I'm well aware of the technique of using URL fragments to track state on an AJAX powered webpage, but lately I've noticed a lot of sites that are doing something similar but without fragments.
The picture viewer in the latest version of Facebook for example operates this way. The left and right navigation buttons are simple links with no fragments that when clicked change the browsers URL without doing a full page load.
Another example is GitHub's repository browser, each of the files/folders is a simple link that changes the page state and browser URL without reloading or using page fragments.
Can anyone explain, or point me to an explanation of how this works? I've done some searching, but there is so much content on using fragments that I haven't been able to find anything.
See Question&Answers more detail:
os 与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
