vue3封装一个通用的数据字典选择。自定义组件支持v-model双向绑定值，支持change事件，支持传递提示语placeholder

代码如下：

<template>
    <el-select
      v-model="innerValue"
      @change="handleSelectChange"
      class="select-dic"
      size="default"
      :placeholder="placeholder"
      clearable
    >
      <el-option
        v-for="item in dicDatas"
        :key="item.dictValue"
        :value="item.dictValue"
        :label="item.dictLabel"
      />
    </el-select>
  </template>
  <script setup lang="ts">
  import { ref, watch, onMounted } from 'vue';
  // import type { PropType } from 'vue';
  import request from '/@/utils/requestTools';
  // 定义组件props类型
  interface DictDataItem {
    dictValue: string;
    dictLabel: string;
  }
  const props = defineProps({
    modelValue: {
      type: String,
      default: ''
    },
    dictType: {
      type: String,
      required: true
    },
    placeholder: {
      type: String,
      default: '请选择类型'
    }
  });
  const emit = defineEmits<{
    (e: 'update:modelValue', value: string): void;
    (e: 'change', value: string): void;
  }>();
  // 响应式状态
  const innerValue = ref(props.modelValue);
  const dicDatas = ref<DictDataItem[]>([]);
  // 初始化加载字典数据
  const loadDictData = async () => {
    try {
      const res:any = await request.get('/watertap/api/SysDictData/getSysDictDataByType', {
        dictType: props.dictType
      });
      dicDatas.value = res.data || [];
    } catch (error) {
      console.error('加载字典数据失败:', error);
      // 这里可以添加错误处理逻辑
    }
  };
  // 处理选择变化
  const handleSelectChange = (value: string) => {
    emit('update:modelValue', value);
    emit('change', value);
  };
  // 监听外部modelValue变化
  watch(
    () => props.modelValue,
    (newVal) => {
      innerValue.value = newVal;
    }
  );
  // 生命周期钩子
  onMounted(loadDictData);
  </script>
  <style scoped lang="scss">
  .select-dic {
    width: 100%;
    :deep(.el-input__inner) {
      padding: 0 15px;
    }
  }
  </style>