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

order	title
5	[{zh-CN 带下拉框的按钮} {en-US Button with dropdown menu}]

zh-CN

左边是按钮，右边是额外的相关功能菜单。可设置 icon 属性来修改右边的图标。

en-US

A button is on the left, and a related functional menu is on the right. You can set the icon property to modify the icon of right.

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

function handleButtonClick(e) {
  message.info('Click on left button.');
  console.log('click left button', e);
}

function handleMenuClick(e) {
  message.info('Click on menu item.');
  console.log('click', e);
}

const menu = (
  <Menu onClick={handleMenuClick}>
    <Menu.Item key="1" icon={<UserOutlined />}>
      1st menu item
    </Menu.Item>
    <Menu.Item key="2" icon={<UserOutlined />}>
      2nd menu item
    </Menu.Item>
    <Menu.Item key="3" icon={<UserOutlined />}>
      3rd menu item
    </Menu.Item>
  </Menu>
);

ReactDOM.render(
  <Space wrap>
    <Dropdown.Button onClick={handleButtonClick} overlay={menu}>
      Dropdown
    </Dropdown.Button>
    <Dropdown.Button overlay={menu} placement="bottomCenter" 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, { loading: true }),
      ]}
    >
      With Tooltip
    </Dropdown.Button>
    <Dropdown overlay={menu}>
      <Button>
        Button <DownOutlined />
      </Button>
    </Dropdown>
  </Space>,
  mountNode,
);