更新CSS示例

pages/CSS/background/background-image.uvue

 <template>
-	<scroll-view style="flex:1">
+  <!-- #ifdef APP -->
+  <scroll-view style="flex:1">
+  <!-- #endif -->
 		<view>
 			<text>不支持背景图片，仅支持linear-gradient方法</text>
 				<view v-for="(direction) in directionData">
@@ -7,7 +9,9 @@
 				<view class="common" :style="{'background-image': 'linear-gradient('+direction+', red, yellow)'}"></view>
       </view>
 		</view>
-	</scroll-view>
+  <!-- #ifdef APP -->
+  </scroll-view>
+  <!-- #endif -->
 </template>
 
 <script>