React Third Party - Component to render container for third party rendered HTML markup

react-component-for-external-markup.jsx

/**
 - This is undocumented behaviour, and works as of React 16.x
 - Any HTML rendered within this <div /> will not be wiped by React
 - For example, an advert provider can output markup to this container without React removing on re-render
*/

function ReactThirdParty() {
  return (
    <div
      dangerouslySetInnerHTML={{ __html: '' }}
      suppressHydrationWarning
    />
   );
}

Reference: reactjs/rfcs#46 (comment)