const ThemeContext = React.createContext('light');const UserContext = React.createContext({name: 'Guest'});class App extends React.Component {
render() {
const {signedInUser, theme} = this.props;
return (
);
}}function Layout() {
return (
);}function Content() {
return (
{theme => (
{user => ( )}
)}
);}ReactDOM.render(, document.root);