React implements paging effect

import React, { useState, useEffect } from 'react'
import { Pagination } from 'antd';
import './loading.scss'
import Unit from '../hml'
const App = () => {
    // Set the page number const [num, setNum] = useState(1)
    // Obtained data carrier const [data, setData] = useState([])
    //Just used the mount method, secondary acquisition is not easy to useuseEffect(() => {
        Unit.getApi2('/home/mediareports', {
            //Data page page_number: num,
            // How much data per page page_size: 10
        }, {}).then((res) => {
            //Get data setData(res.data.data)
        })
    }, [num])
    const add = (e) => {
        // Each click turns forward one page setNum(e)
    }
    return (
        <>
            <ul>
                {/* map generates data */}
                {
                    data.map((item,index)=>{
                        return <a href={item.jump_url} key={index}><br />
                            {
                                item.main_title
                            }
                        </a>
                            
                    })
                }
            </ul>
            {/* Although the problem here is solved, I don't know why upload e can get the current clicked index instead of the element, but I think it should be related to total*/}
            <Pagination defaultCurrent={num} total={500} onChange={(e)=>add(e)}/>
        </>
    )
}
export default App

// antd has no style, the following code can solve this problem @import '~antd/dist/antd.css';

import axios from 'axios';
const Unit = {
    async getApi(ajaxCfg){
        let data = await axios.get(ajaxCfg.url,{params:ajaxCfg.cfg},
        {
            headers: ajaxCfg.headers
        })
        return data;
    },
    async getApi2(url,cfg,headers){
        let data = await axios.get(url,{params:cfg},
        {
            headers: headers
        })
        return data;
    },
    async postApi(url,cfg,headers){
        let fd = new FormData();
        for(let key in cfg){
            fd.append(key, cfg[key]);
        }
        let data = await axios.post(url,fd,
        {
            headers: headers
        })
        return data;
    },
    async putApi(url,cfg,headers){
        // import qs from 'qs';
        // let data = await axios.put(url,qs.stringify(cfg),{
        // headers: {
        // 'Content-Type':'application/x-www-form-urlencoded',
        // }
        // })
        // return data;
    },
    async requestApi(cfg,headers,file){
       let fd = new FormData();
       fd.append('param', JSON.stringify(cfg));
       if(file){
           // Upload proof if(file.length){
               for(let i=0,len=file.length;i<len;i++){
                   fd.append('files', file[i]);
               }
           }else {
               // Single upload for(let key in file){
                   fd.append(key, file[key]);
               }
           }
       }
       let data = await axios.post('/batch',fd,
       {
           headers: headers
       })
       return data;
   }
}
export default Unit;

const { createProxyMiddleware } = require('http-proxy-middleware');
module.exports = function (app) {
  app.use(
    // Set the path '/home', createProxyMiddleware({
      target: 'https://home-api.pinduoduo.com',
      changeOrigin: true,
    })
  );
};