Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....Background 属性确定页面是前景页面还是背景页面。 检索页面信息编程示例...Checks if current page is a background page if page . getBackground...