Fixed NPE in Slider (#9740)

Change-Id: I08c769cbe87c2bb8d94bb18d6685df0385d0eae8

diff --git a/client/src/com/vaadin/client/ui/VSlider.java b/client/src/com/vaadin/client/ui/VSlider.java
index 3fdd8f031317a36e8912bffedf5c7bd59d59895e..3951550dd2ce2db4eac3edc4c305eb62cf8e220b 100644 (file)
--- a/client/src/com/vaadin/client/ui/VSlider.java
+++ b/client/src/com/vaadin/client/ui/VSlider.java
@@ -195,6 +195,10 @@ public class VSlider extends SimpleFocusablePanel implements Field,
         // clear unnecessary opposite style attribute
         base.getStyle().clearProperty(oppositeStyleAttribute);
 
+        if (!getElement().hasParentElement()) {
+            return;
+        }
+
         final Element p = getElement().getParentElement().cast();
         if (p.getPropertyInt(domProperty) > 50) {
             if (isVertical()) {