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/*
Copyright (©) 2003-2025 Teus Benschop.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// Return the active element of a page, regardless of shadow root or iframe window.
// @returns {HTMLElement}
function getActiveElement (element = document.activeElement)
{
const shadowRoot = element.shadowRoot
const contentDocument = element.contentDocument
if (shadowRoot && shadowRoot.activeElement) {
return getActiveElement(shadowRoot.activeElement)
}
if (contentDocument && contentDocument.activeElement) {
return getActiveElement(contentDocument.activeElement)
}
return element
}
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