This is cool from a programming perspective but it is poor UX. I believe everyone on HN knows this but the problem area are my clients. They run across stuff like this and think it looks cool/fun. Instead of listening to reason they demand stuff like this and end up with bad websites because all I can do it advise them but then make what they want.

Please stop spreading bad UX, leave page flipping to actual pages/paper.

Can't wait to see CSS Shaders land, then we can do this and correctly deform the HTML to make it look like it is on the "paper" (instead of being clipped to the paper). Still, with the curves they use it looks pretty good as is.

It's nice to see the web platform is capable of effects like this and I think the "usability" complaints in other comments are lame. You could use this to hide controls underneath a UI (ala Maps on iOS), for example (though maybe if you're "zen of palm"ing it you'd rather minimize clicks and put buttons everywhere, your choice); it doesn't have to replace scrolling.

While this is (technically) interesting, I don't see it being useful at all on a computer. Page curls are good on devices that can somewhat mimic a page but it really just feels awkward with a mouse or trackpad.

When done well, a skeuomorph helps a user to feel comfortable with an interface. Slight textures in digital interfaces help them to feel tactile. Good skeuomorphs take cues from an analog world to help a user navigate a digital one. when done poorly, the skeuomorph forces the user to deal with an interface in an outdated way by blatantly ignoring the fact that the interaction is being done on a platform that is capable of handling new and improved interactions.

This "page turn" skeuomorph really bothers me. If there is to be any animation at all, it should be to cover up load time, and the user should not have to click and drag with an extremely RSI-incuding stroke to get the page to turn. It feels like the page weighs 50 pounds. Digital interfaces are not material. They are supposed to be frictionless. They are supposed to take the work out of interaction.

I want to click on the right side of the page and have the animation quickly play so that I can get to my content. Focusing on the entire page flip takes me right out of the content.

I know that a book in real life takes some effort to hold, and some effort to flip a page, but designers should really reconsider designs that "look pretty" but keep that same effort around when they translate a book into a digital format.

I cringed when I first saw this kind of behavior in Flash. One or two people figured out how to program a page turner, released a tutorial and everyone was off to the races to create their own. Excellent programming exercise - extremely bothersome UX. Now we can see the entire thing play out again, in high def CSS!

First thought: this might actually make sense on tablets.

Totally doesn't work on my iPad.

Some time ago, Google released http://www.20thingsilearned.com and the source -> http://code.google.com/p/20thingsilearned/

I can't get the pager flip to go all the way over. I am using Windows 7/Chrome and clicking/dragging the bottom corner. I can't get the first page to go past the paperclip. I feel silly asking, but what am I doing wrong?

Is this supposed to do something on my iPad? Doesn't seem like the metaphor is really appropriate for non-tablet devices and this isnt working on my iPad.

Much smoother without the shadow. I can't believe we're there already, the worlds famous page flipper without flash :)

I don't get it, looks like a huge POS on my screen (10 inch netbook, see screenshot) https://picasaweb.google.com/lh/photo/ScOWQmywYCDt9sJu0nQaWc...

Great stuff Peter, thanks for sharing the latest at Crocodoc!

This doesn't seem to be working for me in the latest Firefox.

The comments on this article border on shameful. Props to crocodoc for building this. The demo is really good, and there is a lot of impressive attention to detail: try pulling a page up while a page is already flipped.

Screw the misplaced hate and self-righteous UX criticisms. This is a tech demo. Much like chrome experiments. Appreciate it for what it is.

I've seen this done a couple of different times, and it still makes zero sense from a usability standpoint. What is wrong with vertical scrolling? The entire gesture of clicking and dragging is awkward and makes zero sense when using a computer to read content.

Annnnnnnnnnnd if I don't your using page flip, how am I supposed to figure out how to use this page, or know if there's even additional pages I should see?

Interesting concept, but the user experience is seriously lacking.

Yeah, you should try that in IE 10. Probably looks much more different than Webkit and Mozilla.

Does not work on iPad

wow, this is super cool. Good work!

What if this is specifically intended to be a tablet-only user experience? Suddenly it makes sense.