title: Custom attributes in React
body: <p>"If you pass properties to native HTML elements that do not exist in the HTML specification, React will not render them." - React docs.
  <a href="https://facebook.github.io/react/docs/jsx-gotchas.html#custom-html-attributes" rel="nofollow">https://facebook.github.io/react/docs/jsx-gotchas.html#custom-html-attributes</a></p>
  
  <p>Is there performance issues or why aren't custom attributes rendered in React?</p>