@Mariano Guerra Fantastic. An explicit goal was to make something with CSS that looks as different as possible in each (current/recent) browser. So far you're winning "most cursed"
@Tak Tran Yes, there is one nasty limitation in WebKit ā it only gives you events for the fingers or the pen, not both at once, and it doesn't give you much info from each of them. So our Swift wrapper forwards full-fidelity, low latency pencil (at 240hz) and touch (at 120hz), with all the fanciness (tilt angle, barrel roll, pressure, etc) across to the JS context. We've been using this technique since back in Crosscut/Inkling, and I recently rewrote the project to be much simpler (a single Swift file). Hoping to pull it out into its own repo and share it with a little write up. We'll see. Either way, it's great for iPad prototyping, and I encourage everyone to play around with it!