ElementUI Form：Input 输入框

效果图

el-input.vue （Input 输入框）页面效果图
项目里el-input.vue代码

<script>
export default {
  name: 'el_input',
  data() {
    return {
      input: '',
      input1: '',
      input2: '',
      input3: '',
      input4: '',
      textarea: '',
      textarea1: '',
      textarea2: '',
      input5: '',
      input6: '',
      input7: '',
      select: '',
      restaurants: [],
      state1: '',
      state2: '',
      restaurants2: [],
      state: '',
      state3: '',
      timeout:  null,
      text: '',
      textarea3: ''
    }
  },
  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" }
      ];
    },
    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);
    },
    handleIconClick(ev) {
      console.log(ev);
    }
  },
  mounted() {
    this.restaurants = this.loadAll();
  },
}

</script>

<!--
  https://element.eleme.cn/#/zh-CN/component/input#input-shu-ru-kuang
-->

<template>
  <div class="el_input_root">
    <h2>Input 输入框</h2>
    <h5>通过鼠标或键盘输入字符</h5>
    <p>
      Input 为受控组件，它总会显示 Vue 绑定值。<br/>

      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。<br/>

      不支持 v-model 修饰符
    </p>
    <div style="width: 300px;">
      <h3>一、基础用法</h3>
      <el-input v-model="input" placeholder="请输入内容"></el-input>

      <h3>二、禁用状态</h3>
      <h5>通过 disabled 属性指定是否禁用 input 组件</h5>
      <el-input
          placeholder="请输入内容"
          v-model="input"
          :disabled="true">
      </el-input>

      <h3>三、可清空</h3>
      <h5>使用clearable属性即可得到一个可清空的输入框</h5>
      <el-input
          placeholder="请输入内容"
          v-model="input"
          clearable>
      </el-input>

      <h3>四、密码框</h3>
      <h5>使用show-password属性即可得到一个可切换显示隐藏的密码框</h5>
      <el-input placeholder="请输入密码" v-model="input" show-password></el-input>
    </div>

    <div style="width: 600px;">
      <h3>五、带 icon 的输入框</h3>
      <h5>带有图标标记输入类型</h5>
      <h5>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。</h5>
      <el-row :gutter="4" type="flex" justify="left" align="middle">
        <el-col :span="3">
          属性方式:
        </el-col>
        <el-col :span="8">
          <el-input
              placeholder="请选择日期"
              suffix-icon="el-icon-date"
              v-model="input1">
          </el-input>
        </el-col>
        <el-col :span="8">
          <el-input
              placeholder="请输入内容"
              prefix-icon="el-icon-search"
              v-model="input2">
          </el-input>
        </el-col>


      </el-row>

      <el-row :gutter="4" type="flex" justify="left" align="middle">
        <el-col :span="3">
          slot 方式:
        </el-col>
        <el-col :span="8">
          <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-col>
        <el-col :span="8">
          <el-input
              placeholder="请输入内容"
              v-model="input4">
            <i slot="prefix" class="el-input__icon el-icon-search"></i>
          </el-input>
        </el-col>
      </el-row>

      <h3>六、文本域</h3>
      <h5>用于输入多行文本信息，通过将 type 属性的值指定为 textarea。</h5>
      <h5>文本域高度可通过 rows 属性控制</h5>
      <div style="width: 300px">
        <el-input
            type="textarea"
            :rows="2"
            placeholder="请输入内容"
            v-model="textarea">
        </el-input>
      </div>

      <h3>七、可自适应文本高度的文本域</h3>
      <h5>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。</h5>
      <div style="width: 400px">
        <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>
      </div>

      <h3>八、复合型输入框</h3>
      <h5>可前置或后置元素，一般为标签或按钮</h5>
      <h5>可通过 slot 来指定在 input 中前置或者后置内容。</h5>
      <div>
        <el-input placeholder="请输入内容" v-model="input5">
          <template slot="prepend">Http://</template>
        </el-input>
      </div>
      <div style="margin-top: 15px;">
        <el-input placeholder="请输入内容" v-model="input6">
          <template slot="append">.com</template>
        </el-input>
      </div>
      <div style="margin-top: 15px;">
        <el-input placeholder="请输入内容" v-model="input7" 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>
    </div>
    <div style="width: 1000px">
      <h3>九、尺寸</h3>
      <h5>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 medium、small 和 mini 三种尺寸。</h5>
      <el-row :gutter="4">
        <el-col :span="6">
          <el-input
              placeholder="请输入内容"
              suffix-icon="el-icon-date"
              v-model="input1">
          </el-input>
        </el-col>
        <el-col :span="6">
          <el-input
              size="medium"
              placeholder="请输入内容"
              suffix-icon="el-icon-date"
              v-model="input2">
          </el-input>
        </el-col>
        <el-col :span="6">
          <el-input
              size="small"
              placeholder="请输入内容"
              suffix-icon="el-icon-date"
              v-model="input3">
          </el-input>
        </el-col>
        <el-col :span="6">
          <el-input
              size="mini"
              placeholder="请输入内容"
              suffix-icon="el-icon-date"
              v-model="input4">
          </el-input>
        </el-col>
      </el-row>

      <h3>十、带输入建议</h3>
      <h5>根据输入内容提供对应的输入建议</h5>
      <p>
        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。
      </p>
      <el-row>
        <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>
    </div>

    <h3>十一、自定义模板</h3>
    <h5>可自定义输入建议的显示</h5>
    <p>
      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。
    </p>
    <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>

    <h3>十二、远程搜索</h3>
    <h5>从服务端搜索数据</h5>
    <el-autocomplete
        v-model="state"
        :fetch-suggestions="querySearchAsync"
        placeholder="请输入内容"
        @select="handleSelect"
    ></el-autocomplete>

    <h3>十三、输入长度限制</h3>
    <h5>
      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。
    </h5>
    <div style="width: 600px">
      <el-row :gutter="4">
        <el-col :span="12">
          <el-input
              type="text"
              placeholder="请输入内容"
              v-model="text"
              maxlength="10"
              show-word-limit
          >
          </el-input>
        </el-col>
      </el-row>


      <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>
    </div>
  </div>
</template>

<style>
.el_input_root {
  margin-left: 300px;
  margin-right: 300px;
  text-align: left;
}

.el-select .el-input {
  width: 130px;
}

.input-with-select .el-input-group__prepend {
  background-color: #fff;
}

.sub-title{
  font-size: 14px;
  text-align: left;
}

.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>