自定义滑动到底部触发指令，elementUI实现分页下拉框-Toy模板网

这篇具有很好参考价值的文章主要介绍了自定义滑动到底部触发指令，elementUI实现分页下拉框。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

在 main.js 中添加

// 自定义滑动到底部指令
Vue.directive('selectLoadMore', {
  bind(el, binding) {
    // 获取element-ui定义好的scroll盒子
    const SELECTWRAP_DOM = el.querySelector('.el-select-dropdown .el-select-dropdown__wrap')
    SELECTWRAP_DOM.addEventListener('scroll', function () {
      if (this.scrollHeight - this.scrollTop < this.clientHeight + 1) {
        binding.value()
      }
    })
  },
})

使用

<el-select
  class="width-max"
  v-model="formValues.hpNumberArr"
  clearable
  filterable
  multiple
  reserve-keyword
  remote
  v-selectLoadMore="selectLoadMore"
  :remote-method="remoteMethod"
  placeholder="请选择表型匹配"
>
  <el-option
    v-for="user in phenotypeList"
    :key="user.id"
    :label="user.label"
    :value="user.value"
  >
  </el-option>
</el-select>

// 下拉加载更多
selectLoadMore() {
  this.phenotypeSearch.pageNum = this.phenotypeSearch.pageNum + 1
  if (this.phenotypeList.length >= this.phenotypeSearch.totalPage) return
  this.readAllUsers() // 请求接口
},
// 远程搜索
remoteMethod(query, callback) {
  this.loading = true
  this.phenotypeSearch.cn = query
  this.phenotypeSearch.pageNum = 1
  this.phenotypeList = []
  callback && callback()
  setTimeout(() => {
    this.loading = false
    this.readAllUsers() // 请求接口
  }, 200)
},
// 获取数据
readAllUsers() {
  let params = {
    pageNum: this.phenotypeSearch.pageNum,
    pageSize: this.phenotypeSearch.pageSize,
    cn: this.phenotypeSearch.cn,
  }
  findListByConditionFun(params).then((res) => {
    this.phenotypeSearch.totalPage = res.data.totalRecords
    this.phenotypeList = this.phenotypeList.concat(
      res.data.data.map((i) => {
        return {
          id: i.id,
          value: i.hpNumber,
          label: i.cn,
        }
      })
    )
  })
},