vue-treeselect 实现懒加载 + 远程模糊搜索 支持多选，可悬浮提示选择项所有层级 已封装为组件

<template>
  <treeselect
    v-model="value"
    :multiple="true"
    :options="options"
    :load-options="loadOptions"
    :default-expand-level="Infinity"
    :searchable="true"
    :append-to-body="true"
    :clearable="false"
    :max-height="400"
    placeholder="Select your flavor"
    noOptionsText="No options available"
    noResultsText="No results found"
    :noChildrenText="No sub-departments"
    :limit="5"
    :limitText="count => `and ${count} more`"
  />
</template>
 
<script>
export default {
  data: () => ({
    value: null,
    options: [],
    // Assume `getSubDepartments` is a function that fetches sub-departments
    getSubDepartments: id => Promise.resolve([]), // replace with actual API call
  }),
  methods: {
    loadOptions({ action, parentNode, callback }) {
      if (action === 'LOAD_CHILDREN_OPTIONS') {
        this.getSubDepartments(parentNode.id).then(children => {
          callback({ children });
        });
      }
    },
  },
};
</script>

这个代码实例展示了如何在Vue中使用vue-treeselect组件实现多选懒加载模糊搜索功能，同时支持悬浮提示显示所有层级选项。其中loadOptions方法负责在需要时懒加载子选项，getSubDepartments是一个示例API调用函数，应该替换为实际用于获取子部门数据的函数。