我正在运行npm start时出现以下错误：C：/ Users /....../ angular-ngrx-material / src / app / app.component.ts（52,31）中的错误：属性'themeClass ''OverlayContainer'类型不存在。

根据最近的Angular Material更改日志，请访问https://github.com/angular/material2/blob/master/CHANGELOG.md#200-beta11-carapace-parapet-2017-09-21

overlay：既然Overlay是cdk的一部分而不是Angular Material的一部分，那么themeClass属性已被删除。要为叠加添加类以进行主题化，您可以这样做

overlayContainer.getContainerElement().classList.add('my-theme-class');

你能帮我解决这个问题。我想替换this.overlayContainer.themeClass = theme; 在app.component.ts中使用上面的代码将解决问题，但我担心它可能会破坏应用程序中的其他内容。提前致谢。

I am currently getting the following error when running npm start: ERROR in C:/Users/....../angular-ngrx-material/src/app/app.component.ts (52,31): Property 'themeClass' does not exist on type 'OverlayContainer'.

As per the recent Angular Material changelog available here https://github.com/angular/material2/blob/master/CHANGELOG.md#200-beta11-carapace-parapet-2017-09-21

overlay: Now that the Overlay is part of the cdk rather than Angular Material directly, the themeClass property has been removed. To add a class to the overlay for theming, you can do

overlayContainer.getContainerElement().classList.add('my-theme-class');

Can you please help me with this issue. I think replacing this.overlayContainer.themeClass = theme; inside the app.component.ts with the above code will resolve the issue but I am afraid it may break other things in the App. Thanks in advance.