HTML5: tablet drawing

Does HTML5 have a good way of letting the user draw using a tablet stylus? By good, I mean mainly: is it usable? does it respond as quickly as a native app (if the browser im开发者_如何转开发plementation is good)?

In other words: Is it possible to clone an iPad notepad app in HTML5 in Safari on iPad?

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It won't respond quickly as a native app, but it'll respond pretty quickly. To find out for sure, make a really simple prototype and test it out!