md-menu-item of type="button" should click on keyboard selection about material-web HOT 2 OPEN

I think the culprit is the menu item controller's keydown handler, which stops the space/enter keydowns from making a click.

@e111077 may know a bit more about that controller, but that'd be a good place to start debugging.

from material-web.

The initial reasoning is that a click will cause the menu to close / open submenu via click selection. This would then likely trigger the close twice and cause some visual jank.

Additionally, by marking it as defaultPrevented == true, we prevent the menu's typeahead functionality from triggering on "space" as the first button pressed.

We might be able to add some likely non-trivial logic / rewrite here to solve this. Perhaps another marker other that preventDefault, but that may degrade the DX of "just call preventDefault on any event to opt out of menu events"

from material-web.