ultra-design/es/layout/index.js

import LayoutComponent from './layout.js';
import Header from './header.js';
export { default as Header } from './header.js';
import Sider from './sider.js';
export { default as Sider } from './sider.js';
import Content from './content.js';
export { default as Content } from './content.js';
import Footer from './footer.js';
export { default as Footer } from './footer.js';

var Layout = LayoutComponent;
Layout.Header = Header;
Layout.Sider = Sider;
Layout.Content = Content;
Layout.Footer = Footer;

export { Layout as default };