- This stackoverflow answer has a good back story on this: (TLDR, it's not standard... yet) http://stackoverflow.com/a/3434388/1339100
but it is in this HTML 5.1 draft: http://www.w3.org/html/wg/drafts/html/master/browsers.html#n...
- It's slower than document.getElementById, somehow: http://jsperf.com/implicit-dom-element-variables