import '@polymer/polymer' ; import { theme } from '../styles/theme' ; import './flex-layout-attr' ; const documentContainer = document . createElement ( 'template' ) ; documentContainer . innerHTML = `<dom-module id="shared-styles">
  <template>
    <style>
      ${ theme }
    </style>
  </template>
</dom-module>` ; document . head . appendChild ( documentContainer . content ) ;