How to use ElementUI pagination component Pagination in Vue

<div class="pagination">
    <el-pagination
      background
      layout="total, sizes, prev, pager, next, jumper"
      :current-page="tablePage.pageNum"
      :page-size="tablePage.pageSize"
      :page-sizes="pageSizes"
      :total="tablePage.total"
      @size-change="handleSizeChange"
      @current-change="handlePageChange"
    />
</div>

data() {
    return {
      tablePage: {
        pageNum: 1, // Page number pageSize: 10, // Number of records per page total: 0 // Total number of records },
      pageSizes: [10, 20, 30]
    }
  },
  methods: {
    handlePageChange(currentPage) {
      this.tablePage.pageNum = currentPage
      // Refresh data here},
    handleSizeChange(pageSize) {
      this.tablePage.pageSize = pageSize
      // Refresh data here}
  }

// Get data getData() {
      let param = {
        pageNum: this.tablePage.pageNum,
        pageSize: this.tablePage.pageSize
      }
      // Request backend interface function getDataApi(param, { loading: true }).then(res => {
        //Background return data this.list = res.data.list
        this.tablePage.total = res.data.total
      })
    },

/**
     * Paging data processing * @param data [Array] Data to be paginated * @param num [Number] Current page * @param size [Number] Number of items to display per page */
    getList(data, num, size) {
      let list, total, start, end, isFirst, isLast
      total = data.length
      isFirst = total < size
      isLast = Math.ceil(total / size) === num
      start = (num - 1) * size
      end = isFirst || isLast ? start + (total % size) : start + size
      list = data.slice(start, end)
      list.forEach((item, index) => {
        item.seq = index + start
      })
      return list
    }
    /**
     * Paging data processing * @param data [Array] Data to be paginated * @param num [Number] Current page * @param size [Number] Number of items to display per page */
    getList(data, num, size) {
      let list, start, end
      start = (num - 1) * size
      end = start + size
      list = data.filter((item, index) => {
        return index >= start && index < end
      })
      list.forEach((item, index) => {
        item.seq = index + start
      })
      return list
}