Passing keyboard events down to child components

[Anatoli Babenia]

How to pass certain keypresses, like Up / Down and Page Up / Page Down to child components?

I am trying to understand how to fix this bug with Google Codelab component.

https://github.com/googlecodelabs/codelab-components/issues/46

Parent element holds focus, so child content window can not be scrolled. I tried

to mess with focus, but it doesn't fix all states where Up / Down is not used.

There is keybinds property

https://github.com/googlecodelabs/codelab-components/blob/master/google-codelab.html#L356

but I don't know what function/handler should I write to just pass the key.