[CommanderData]

Tested and looks like compatibility is broken with offsets , changes to btn sizes, label margins and looks like custom style for select form elements has changed or removed.

I think its best not to use this in any projects until its out of beta.

[sotojuan]

You mean out of alpha? Even more reason not to use it!

[deecewan]

Eh. I regularly use EcmaScript stage 0 proposals in smaller projects. If it's not getting a heap of users, why not experiment?

[sotojuan]

Fair point, though I assume GP meant real products/work.