diff --git a/docs/api/l7history.en.md b/docs/api/l7history.en.md
index c403f0678d..0d6c27fbe2 100644
--- a/docs/api/l7history.en.md
+++ b/docs/api/l7history.en.md
@@ -3,4 +3,4 @@ title: 1.x history
 order: 9
 ---
 
-`markdown:docs/api/l7history.zh.md`
\ No newline at end of file
+`markdown:docs/api/l7history.zh.md`
diff --git a/docs/api/polygon_layer/mask.zh.md b/docs/api/polygon_layer/mask.zh.md
index 09c2df5c85..90e283f82f 100644
--- a/docs/api/polygon_layer/mask.zh.md
+++ b/docs/api/polygon_layer/mask.zh.md
@@ -9,8 +9,7 @@ order: 2
 
 ```javascript
 import { MaskLayer } from '@antv/l7';
-let layer = new MaskLayer()
-  .source(data);
+let layer = new MaskLayer().source(data);
 
 scene.addLayer(layer);
 ```
@@ -27,7 +26,7 @@ layer.shape('fill');
 
 设置颜色值
 
-### size 
+### size
 
 maskLayer 无 size 不需要设置 size
 
@@ -37,7 +36,7 @@ maskLayer 无 size 不需要设置 size
 
 ```javascript
 style({
-  opacity: 0.5
+  opacity: 0.5,
 });
 ```
 
@@ -69,10 +68,8 @@ const scene = new Scene({
 const layer = new RasterLayer({ mask: true });
 ```
 
-
 [在线案例](../../../examples/raster/basic#dem)
 
 <img width="60%" style="display: block;margin: 0 auto;" alt="面图层填充图" src="https://gw.alipayobjects.com/mdn/rms_816329/afts/img/A*jhWWS6dhKhYAAAAAAAAAAAAAARQnAQ">
 
-
 `markdown:docs/common/layer/base.md`
diff --git a/docs/api/scene.en.md b/docs/api/scene.en.md
index 3d13a9e7c2..7b18bc4603 100644
--- a/docs/api/scene.en.md
+++ b/docs/api/scene.en.md
@@ -3,4 +3,4 @@ title: Scene
 order: 1
 ---
 
-`markdown:docs/api/scene.zh.md`
\ No newline at end of file
+`markdown:docs/api/scene.zh.md`
diff --git a/examples/raster/basic/demo/dem.js b/examples/raster/basic/demo/dem.js
index f9f4caf7f5..50c70fbd42 100644
--- a/examples/raster/basic/demo/dem.js
+++ b/examples/raster/basic/demo/dem.js
@@ -13,11 +13,11 @@ const scene = new Scene({
 });
 scene.on('loaded', () => {
   fetch(
-    'https://gw.alipayobjects.com/os/basement_prod/d2e0e930-fd44-4fca-8872-c1037b0fee7b.json',
+    'https://gw.alipayobjects.com/os/basement_prod/d2e0e930-fd44-4fca-8872-c1037b0fee7b.json'
   )
-    .then((res) => res.json())
-    .then((data) => {
-      let layer = new MaskLayer({})
+    .then(res => res.json())
+    .then(data => {
+      const layer = new MaskLayer({})
         .source(data);
 
       scene.addLayer(layer);