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( function( factory ) {
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
define( [ "jquery", "./version" ], factory );
} else {
// Browser globals
factory( jQuery );
}
} ( function( $ ) {
return $.ui.safeActiveElement = function( document ) {
var activeElement;
// Support: IE 9 only
// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
try {
activeElement = document.activeElement;
} catch ( error ) {
activeElement = document.body;
}
// Support: IE 9 - 11 only
// IE may return null instead of an element
// Interestingly, this only seems to occur when NOT in an iframe
if ( !activeElement ) {
activeElement = document.body;
}
// Support: IE 11 only
// IE11 returns a seemingly empty object in some cases when accessing
// document.activeElement from an <iframe>
if ( !activeElement.nodeName ) {
activeElement = document.body;
}
return activeElement;
};
} ) );
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