45 lines
1014 B
JavaScript
Executable File
45 lines
1014 B
JavaScript
Executable File
( function( factory ) {
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"use strict";
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if ( typeof define === "function" && define.amd ) {
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// AMD. Register as an anonymous module.
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define( [ "jquery", "./version" ], factory );
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} else {
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// Browser globals
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factory( jQuery );
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}
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} )( function( $ ) {
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"use strict";
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return $.ui.safeActiveElement = function( document ) {
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var activeElement;
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// Support: IE 9 only
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// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
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try {
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activeElement = document.activeElement;
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} catch ( error ) {
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activeElement = document.body;
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}
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// Support: IE 9 - 11 only
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// IE may return null instead of an element
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// Interestingly, this only seems to occur when NOT in an iframe
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if ( !activeElement ) {
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activeElement = document.body;
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}
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// Support: IE 11 only
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// IE11 returns a seemingly empty object in some cases when accessing
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// document.activeElement from an <iframe>
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if ( !activeElement.nodeName ) {
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activeElement = document.body;
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}
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return activeElement;
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};
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} );
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