diff --git a/en/application-dev/reference/apis/js-apis-webgl.md b/en/application-dev/reference/apis/js-apis-webgl.md
index 412f8e6649b11eda0db4fa37b8c75e59a1e6bad1..785b49c7236a6b65d30299478c3da1959bb290f2 100644
--- a/en/application-dev/reference/apis/js-apis-webgl.md
+++ b/en/application-dev/reference/apis/js-apis-webgl.md
@@ -13,7 +13,8 @@ This module provides WebGL APIs that correspond to the OpenGL ES 2.0 feature set
 Create a **<canvas\>** component in the HML file. The following is an example:
 
 
-```
+```html
+<!--xxx.hml-->
 <div class="container">
     <canvas ref="canvas1" style="width : 400px; height : 200px; background-color : lightyellow;"></canvas>
     <button class="btn-button" onclick="BtnDraw2D">BtnDraw2D</button>