webshim form validation polyfill in safari 9.1

polyfilled error bubble works with native input

HTML

<script src="https://afarkas.github.io/webshim/js-webshim/minified/polyfiller.js"></script>
<form onsubmit="alert('hi')" action="#">
  <input placeholder="native input works" required>
  <input type="submit">
</form>

JavaScript

webshim.polyfill('forms');