vue3.0自定义搜索 带历史数据

<template>
  <div class="search">
    <div class="searchinput">
      <input
        placeholder="请输入搜索关健字（譬如：表名、表注释、字段名......）"
        class="s-input"
        v-model="searchChild"
        @change="searchChange"
        @keyup="actionkeyboard"
        @keyup.enter="enterkey"
        @focus="getAction"
        @blur="leave"
      />
      <CloseCircleOutlined v-if='searchChild!==""&&searchChild!==undefined' @mousedown='closeinput' class='closeicon'/>
    </div>
    <div class="history" v-if="visible">
      <ul class="dataList-top" >
        <li
          v-for="(item, index) in historylist"
          :key="index"
          @mousedown="searchkey(item)"
        >
        <a   >
          <div  class="hint">{{ item }}</div>
        </a>
        </li>
      </ul>
    </div>
  </div>
</template>
<script>
import { ref, watch } from "vue";
export default {
  name: "searchhistory",
  props: {
    searchvalue: String || undefined,
    list: Array,
  },
  emits: ["update:searchvalue"],
  setup(props, { emit }) {
    const searchChild = ref();
    const visible = ref(false);
    const historylist = ref([]);
    const updateSearch = () => {
      emit("update:searchvalue", searchChild.value);
    };
    const searchChange = (e) => {
      searchChild.value = e.target.value;
      updateSearch();
    };
    const enterkey = (e) => {
      visible.value = false;
      emit("enterkeys");
    };
    const getAction = (e) => {
      visible.value = true;
      historylist.value = props.list;
    };
    const leave = (e) => {
      visible.value = false;
    };
    const actionkeyboard = (e) => {
      if (e.code === "Backspace") {
        if (searchChild.value === "") {
          updateSearch();
          emit("enterkeys");
        }
      }
    };
    const searchkey = (e) => {
      searchChild.value = e;
      visible.value = false;
      updateSearch()
      emit("enterkeys");
    };
    const closeinput = (e) => {
      searchChild.value = '';
      visible.value = false;
      updateSearch()
      emit("enterkeys");
    };
    watch(
      () => props.list,
      (newVal) => {
        historylist.value = newVal || [];
      }
    );
    return {
      searchChild,
      historylist,
      searchChange,
      enterkey,
      getAction,
      visible,
      leave,
      actionkeyboard,
      searchkey,
      closeinput
    };
  },
};
</script>
<style lang="less" scoped>
.search {
  display: flex;
  flex-direction: column;
  width: 700px;
  position: relative;
}
.searchinput {
  width: 100%;
 position: relative;
}
.s-input {
  width: 100%;
  height: 32px;
  padding: 4px;
  background-color: #fff;
  border: 1px solid #d9d9d9;
}
.s-input:focus :hover {
  border: solid 1px #1890ff !important;
}
.history {
  width: 100%;
  background: white;
  position: absolute;
  z-index: 1000;
  top: 40px;
  left: 0;
}
.hint {
  font-size: 12px;
  list-style: none;
  padding-left: 10px;
  font-size: 14px;
  padding-top: 5px;
  padding-bottom: 5px;
}
.closeicon{
     display: none;
    position: absolute;
    right:6px;
    top:8px;
}
.dataList-top{
    cursor: pointer;
}
.searchinput:hover .closeicon{
    position: absolute;
    right:6px;
    top:8px;
  		  display: block;
}
</style>
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  <div class="search-item">

       <SearchHistory   v-model:searchvalue="parms.keyword" :list="searchReverseList" @enterkeys='enterkeys'></SearchHistory>
      <a-button class='btn-search' type="primary" @click="search()">搜索</a-button>
    </div>
   const enterkeys= (e)=>{
      search()
    }
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