[Guide 中的此页](https://developers.weixin.qq.com/miniprogram/en/dev/framework/view/interactive-animation.html) 的 "implementation of solution"小节中有一段：

> Developer's code can only run at the logic layer (Webview), but the solution requires that the code run at the view layer (App Service) instead, as shown below:

Logic layer (Webview) 和 View layer(App Service) 的标注反了。`AppService` 属逻辑层，`Webview` 属视图层。