<!DOCTYPE html>
<script src="resources/polyfill.js"></script>

<p>When the AuthorShadowDOM does not have a Shadow DOM, the content won't be rendered.</p>
<form>
    <fieldset id="host" style="width: 100px; height: 30px; margin: 0; padding: 0; border: 0">
        <legend>legend</legend>
        <input type="text"></input>
    </fieldset>
    <input id="submit" type="submit" value="Submit">
</form>

<script>
if (window.internals)
    window.internals.settings.setAuthorShadowDOMForAnyElementEnabled(true);
var host = document.getElementById('host');
var shadowRoot = host.webkitCreateShadowRoot();
</script>