基于Vue+ElementPlus自定义带历史记录的搜索框组件

<template>
  <el-popover
    ref="popover"
    placement="bottom"
    width="400"
    trigger="manual"
    v-model:visible="isPopoverVisible"
    @show="onPopoverShow"
  >
    <template #reference>
      <el-input
        v-model="searchText"
        :placeholder="placeholder"
        @keyup.enter="onEnter"
        @input="onInput"
        @focus="onFocus"
        @blur="onBlur"
      >
        <template #suffix>
          <i v-if="searchText" class="el-input__icon el-icon-circle-close" @click="clearSearch"></i>
          <i v-else class="el-input__icon el-icon-search"></i>
        </template>
      </el-input>
    </template>
    <el-scrollbar height="240px">
      <div class="history-search-list">
        <div
          class="history-search-item"
          v-for="(item, index) in historyList"
          :key="index"
          @click="selectHistory(item)"
        >
          {{ item }}
        </div>
      </div>
    </el-scrollbar>
  </el-popover>
</template>
 
<script>
import { ref } from 'vue';
import { ElPopover, ElInput, ElScrollbar } from 'element-plus';
 
export default {
  components: {
    ElPopover,
    ElInput,
    ElScrollbar
  },
  props: {
    placeholder: {
      type: String,
      default: '请输入搜索内容'
    }
  },
  setup(props, { emit }) {
    const searchText = ref('');
    const isPopoverVisible = ref(false);
    const historyList = ref(JSON.parse(localStorage.getItem('historyList')) || []);
 
    const onEnter = () => {
      emit('update:searchText', searchText.value.trim());
      addToHistory();
      isPopoverVisible.value = false;
    };
 
    const onInput = () => {
      if (searchText.value.trim()) {
        isPopoverVisible.value = true;
      }
    };
 
    const onFocus = () => {
      isPopoverVisible.value = true;
    };
 
    const onBlur = () => {
      setTimeout(() => {
        isPopoverVisible.value = false;
      }, 200);
    };
 
    const clearSearch = () => {
      searchText.value = '';
      emit('update:searchText', '');
    };
 
    const selectHistory = (item) => {
      searchText.value = item;
      emit('update:searchText', item);
      isPopoverVisible.value = false;
    };
 
    const onPopoverShow = () => {
      if (historyList.value.includes(searchText.value.trim())) {
        historyList.value = historyList.value.filter(i