From http://kathack.com/js/kh.js.
Updated to not require jQuery. This means you can paste the entire implementation into any page without having to do script injection, which browsers intentionally make a little annoying.
Bookmarklet:
javascript:s=document.createElement('script');s.src='https://cdn.jsdelivr.net/gh/seansfkelley/kathack@v1/kh.js';document.body.appendChild(s);void(0);
Or in the browser console:
s=document.createElement('script');s.src='https://cdn.jsdelivr.net/gh/seansfkelley/kathack@v1/kh.js';document.body.appendChild(s);
Or just paste kh.js verbatim into the browser console.
Doing a "Release"
jsdelivr never refreshes a reference once fetched, so the main branch URL is forever poisoned. (Oops.) Instead, push a new tag and use @<tag> in the URL to fetch it.