元件dropdown.vue程式碼如下：

<template>
  <div class="vue-dropdown default-theme">
    <div class="search-module clearfix">
      <input class="search-text"
      @keyup='search($event)' :placeholder="placeholder" v-model="inputText" />
      <span class="glyphicon glyphicon-search search-icon"></span>
    </div>
    <ul class="list-module" v-show="isShowData">
      <li v-for ="(item,index) in datalist" @click="appClick(item)" :key="index">
        <span class="list-item-text">{{item}}</span>
      </li>
    </ul>
    <div class="tip__nodata" v-show="isShowNone">{{nodatatext}}</div>
  </div>
</template>
 
<script>
  export default {
    data() {
      return {
        datalist: [],
        inputText: "",
        isShowData: false,
        isShowNone: false
      }
    },
    props: {
      'itemlist': Array,
      'placeholder': String,
      'nodatatext': String
    },
    methods: {
      appClick: function(data) {
        this.$emit('item-click', data)
        this.inputText = data
        this.isShowData = false
      },
      search: function(e) {
        let searchvalue = e.currentTarget.value
        this.$emit('inputValue', searchvalue)
        if (this.datalist.length === 0) {
          this.isShowNone = true
          this.isShowData = false
        } else {
          this.isShowData = true
          this.isShowNone = false
        }
      },
      inputBlur() {
        this.isShowData = false
        this.isShowNone = false
        this.inputText = ""
      }
    },
    mounted () {
      this.datalist = this.itemlist
    }
  }
</script>
 
<style lang="scss" scoped>
  .vue-dropdown.default-theme {
    position: absolute;
    left:15%;
    width: 70%;
    margin: 0 auto;
    margin-top: 1em;
    padding: 1em;
    z-index:10;
    box-shadow: 0px 0px 10px #ccc;
    &._self-show {
      display: block!important;
    }
 
    .search-module {
      position: relative;
      .search-text {
        width: 100%;
        height: 30px;
        padding-right: 2em;
        padding-left:0.5em;
        border-radius: 0.5em;
        box-shadow: none;
        border: 1px solid #ccc;
 
        &:focus {
          border-color: #2198f2;
        }
      }
 
      .search-icon {
        position: absolute;
        top: 24%;
        right: 0.5em;
        color: #aaa;
      }
    }
 
    .list-module {
      max-height: 200px;
      overflow-y: auto;
      li {
        &._self-hide {
          display: none;
        }
        margin-top: 0.5em;
        padding: 0.5em;
        &:hover {
          cursor:pointer;
          color: #fff;
          background: #00a0e9;
        }
      }
    }
  }
  .tip__nodata {
    font-size: 12px;
    margin-top: 1em;
  }
</style>
 

元件使用：

<drop-down @inputValue="getInputValue" @item-click="itemClick" :itemlist="itemlist" :placeholder="placeholder" :nodatatext="nodatatext"></drop-down>

<script>
import dropDown from "@/components/dropdown"
export default {
data() {
    return {
      itemlist: [],
      placeholder: "搜尋",
      nodatatext: "暫無資料",
      selectValue: ""
    }
  },
  methods: {
    itemClick(data) {
      this.selectValue= data
    },
    getInputValue(searchvalue) {
      console.log(searchvalue)
      // 請求獲取篩選列表
      
    }
  },
  components: {
    dropDown
  }
}
</script>