Shadow DOM CSS Cheat SheetAuthor's Note: This post was originally written in April 2014 and since then a lot has changed with Shadow DOM CSS. I've updated the post to reflect the current state of things as of March 2016. This guide is my attempt to track the progress of all the new CSS selectors which affect the Shadow DOM. I've written this from the perspective of someone who uses Polymer so in a few places I point out po
