Widget: option-method should work as getter only when argument length is 1. Fixes #9601 - Widget: calling _setOption with undefined as 3rd argument makes it a getter

1 files changed, 2 insertions, 2 deletions

diff --git a/ui/jquery.ui.widget.js b/ui/jquery.ui.widget.js
index a46dcaf99..cc01f784f 100644
--- a/ui/jquery.ui.widget.js
+++ b/ui/jquery.ui.widget.js
@@ -321,12 +321,12 @@ $.Widget.prototype = {
 					curOption = curOption[ parts[ i ] ];
 				}
 				key = parts.pop();
-				if ( value === undefined ) {
+				if ( arguments.length === 1 ) {
 					return curOption[ key ] === undefined ? null : curOption[ key ];
 				}
 				curOption[ key ] = value;
 			} else {
-				if ( value === undefined ) {
+				if ( arguments.length === 1 ) {
 					return this.options[ key ] === undefined ? null : this.options[ key ];
 				}
 				options[ key ] = value;