ant-design/components/menu/demo/sider-current.md

order	title
2	[{zh-CN 只展开当前父级菜单} {en-US Open current submenu only}]

zh-CN

点击菜单，收起其他展开的所有菜单，保持菜单聚焦简洁。

该用法要求 antd@2.0+

en-US

Click the menu and you will see that all the other menus gets collapsed to keep the entire menu compact.

This demo is for antd@2.0+.

import { Menu, Icon } from 'antd';
const SubMenu = Menu.SubMenu;

const Sider = React.createClass({
  getInitialState() {
    return {
      current: '1',
      openKeys: [],
    };
  },
  handleClick(e) {
    console.log('Clicked: ', e);
    this.setState({ current: e.key });
  },
  onOpenChange(openKeys) {
    const state = this.state;
    const latestOpenKey = openKeys.find(key => !(state.openKeys.indexOf(key) > -1));
    const latestCloseKey = state.openKeys.find(key => !(openKeys.indexOf(key) > -1));

    let nextOpenKeys = [];
    if (latestOpenKey) {
      nextOpenKeys = this.getAncestorKeys(latestOpenKey).concat(latestOpenKey);
    }
    if (latestCloseKey) {
      nextOpenKeys = this.getAncestorKeys(latestCloseKey);
    }
    this.setState({ openKeys: nextOpenKeys });
  },
  getAncestorKeys(key) {
    const map = {
      sub3: ['sub2'],
    };
    return map[key] || [];
  },
  render() {
    return (
      <Menu
        mode="inline"
        openKeys={this.state.openKeys}
        selectedKeys={[this.state.current]}
        style={{ width: 240 }}
        onOpenChange={this.onOpenChange}
        onClick={this.handleClick}
      >
        <SubMenu key="sub1" title={<span><Icon type="mail" /><span>Navigation One</span></span>}>
          <Menu.Item key="1">Option 1</Menu.Item>
          <Menu.Item key="2">Option 2</Menu.Item>
          <Menu.Item key="3">Option 3</Menu.Item>
          <Menu.Item key="4">Option 4</Menu.Item>
        </SubMenu>
        <SubMenu key="sub2" title={<span><Icon type="appstore" /><span>Navigation Two</span></span>}>
          <Menu.Item key="5">Option 5</Menu.Item>
          <Menu.Item key="6">Option 6</Menu.Item>
          <SubMenu key="sub3" title="Submenu">
            <Menu.Item key="7">Option 7</Menu.Item>
            <Menu.Item key="8">Option 8</Menu.Item>
          </SubMenu>
        </SubMenu>
        <SubMenu key="sub4" title={<span><Icon type="setting" /><span>Navigation Three</span></span>}>
          <Menu.Item key="9">Option 9</Menu.Item>
          <Menu.Item key="10">Option 10</Menu.Item>
          <Menu.Item key="11">Option 11</Menu.Item>
          <Menu.Item key="12">Option 12</Menu.Item>
        </SubMenu>
      </Menu>
    );
  },
});
ReactDOM.render(<Sider />, mountNode);