ui/safe-blur.js

( function( factory ) {
	"use strict";

	if ( typeof define === "function" && define.amd ) {

		// AMD. Register as an anonymous module.
		define( [ "jquery", "./version" ], factory );
	} else {

		// Browser globals
		factory( jQuery );
	}
} )( function( $ ) {
"use strict";

return $.ui.safeBlur = function( element ) {

	// Support: IE9 - 10 only
	// If the <body> is blurred, IE will switch windows, see #9420
	if ( element && element.nodeName.toLowerCase() !== "body" ) {
		$( element ).trigger( "blur" );
	}
};

} );