Oh yes, Harmony with html5-canvas
I’m just digging just a little bit into html5-canvas object. Then I found a project, that should convince any critics instantly about canvas: Harmony from Mr. Doob. It feels light, is at a performant level (at least on my computer) and got a decent style. Just have a look at the page-source of the website. Scripting galore! Have fun with it! Here is a good cheat sheet, that should make the first steps into canvas easy.