Update doc for waterfall (#412)

diff --git a/docs/docs/components/waterfall.md b/docs/docs/components/waterfall.md
index 0c04ac8..93fe2ba 100644
--- a/docs/docs/components/waterfall.md
+++ b/docs/docs/components/waterfall.md
@@ -1,5 +1,9 @@
 # <waterfall>
 
+::: danger
+`<waterfall>` is only supported on Android and iOS, and is not supported on web.
+:::
+
 ## Summary
 
 A component providing waterfall layout over list component.
diff --git a/docs/zh/docs/components/waterfall.md b/docs/zh/docs/components/waterfall.md
index 1f2e587..374aa92 100644
--- a/docs/zh/docs/components/waterfall.md
+++ b/docs/zh/docs/components/waterfall.md
@@ -1,5 +1,9 @@
 # &lt;waterfall&gt;
 
+::: danger
+`<waterfall>` 只支持 Android 和 iOS,不支持 Web
+:::
+
 ## 简介
 
 `<waterfall>` 组件是提供瀑布流布局的核心组件。瀑布流,又称瀑布流式布局是比较流行的一种页面布局,视觉表现为参差不齐的多栏布局。随着页面滚动条向下滚动,这种布局还可以不断加载数据块并附加至当前尾部。