ant-design/components/date-picker/demo/external-panel.tsx

import React from 'react';
import { DownOutlined } from '@ant-design/icons';
import { DatePicker, Dropdown, Space } from 'antd';
import dayjs from 'dayjs';

const App: React.FC = () => {
  const [visible, setVisible] = React.useState(false);
  const [panelVisible, setPanelVisible] = React.useState(false);

  const [date, setDate] = React.useState(dayjs());

  return (
    <Dropdown
      arrow
      open={visible}
      trigger={['click']}
      destroyOnHidden
      onOpenChange={(open) => {
        setVisible(open);
        if (!open) {
          setPanelVisible(false);
        }
      }}
      menu={{
        items: [
          {
            key: 'today',
            label: 'Today',
            onClick() {
              setDate(dayjs());
              setVisible(false);
            },
          },
          {
            key: 'tomorrow',
            label: 'Tomorrow',
            onClick() {
              setDate(dayjs().add(1, 'day'));
              setVisible(false);
            },
          },
          {
            key: 'custom-date',
            label: (
              <div
                style={{ position: 'relative' }}
                onClick={(e) => {
                  e.stopPropagation();
                  setPanelVisible(true);
                }}
              >
                <div>Customize</div>
                <div
                  onClick={(e) => {
                    e.stopPropagation();
                  }}
                  style={{
                    height: 0,
                    width: 0,
                    overflow: 'hidden',
                    position: 'absolute',
                    top: 0,
                    insetInlineStart: 0,
                  }}
                >
                  <DatePicker
                    open={panelVisible}
                    onChange={(date) => {
                      setDate(date);
                      setVisible(false);
                      setPanelVisible(false);
                    }}
                  />
                </div>
              </div>
            ),
          },
        ],
      }}
    >
      <Space>
        <span>{date.format('YYYY-MM-DD')}</span>
        <DownOutlined />
      </Space>
    </Dropdown>
  );
};

export default App;