Opened dropdown do not 'eat up' ESC keypresses when autoclosing from ESC.

[boltex]

Bug description:

First off, thanks for your great product. Here is the issue I found with the dropdowns:

Dropdown with auto close on ESC keypress does not stopPropagation nor stopImmediatePropagation for the keyDown event if escape was pressed with an opened dropdown.

I've looked at the autoclose.ts source file, it only does a preventDefault, which will not stop other listeners from triggering. (as stopImmediatePropagation would)

For example, a program may have setup window.addEventListener('keydown', (p_event) => {blablabla}); for doing something on escape, but not if a dropdown was opened. Which it should only close and prevent any other effects happening from this keypress.

This was the default behavior in the old https://angular-ui.github.io/bootstrap/ for angularJS

Is this a know issue? are there any workarounds?

[gpolychronis]

@boltex
The other program is under your control? ngbDropdown provides the method isOpen, which probably can be develop a workaround.