JSFiddle - React, Tailwind, and code Playground
by TJ VanToll
HTML
<div></div>
JavaScript
var div = document.querySelector( "div" );
div.webkitCreateShadowRoot().innerHTML = "<p>p</p>";
console.log( div.webkitShadowRoot.querySelectorAll( "p" ).length );
console.log( $( "p", div.webkitShadowRoot ).length );