ant-design/components/dropdown/demo/dropdown-button.tsx

import { DownOutlined, UserOutlined } from '@ant-design/icons';
import type { MenuProps } from 'antd';
import { Button, Dropdown, Menu, message, Space, Tooltip } from 'antd';
import React from 'react';

const handleButtonClick = (e: React.MouseEvent<HTMLButtonElement>) => {
  message.info('Click on left button.');
  console.log('click left button', e);
};

const handleMenuClick: MenuProps['onClick'] = e => {
  message.info('Click on menu item.');
  console.log('click', e);
};

const menu = (
  <Menu
    onClick={handleMenuClick}
    items={[
      {
        label: '1st menu item',
        key: '1',
        icon: <UserOutlined />,
      },
      {
        label: '2nd menu item',
        key: '2',
        icon: <UserOutlined />,
      },
      {
        label: '3rd menu item',
        key: '3',
        icon: <UserOutlined />,
      },
    ]}
  />
);

const App: React.FC = () => (
  <Space wrap>
    <Dropdown.Button onClick={handleButtonClick} overlay={menu}>
      Dropdown
    </Dropdown.Button>
    <Dropdown.Button overlay={menu} placement="bottom" icon={<UserOutlined />}>
      Dropdown
    </Dropdown.Button>
    <Dropdown.Button onClick={handleButtonClick} overlay={menu} disabled>
      Dropdown
    </Dropdown.Button>
    <Dropdown.Button
      overlay={menu}
      buttonsRender={([leftButton, rightButton]) => [
        <Tooltip title="tooltip" key="leftButton">
          {leftButton}
        </Tooltip>,
        React.cloneElement(rightButton as React.ReactElement<any, string>, { loading: true }),
      ]}
    >
      With Tooltip
    </Dropdown.Button>
    <Dropdown overlay={menu}>
      <Button>
        <Space>
          Button
          <DownOutlined />
        </Space>
      </Button>
    </Dropdown>
    <Dropdown.Button danger onClick={handleButtonClick} overlay={menu}>
      Danger
    </Dropdown.Button>
  </Space>
);

export default App;