diff --git a/assets/index.less b/assets/index.less
index 2ac0cc8..eaa60f6 100644
--- a/assets/index.less
+++ b/assets/index.less
@@ -239,7 +239,7 @@
             pointer-events: auto;
           }
 
-          &::after {
+          &::before {
             content: "";
             position: absolute;
             left: 0;
diff --git a/docs/examples/stack.tsx b/docs/examples/stack.tsx
index 2467fe2..bd47720 100644
--- a/docs/examples/stack.tsx
+++ b/docs/examples/stack.tsx
@@ -15,7 +15,7 @@ const getConfig = () => ({
 });
 
 const Demo = () => {
-  const [{ open }, holder] = useNotification({ motion, stack: true });
+  const [{ open }, holder] = useNotification({ motion, stack: true, closable: true });
 
   return (
     <Context.Provider value={{ name: 'bamboo' }}>