draggable: defaults should be set to 'false' if disabled, not null (fixes #3878)

diff --git a/ui/ui.draggable.js b/ui/ui.draggable.js
index da483bfaaf23959c3b8a1b9fa08197f3a4a55c56..e9b9142b632cb1eba6e2a7aa74d08858cd8bfd78 100644 (file)
--- a/ui/ui.draggable.js
+++ b/ui/ui.draggable.js
@@ -405,14 +405,14 @@ $.extend($.ui.draggable, {
                containment: false,
                cssNamespace: "ui",
                cursor: "default",
-               cursorAt: null,
+               cursorAt: false,
                delay: 0,
                distance: 1,
                grid: false,
                handle: false,
                helper: "original",
                iframeFix: false,
-               opacity: null,
+               opacity: false,
                refreshPositions: false,
                revert: false,
                revertDuration: 500,
@@ -424,7 +424,7 @@ $.extend($.ui.draggable, {
                snapMode: "both",
                snapTolerance: 20,
                stack: false,
-               zIndex: null
+               zIndex: false
        }
 });