fixing undefined originalEvent

apps/files/js/jquery-visibility.js

@@ -3,7 +3,7 @@
 
 	var prefix,
 		property,
-// In Opera, `'onfocusin' in document == true`, hence the extra `hasFocus` check to detect IE-like behavior
+		// In Opera, `'onfocusin' in document == true`, hence the extra `hasFocus` check to detect IE-like behavior
 		eventName = 'onfocusin' in document && 'hasFocus' in document ? 'focusin focusout' : 'focus blur',
 		prefixes = ['', 'moz', 'ms', 'o', 'webkit'],
 		$support = $.support,
@@ -19,12 +19,11 @@
 
 	$(/blur$/.test(eventName) ? window : document).on(eventName, function (event) {
 		var type = event.type,
-			originalEvent = event.originalEvent,
-			toElement = originalEvent.toElement;
-// If it’s a `{focusin,focusout}` event (IE), `fromElement` and `toElement` should both be `null` or `undefined`;
-// else, the page visibility hasn’t changed, but the user just clicked somewhere in the doc.
-// In IE9, we need to check the `relatedTarget` property instead.
-		if (!/^focus./.test(type) || (toElement == undefined && originalEvent.fromElement == undefined && originalEvent.relatedTarget == undefined)) {
+			originalEvent = event.originalEvent;
+		// If it’s a `{focusin,focusout}` event (IE), `fromElement` and `toElement` should both be `null` or `undefined`;
+		// else, the page visibility hasn’t changed, but the user just clicked somewhere in the doc.
+		// In IE9, we need to check the `relatedTarget` property instead.
+		if (!/^focus./.test(type) || originalEvent == undefined || (originalEvent.toElement == undefined && originalEvent.fromElement == undefined && originalEvent.relatedTarget == undefined)) {
 			$event.trigger((property && document[property] || /^(?:blur|focusout)$/.test(type) ? 'hide' : 'show') + '.visibility');
 		}
 	});