React uses antd's upload component to implement the file form submission function (complete code)

import { Form, Button, Upload } from 'antd';
import { UploadOutlined } from '@ant-design/icons';
  
  const normFile = (e) => {
    console.log('Upload event:', e);
    if (Array.isArray(e)) {
      return e;
    }
    return e && e.fileList;
  };
  const Demo = () => {
    const onFinish = (values) => {
      console.log('Received values ​​of form: ', values);
    };
  
    return (
      <Form
        name="validate_other"
        onFinish={onFinish}
        initialValues={{
          'input-number': 3,
          'checkbox-group': ['A', 'B'],
          rate: 3.5,
        }}
      >
        <Form.Item
          name="upload"
          label="Upload"
          valuePropName="fileList"
          getValueFromEvent={normFile}
        >
          <Upload name="logo" action="/upload.do" listType="picture">
            <Button icon={<UploadOutlined />}>Click to upload</Button>
          </Upload>
        </Form.Item>
      </Form>
    );
  };
  
  ReactDOM.render(<Demo />, mountNode);

fetch(url, {

        //fetch request method: 'POST',

        body: formData,

})

 axios({ //axios
        method: 'post',
        url: url,
        data: formData,
    })
    .then(function (response) {
        console.log(response);
    })
    .catch(function (error) {
        console.log(error);
    });

import { Form, Button, Upload } from 'antd';
import { UploadOutlined } from '@ant-design/icons';
  
  const normFile = (e) => {
    console.log('Upload event:', e);
    if (Array.isArray(e)) {
      return e;
    }
    return e && e.fileList;
  };
  const beforeUpload = ({fileList}) => {
      return false;
  }
  const Demo = () => {
    const onFinish = (values) => {
      console.log('Received values ​​of form: ', values);
    };
  
    return (
      <Form
        name="validate_other"
        onFinish={onFinish}
        initialValues={{
          'input-number': 3,
          'checkbox-group': ['A', 'B'],
          rate: 3.5,
        }}
      >
        <Form.Item
          name="upload"
          label="Upload"
          valuePropName="fileList"
          getValueFromEvent={normFile}
        >
          <Upload name="logo"  
            beforeUpload={beforeUpload}
          >
            <Button icon={<UploadOutlined />}>Click to upload</Button>
          </Upload>
        </Form.Item>
      </Form>
    );
  };
  
  ReactDOM.render(<Demo />, mountNode);