According to HTML5 page visibility API, it is useful to develop power efficient web applications. Here is an excellent demo written by Sam Dutton. In the upcoming ZK 6.5.1, we implemented this API with onVisibilityChange event which is easy to use. Here is a very simple sample: if (!event.isHidden()) lbl.setValue(“Welcome back”); We can also use […]

The server push is a common practice to communicate between two browser windows. With 5.0.4, there is a better approach called the group-scoped event queue.