X-web/src/utils/loadMore.js

// directives.js
import Vue from 'vue'

const loadmore = Vue.directive('loadmore', {
  bind (el, binding) {
    const scrollWrap = el.querySelector('.el-select-dropdown__wrap')
    scrollWrap.addEventListener('scroll', function () {
      // 解决浏览器缩放导致的 scrollTop 小数问题
      const isBottom =
        this.scrollHeight - Math.ceil(this.scrollTop) <= this.clientHeight + 1
      if (isBottom && this.scrollTop !== 0) {
        binding.value() // 触发加载函数
      }
    })
  }
})

export default { loadmore }