heartbeat-monitor/node_modules/dom-helpers/esm/activeElement.js
Matt Bruce bed1169443 Initial commit: Heartbeat Monitor dashboard
- Full-featured monitoring dashboard for local web apps
- Real-time status tracking with uptime percentages
- Visual sparklines for status history
- Add/Edit/Delete apps dynamically
- Categories and color coding
- Auto-refresh every 30 seconds
- API endpoints for apps and status management
2026-02-18 11:16:01 -06:00

25 lines
669 B
JavaScript

import ownerDocument from './ownerDocument';
/**
* Returns the actively focused element safely.
*
* @param doc the document to check
*/
export default function activeElement(doc) {
if (doc === void 0) {
doc = ownerDocument();
}
// Support: IE 9 only
// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
try {
var active = doc.activeElement; // IE11 returns a seemingly empty object in some cases when accessing
// document.activeElement from an <iframe>
if (!active || !active.nodeName) return null;
return active;
} catch (e) {
/* ie throws if no active element */
return doc.body;
}
}