diff --git a/README.md b/README.md
index 536cd50..4b8de52 100644
--- a/README.md
+++ b/README.md
@@ -160,7 +160,7 @@ import "your-element"
 
 <details/>
  <summary>
-  
+  Why?
  </summary>
  
 背景 1:【前端的历史】