Deprecate focused property

[platosha]

The focused state should not end up in public API.

Instead (document || shadowRoot).activeElement standard DOM API should be used to find focused element. Focus change notification triggers standard focus events.

Include #23

[jouni]

Does this mean that the [focused] state attribute is also removed? I suppose we need to rely on the :focus pseudo-class instead then, right?

[platosha]

Nope. The attribute should be kept for styling purposes.

:focus pseudo-class is unreliable for host styling. Obviously, it wouldn’t match the host when the actual focused element is in shadow DOM.

[jouni]

Ah, of course – I didn’t actually think about this too much :D