品炸鸡", "address": "嘉定区曹安公路2383弄55号" }, { "value": "Monica摩托主题咖啡店", "address": "嘉定区江桥镇曹安公路2409号1F，2383弄62号1F" }, { "value": "浮生若茶（凌空soho店）", "address": "上海长宁区金钟路968号9号楼地下一层" }, { "value": "NONO JUICE 鲜榨果汁", "address": "上海市长宁区天山西路119号" }, { "value": "CoCo都可(北新泾店）", "address": "上海市长宁区仙霞西路" }, { "value": "快乐柠檬（神州智慧店）", "address": "上海市长宁区天山西路567号1层R117号店铺" }, { "value": "Merci Paul cafe", "address": "上海市普陀区光复西路丹巴路28弄6号楼819" }, { "value": "猫山王（西郊百联店）", "address": "上海市长宁区仙霞西路88号第一层G05-F01-1-306" }, { "value": "枪会山", "address": "上海市普陀区棕榈路" }, { "value": "纵食", "address": "元丰天山花园(东门) 双流路267号" }, { "value": "钱记", "address": "上海市长宁区天山西路" }, { "value": "壹杯加", "address": "上海市长宁区通协路" }, { "value": "唦哇嘀咖", "address": "上海市长宁区新泾镇金钟路999号2幢（B幢）第01层第1-02A单元" }, { "value": "爱茜茜里(西郊百联)", "address": "长宁区仙霞西路88号1305室" }, { "value": "爱茜茜里(近铁广场)", "address": "上海市普陀区真北路818号近铁城市广场北区地下二楼N-B2-O2-C商铺" }, { "value": "鲜果榨汁（金沙江路和美广店）", "address": "普陀区金沙江路2239号金沙和美广场B1-10-6" }, { "value": "开心丽果（缤谷店）", "address": "上海市长宁区威宁路天山路341号" }, { "value": "超级鸡车（丰庄路店）", "address": "上海市嘉定区丰庄路240号" }, { "value": "妙生活果园（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "香宜度麻辣香锅", "address": "长宁区淞虹路148号" }, { "value": "凡仔汉堡（老真北路店）", "address": "上海市普陀区老真北路160号" }, { "value": "港式小铺", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "蜀香源麻辣香锅（剑河路店）", "address": "剑河路443-1" }, { "value": "北京饺子馆", "address": "长宁区北新泾街道天山西路490-1号" }, { "value": "饭典*新简餐（凌空SOHO店）", "address": "上海市长宁区金钟路968号9号楼地下一层9-83室" }, { "value": "焦耳·川式快餐（金钟路店）", "address": "上海市金钟路633号地下一层甲部" }, { "value": "动力鸡车", "address": "长宁区仙霞西路299弄3号101B" }, { "value": "浏阳蒸菜", "address": "天山西路430号" }, { "value": "四海游龙（天山西路店）", "address": "上海市长宁区天山西路" }, { "value": "樱花食堂（凌空店）", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "壹分米客家传统调制米粉(天山店)", "address": "天山西路428号" }, { "value": "福荣祥烧腊（平溪路店）", "address": "上海市长宁区协和路福泉路255弄57-73号" }, { "value": "速记黄焖鸡米饭", "address": "上海市长宁区北新泾街道金钟路180号1层01号摊位" }, { "value": "红辣椒麻辣烫", "address": "上海市长宁区天山西路492号" }, { "value": "(小杨生煎)西郊百联餐厅", "address": "长宁区仙霞西路88号百联2楼" }, { "value": "阳阳麻辣烫", "address": "天山西路389号" }, { "value": "南拳妈妈龙虾盖浇饭", "address": "普陀区金沙江路1699号鑫乐惠美食广场A13" } ]; }, handleSelect(item) { console.log(item); }, handleIconClick(ev) { console.log(ev); } }, mounted() { this.restaurants = this.loadAll(); } } </script>

#### 远程搜索 ####

从服务端搜索数据。  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dvbmd4aWZhY2FpX2JlbGlldmU_size_16_color_FFFFFF_t_70_pic_center 5][]

<el-autocomplete v-model="state" :fetch-suggestions="querySearchAsync" placeholder="请输入内容" @select="handleSelect" ></el-autocomplete>
    <script> export default { data() { return { restaurants: [], state: '', timeout: null }; }, methods: { loadAll() { return [ { "value": "三全鲜食（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "Hot honey 首尔炸鸡（仙霞路）", "address": "上海市长宁区淞虹路661号" }, { "value": "新旺角茶餐厅", "address": "上海市普陀区真北路988号创邑金沙谷6号楼113" }, { "value": "泷千家(天山西路店)", "address": "天山西路438号" }, { "value": "胖仙女纸杯蛋糕（上海凌空店）", "address": "上海市长宁区金钟路968号1幢18号楼一层商铺18-101" }, { "value": "贡茶", "address": "上海市长宁区金钟路633号" }, { "value": "豪大大香鸡排超级奶爸", "address": "上海市嘉定区曹安公路曹安路1685号" }, { "value": "茶芝兰（奶茶，手抓饼）", "address": "上海市普陀区同普路1435号" }, { "value": "十二泷町", "address": "上海市北翟路1444弄81号B幢-107" }, { "value": "星移浓缩咖啡", "address": "上海市嘉定区新郁路817号" }, { "value": "阿姨奶茶/豪大大", "address": "嘉定区曹安路1611号" }, { "value": "新麦甜四季甜品炸鸡", "address": "嘉定区曹安公路2383弄55号" }, { "value": "Monica摩托主题咖啡店", "address": "嘉定区江桥镇曹安公路2409号1F，2383弄62号1F" }, { "value": "浮生若茶（凌空soho店）", "address": "上海长宁区金钟路968号9号楼地下一层" }, { "value": "NONO JUICE 鲜榨果汁", "address": "上海市长宁区天山西路119号" }, { "value": "CoCo都可(北新泾店）", "address": "上海市长宁区仙霞西路" }, { "value": "快乐柠檬（神州智慧店）", "address": "上海市长宁区天山西路567号1层R117号店铺" }, { "value": "Merci Paul cafe", "address": "上海市普陀区光复西路丹巴路28弄6号楼819" }, { "value": "猫山王（西郊百联店）", "address": "上海市长宁区仙霞西路88号第一层G05-F01-1-306" }, { "value": "枪会山", "address": "上海市普陀区棕榈路" }, { "value": "纵食", "address": "元丰天山花园(东门) 双流路267号" }, { "value": "钱记", "address": "上海市长宁区天山西路" }, { "value": "壹杯加", "address": "上海市长宁区通协路" }, { "value": "唦哇嘀咖", "address": "上海市长宁区新泾镇金钟路999号2幢（B幢）第01层第1-02A单元" }, { "value": "爱茜茜里(西郊百联)", "address": "长宁区仙霞西路88号1305室" }, { "value": "爱茜茜里(近铁广场)", "address": "上海市普陀区真北路818号近铁城市广场北区地下二楼N-B2-O2-C商铺" }, { "value": "鲜果榨汁（金沙江路和美广店）", "address": "普陀区金沙江路2239号金沙和美广场B1-10-6" }, { "value": "开心丽果（缤谷店）", "address": "上海市长宁区威宁路天山路341号" }, { "value": "超级鸡车（丰庄路店）", "address": "上海市嘉定区丰庄路240号" }, { "value": "妙生活果园（北新泾店）", "address": "长宁区新渔路144号" }, { "value": "香宜度麻辣香锅", "address": "长宁区淞虹路148号" }, { "value": "凡仔汉堡（老真北路店）", "address": "上海市普陀区老真北路160号" }, { "value": "港式小铺", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "蜀香源麻辣香锅（剑河路店）", "address": "剑河路443-1" }, { "value": "北京饺子馆", "address": "长宁区北新泾街道天山西路490-1号" }, { "value": "饭典*新简餐（凌空SOHO店）", "address": "上海市长宁区金钟路968号9号楼地下一层9-83室" }, { "value": "焦耳·川式快餐（金钟路店）", "address": "上海市金钟路633号地下一层甲部" }, { "value": "动力鸡车", "address": "长宁区仙霞西路299弄3号101B" }, { "value": "浏阳蒸菜", "address": "天山西路430号" }, { "value": "四海游龙（天山西路店）", "address": "上海市长宁区天山西路" }, { "value": "樱花食堂（凌空店）", "address": "上海市长宁区金钟路968号15楼15-105室" }, { "value": "壹分米客家传统调制米粉(天山店)", "address": "天山西路428号" }, { "value": "福荣祥烧腊（平溪路店）", "address": "上海市长宁区协和路福泉路255弄57-73号" }, { "value": "速记黄焖鸡米饭", "address": "上海市长宁区北新泾街道金钟路180号1层01号摊位" }, { "value": "红辣椒麻辣烫", "address": "上海市长宁区天山西路492号" }, { "value": "(小杨生煎)西郊百联餐厅", "address": "长宁区仙霞西路88号百联2楼" }, { "value": "阳阳麻辣烫", "address": "天山西路389号" }, { "value": "南拳妈妈龙虾盖浇饭", "address": "普陀区金沙江路1699号鑫乐惠美食广场A13" } ]; }, querySearchAsync(queryString, cb) { var restaurants = this.restaurants; var results = queryString ? restaurants.filter(this.createStateFilter(queryString)) : restaurants; clearTimeout(this.timeout); this.timeout = setTimeout(() => { cb(results); }, 3000 * Math.random()); }, createStateFilter(queryString) { return (state) => { return (state.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0); }; }, handleSelect(item) { console.log(item); } }, mounted() { this.restaurants = this.loadAll(); } }; </script>

#### 输入长度限制 ####

![20200826110522223.png_pic_center][]  
maxlength 和 minlength 是原生属性，用来限制输入框的字符长度，其中字符长度是用 Javascript 的字符串长度统计的。对于类型为 text 或 textarea 的输入框，在使用 maxlength 属性限制最大输入长度的同时，可通过设置 show-word-limit 属性来展示字数统计。

<el-input type="text" placeholder="请输入内容" v-model="text" maxlength="10" show-word-limit >
    </el-input>
    <div style="margin: 20px 0;"></div>
    <el-input type="textarea" placeholder="请输入内容" v-model="textarea" maxlength="30" show-word-limit >
    </el-input>
    
    <script> export default { data() { return { text: '', textarea: '' } } } </script>

#### Input Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>type</td> 
   <td>类型</td> 
   <td>string</td> 
   <td>text，textarea 和其他 原生 input 的 type 值</td> 
   <td>text</td> 
  </tr> 
  <tr> 
   <td>value / v-model</td> 
   <td>绑定值</td> 
   <td>string / number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>maxlength</td> 
   <td>原生属性，最大输入长度</td> 
   <td>number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>minlength</td> 
   <td>原生属性，最小输入长度</td> 
   <td>number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>show-word-limit</td> 
   <td>是否显示输入字数统计，只在 type = “text” 或 type = “textarea” 时有效</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>placeholder</td> 
   <td>输入框占位文本</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>clearable</td> 
   <td>是否可清空</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>show-password</td> 
   <td>是否显示切换密码图标</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>size</td> 
   <td>输入框尺寸，只在 type!=“textarea” 时有效</td> 
   <td>string</td> 
   <td>medium / small / mini</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>prefix-icon</td> 
   <td>输入框头部图标</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>suffix-icon</td> 
   <td>输入框尾部图标</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>rows</td> 
   <td>输入框行数，只对 type=“textarea” 有效</td> 
   <td>number</td> 
   <td>—</td> 
   <td>2</td> 
  </tr> 
  <tr> 
   <td>autosize</td> 
   <td>自适应内容高度，只对 type=“textarea” 有效，可传入对象，如，{ minRows: 2, maxRows: 6 }</td> 
   <td>boolean / object }</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>autocomplete</td> 
   <td>原生属性，自动补全</td> 
   <td>string</td> 
   <td>on, off</td> 
   <td>off</td> 
  </tr> 
  <tr> 
   <td>auto-complete</td> 
   <td>下个主版本弃用</td> 
   <td>string</td> 
   <td>on, off</td> 
   <td>off</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>readonly</td> 
   <td>原生属性，是否只读</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>max</td> 
   <td>原生属性，设置最大值</td> 
   <td>—</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>min</td> 
   <td>原生属性，设置最小值</td> 
   <td>—</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>step</td> 
   <td>原生属性，设置输入字段的合法数字间隔</td> 
   <td>—</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>resize</td> 
   <td>控制是否能被用户缩放</td> 
   <td>string</td> 
   <td>none, both, horizontal, vertical</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>autofocus</td> 
   <td>原生属性，自动获取焦点</td> 
   <td>boolean</td> 
   <td>true, false</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>form</td> 
   <td>原生属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>label</td> 
   <td>输入框关联的label文字</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>tabindex</td> 
   <td>输入框的tabindex</td> 
   <td>string</td> 
   <td>-</td> 
   <td>-</td> 
  </tr> 
  <tr> 
   <td>validate-event</td> 
   <td>输入时是否触发表单的校验</td> 
   <td>boolean</td> 
   <td>-</td> 
   <td>true</td> 
  </tr> 
 </tbody> 
</table>

#### Input Slots ####

<table> 
 <thead> 
  <tr> 
   <th>name</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>prefix</td> 
   <td>输入框头部内容，只对 type=“text” 有效</td> 
  </tr> 
  <tr> 
   <td>suffix</td> 
   <td>输入框尾部内容，只对 type=“text” 有效</td> 
  </tr> 
  <tr> 
   <td>prepend</td> 
   <td>输入框前置内容，只对 type=“text” 有效</td> 
  </tr> 
  <tr> 
   <td>append</td> 
   <td>输入框后置内容，只对 type=“text” 有效</td> 
  </tr> 
 </tbody> 
</table>

#### Input Events ####

<table> 
 <thead> 
  <tr> 
   <th>事件名称</th> 
   <th>说明</th> 
   <th>回调参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>blur</td> 
   <td>在 Input 失去焦点时触发</td> 
   <td>(event: Event)</td> 
  </tr> 
  <tr> 
   <td>focus</td> 
   <td>在 Input 获得焦点时触发</td> 
   <td>(event: Event)</td> 
  </tr> 
  <tr> 
   <td>change</td> 
   <td>仅在输入框失去焦点或用户按下回车时触发</td> 
   <td>(value: string</td> 
  </tr> 
  <tr> 
   <td>input</td> 
   <td>在 Input 值改变时触发</td> 
   <td>(value: string</td> 
  </tr> 
  <tr> 
   <td>clear</td> 
   <td>在点击由 clearable 属性生成的清空按钮时触发</td> 
   <td>—</td> 
  </tr> 
 </tbody> 
</table>

#### Input Methods ####

<table> 
 <thead> 
  <tr> 
   <th>方法名</th> 
   <th>说明</th> 
   <th>参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>focus</td> 
   <td>使 input 获取焦点</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>blur</td> 
   <td>使 input 失去焦点</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>select</td> 
   <td>选中 input 中的文字</td> 
   <td>—</td> 
  </tr> 
 </tbody> 
</table>

#### Autocomplete Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>placeholder</td> 
   <td>输入框占位文本</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>禁用</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>value-key</td> 
   <td>输入建议对象中用于显示的键名</td> 
   <td>string</td> 
   <td>—</td> 
   <td>value</td> 
  </tr> 
  <tr> 
   <td>value</td> 
   <td>必填值，输入绑定值</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>debounce</td> 
   <td>获取输入建议的去抖延时</td> 
   <td>number</td> 
   <td>—</td> 
   <td>300</td> 
  </tr> 
  <tr> 
   <td>placement</td> 
   <td>菜单弹出位置</td> 
   <td>string</td> 
   <td>top / top-start / top-end / bottom / bottom-start / bottom-end</td> 
   <td>bottom-start</td> 
  </tr> 
  <tr> 
   <td>fetch-suggestions</td> 
   <td>返回输入建议的方法，仅当你的输入建议数据 resolve 时，通过调用 callback(data:[]) 来返回它</td> 
   <td>Function(queryString, callback)</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>popper-class</td> 
   <td>Autocomplete</td> 
   <td>下拉列表的类名</td> 
   <td>string</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>trigger-on-focus</td> 
   <td>是否在输入框 focus 时显示建议列表</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>true</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>select-when-unmatched</td> 
   <td>在输入没有任何匹配建议的情况下，按下回车是否触发 select 事件</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>label</td> 
   <td>输入框关联的label文字</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>prefix-icon</td> 
   <td>输入框头部图标</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>suffix-icon</td> 
   <td>输入框尾部图标</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>hide-loading</td> 
   <td>是否隐藏远程加载时的加载图标</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>popper-append-to-body</td> 
   <td>是否将下拉列表插入至 body 元素。在下拉列表的定位出现问题时，可将该属性设置为 false</td> 
   <td>boolean</td> 
   <td>-</td> 
   <td>true</td> 
  </tr> 
  <tr> 
   <td>highlight-first-item</td> 
   <td>是否默认突出显示远程搜索建议中的第一项</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
 </tbody> 
</table>

#### Autocomplete Slots ####

<table> 
 <thead> 
  <tr> 
   <th>name</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>prefix</td> 
   <td>输入框头部内容</td> 
  </tr> 
  <tr> 
   <td>suffix</td> 
   <td>输入框尾部内容</td> 
  </tr> 
  <tr> 
   <td>prepend</td> 
   <td>输入框前置内容</td> 
  </tr> 
  <tr> 
   <td>append</td> 
   <td>输入框后置内容</td> 
  </tr> 
 </tbody> 
</table>

#### Autocomplete Scoped Slot ####

<table> 
 <thead> 
  <tr> 
   <th>name</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>—</td> 
   <td>自定义输入建议，参数为 { item }</td> 
  </tr> 
 </tbody> 
</table>

#### Autocomplete Events ####

<table> 
 <thead> 
  <tr> 
   <th>事件名称</th> 
   <th>说明</th> 
   <th>回调参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>select</td> 
   <td>点击选中建议项时触发</td> 
   <td>选中建议项</td> 
  </tr> 
  <tr> 
   <td>change</td> 
   <td>在 Input 值改变时触发</td> 
   <td>(value: string</td> 
  </tr> 
 </tbody> 
</table>

#### Autocomplete Methods ####

<table> 
 <thead> 
  <tr> 
   <th>方法名</th> 
   <th>说明</th> 
   <th>参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>focus</td> 
   <td>使 input 获取焦点</td> 
   <td>-</td> 
  </tr> 
 </tbody> 
</table>

## 4、InputNumber 计数器 ##

仅允许输入标准的数字值，可定义范围。

#### 基础用法 ####

![20200826120058138.png_pic_center][]  
要使用它，只需要在el-input-number元素中使用v-model绑定变量即可，变量的初始值即为默认值。

<template>
      <el-input-number v-model="num" @change="handleChange" :min="1" :max="10" label="描述文字"></el-input-number>
    </template>
    <script> export default { data() { return { num: 1 }; }, methods: { handleChange(value) { console.log(value); } } }; </script>

#### 禁用状态 ####

![2020082613201486.png_pic_center][]  
disabled属性接受一个Boolean，设置为true即可禁用整个组件，如果你只需要控制数值在某一范围内，可以设置min属性和max属性，不设置min和max时，最小值为 0。

<template>
      <el-input-number v-model="num" :disabled="true"></el-input-number>
    </template>
    <script> export default { data() { return { num: 1 } } }; </script>

#### 步数 ####

允许定义递增递减的步数控制。  
![20200826132644462.png_pic_center][]  
设置step属性可以控制步长，接受一个Number。

<template>
      <el-input-number v-model="num" :step="2"></el-input-number>
    </template>
    <script> export default { data() { return { num: 5 } } }; </script>

#### 严格步数 ####

![2020082613313027.png_pic_center][]  
step-strictly属性接受一个Boolean。如果这个属性被设置为true，则只能输入步数的倍数。

<template>
      <el-input-number v-model="num" :step="2" step-strictly></el-input-number>
    </template>
    <script> export default { data() { return { num: 2 } } }; </script>

#### 精度 ####

![20200826133451668.png_pic_center][]  
设置 precision 属性可以控制数值精度，接收一个 Number。

<template>
      <el-input-number v-model="num" :precision="2" :step="0.1" :max="10"></el-input-number>
    </template>
    <script> export default { data() { return { num: 1 } } }; </script>

precision 的值必须是一个非负整数，并且不能小于 step 的小数位数。

#### 尺寸 ####

额外提供了 medium、small、mini 三种尺寸的数字输入框。  
![20200826134816189.png_pic_center][]

<template>
      <el-input-number v-model="num1"></el-input-number>
      <el-input-number size="medium" v-model="num2"></el-input-number>
      <el-input-number size="small" v-model="num3"></el-input-number>
      <el-input-number size="mini" v-model="num4"></el-input-number>
    </template>
    <script> export default { data() { return { num1: 1, num2: 1, num3: 1, num4: 1 } } }; </script>

#### 按钮位置 ####

![20200826135248942.png_pic_center][]  
设置 controls-position 属性可以控制按钮位置。

<template>
      <el-input-number v-model="num" controls-position="right" @change="handleChange" :min="1" :max="10"></el-input-number>
    </template>
    <script> export default { data() { return { num: 1 }; }, methods: { handleChange(value) { console.log(value); } } }; </script>

#### Attributes ####

<table> 
 <thead> 
  <tr> 
   <th>参数</th> 
   <th>说明</th> 
   <th>类型</th> 
   <th>可选值</th> 
   <th>默认值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>value / v-model</td> 
   <td>绑定值</td> 
   <td>number</td> 
   <td>—</td> 
   <td>0</td> 
  </tr> 
  <tr> 
   <td>min</td> 
   <td>设置计数器允许的最小值</td> 
   <td>number</td> 
   <td>—</td> 
   <td>-Infinity</td> 
  </tr> 
  <tr> 
   <td>max</td> 
   <td>设置计数器允许的最大值</td> 
   <td>number</td> 
   <td>—</td> 
   <td>Infinity</td> 
  </tr> 
  <tr> 
   <td>step</td> 
   <td>计数器步长</td> 
   <td>number</td> 
   <td>—</td> 
   <td>1</td> 
  </tr> 
  <tr> 
   <td>step-strictly</td> 
   <td>是否只能输入 step 的倍数</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>precision</td> 
   <td>数值精度</td> 
   <td>number</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>size</td> 
   <td>计数器尺寸</td> 
   <td>string</td> 
   <td>large, small</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>disabled</td> 
   <td>是否禁用计数器</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>false</td> 
  </tr> 
  <tr> 
   <td>controls</td> 
   <td>是否使用控制按钮</td> 
   <td>boolean</td> 
   <td>—</td> 
   <td>true</td> 
  </tr> 
  <tr> 
   <td>controls-position</td> 
   <td>控制按钮位置</td> 
   <td>string</td> 
   <td>right</td> 
   <td>-</td> 
  </tr> 
  <tr> 
   <td>name</td> 
   <td>原生属性</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>label</td> 
   <td>输入框关联的label文字</td> 
   <td>string</td> 
   <td>—</td> 
   <td>—</td> 
  </tr> 
  <tr> 
   <td>placeholder</td> 
   <td>输入框默认 placeholder</td> 
   <td>string</td> 
   <td>-</td> 
   <td>-</td> 
  </tr> 
 </tbody> 
</table>

#### Events ####

<table> 
 <thead> 
  <tr> 
   <th>事件名称</th> 
   <th>说明</th> 
   <th>回调参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>change</td> 
   <td>绑定值被改变时触发</td> 
   <td>currentValue, oldValue</td> 
  </tr> 
  <tr> 
   <td>blur</td> 
   <td>在组件 Input 失去焦点时触发</td> 
   <td>(event: Event)</td> 
  </tr> 
  <tr> 
   <td>focus</td> 
   <td>在组件 Input 获得焦点时触发</td> 
   <td>(event: Event)</td> 
  </tr> 
 </tbody> 
</table>

#### Methods ####

<table> 
 <thead> 
  <tr> 
   <th>方法名</th> 
   <th>说明</th> 
   <th>参数</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>focus</td> 
   <td>使 input 获取焦点</td> 
   <td>-</td> 
  </tr> 
  <tr> 
   <td>select</td> 
   <td>选中 input 中的文字</td> 
   <td>—</td> 
  </tr> 
 </tbody> 
</table>

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