Mern中分页项未正确显示

这个问题可能与CSS有关。可以尝试向分页组件的父级或父级的父级元素添加以下样式：

display: flex;
justify-content: center;

如果问题仍然存在，则检查分页组件是否正确地导入并使用。以下是一个使用React Bootstrap的示例分页组件：

import React, { useState, useEffect } from 'react';
import { Pagination } from 'react-bootstrap';

const ExamplePagination = ({ totalPages, handlePageChange }) => {
  const [activePage, setActivePage] = useState(1);

  useEffect(() => {
    handlePageChange(activePage);
  }, [activePage]);

  const handlePaginationClick = (page) => {
    setActivePage(page);
  };

  const renderPaginationItems = () => {
    const paginationItems = [];
    for (let page = 1; page <= totalPages; page++) {
      paginationItems.push(
        <Pagination.Item
          key={page}
          active={page === activePage}
          onClick={() => handlePaginationClick(page)}
        >
          {page}
        </Pagination.Item>
      );
    }
    return paginationItems;
  };

  return (
    <Pagination>
      <Pagination.First
        disabled={activePage === 1}
        onClick={() => handlePaginationClick(1)}
      />
      <Pagination.Prev
        disabled={activePage === 1}
        onClick={() => handlePaginationClick(activePage - 1)}
      />
      {renderPaginationItems()}
      <Pagination.Next
        disabled={activePage === totalPages}
        onClick={() => handlePaginationClick(activePage + 1)}
      />
      <Pagination.Last
        disabled={activePage === totalPages}
        onClick={() => handlePaginationClick(totalPages)}
      />
    </Pagination>
  );
};

export default ExamplePagination;