I like how the author focuses on being able to link to content within an HTML application. The use of the window.location.hash property to support linking to c

I like how the author focuses on being able to link to content within an HTML application. The use of the window.location.hash property to support linking to content within apps has been hit and miss in the last few years with web apps. Many times the back and forward buttons don't work, bookmarking a particular hash doesn't go back to that content on refresh, or there is no hash change for content at all.