import ColumnsArea from './components/columns_area'; import NotificationsContainer from './containers/notifications_container'; import PureRenderMixin from 'react-addons-pure-render-mixin'; import LoadingBarContainer from './containers/loading_bar_container'; import HomeTimeline from '../home_timeline'; import MentionsTimeline from '../mentions_timeline'; import Compose from '../compose'; import MediaQuery from 'react-responsive'; import TabsBar from './components/tabs_bar'; const UI = React.createClass({ mixins: [PureRenderMixin], render () { const layoutBreakpoint = 1024; return (