html - How do I do awesome refreshless page changes like GitHub do?

Question

GitHub seems to be doing something incredible: animated page changes without breaking state. The address bar changes, but the page doesn't refresh and I get animated to the next view.

For example, hit this URL: as3logback/ then hit this URL: as3logback/lib

How in the devil are they doing it!?! It's so cool! Are they using some sort of frame or something serverside?

Answer 1

They have a detailed blog entry up on how it works (HTML5 History API) here: https://github.com/blog/760-the-tree-slider