遇到一个分页问题，需要带条件查询，望指教！

      <div class="pagination">
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[10, 20, 50, 100]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="count">
        </el-pagination>
      </div>

     handleCurrentChange (val) {
        this.pageNum = val
        // this.loadData()
      },
      handleSizeChange (val) {
        this.pageSize = val
        // this.loadData()
      },

这是分页代码，上面定义了个加载数据的事件，但是我需要通过条件查询数据的时候，怎么把事件加到里面呢？下面是一个事件shi'li

  queryByTag (formName) {
    let self = this
    this.queryForm['pageSize'] = this.pageSize
    this.queryForm['pageNum'] = this.pageNum
    self.$refs[formName].validate((valid) => {
      if (valid) {
        let url = Config.context + '/friendManager/getFriendInfoByTags'
        if (url) {
          axios({
            method: 'POST',
            url: url,
            data: {
              pageSize: this.queryForm['pageSize'],
              pageNum: this.queryForm['pageNum'],
              tags: self.queryForm2.id
            },
            timeout: Config.timeout
          })
            .then((response) => {
              self.loading = false
              let data = response.data
              self.page = data.page || 0
              self.count = data.count || 0
              self.tableData = data.list || []
            })
              .catch((error) => {
                self.$message.error('error')
                throw error
              })
        }
      } else {
        return false
      }
    })
  },