Toggling display of child components with an "if" attribute doesn't work if I change the expression to parent.component either - evaluating a component attribut

Toggling display of child components with an "if" attribute doesn't work if I change the expression to parent.component either - evaluating a component attribute declared in a parent in the context of the child is pretty surprising, if that's what happens. It seems like using a value attribute on a <select> doesn't set the selected value, I had to manually set selected on the <option>s to get it to work, and updating the value from elsewhere doesn't seem to affect the selected option either way. Checkbox events are throwing "SyntaxError: function statement requires a name". Wrapping the display of the disabled value in () instead of [] throws "SyntaxError: missing formal parameter" on load. Updated gist showing these here: http://bl.ocks.org/insin/5e0bf04cf1f701c235ad http://bl.ocks.org/insin/5e0bf04cf1f701c235ad I don't see any docs on using forms - is support for form elements still a work in progress?