Why are they hacks? HTML provides a set of well-defined, programmatically accessible, renderable elements which support events. You are free to manipulative the

Why are they hacks? HTML provides a set of well-defined, programmatically accessible, renderable elements which support events. You are free to manipulative them as you see fit. If you want to paint your own controls, you can do that too. It's really not so different from native UI definitions I've used. Due to the different behavior of browsers for handling "native" HTML elements (select lists, radio buttons, etc), I think it's a good thing advanced and opinionated constructs like grids are not built in.