vue3 elementUI select 下拉加载更多

import {Directive, DirectiveBinding} from 'vue'

const loadMore: Directive = {beforeMount(el: any, binding: DirectiveBinding) {console.log(el)
        const selectDom = document.querySelector('.el-select-dropdown .el-select-dropdown__wrap')

        function loadMores(this: any) {const isBase = this.scrollHeight - this.scrollTop 

import {createApp} from 'vue'
import App from './App.vue'
import router from '/@/router'
import loadMore from './directive'

const app = createApp(App)
app.use(router).directive('loadMore', loadMore)