Unlike many component-based GUI, ZK has no destroy or close method for components. Like W3C DOM, a component is removed from the browser as soon as it is detached from the page. It is shown as soon as it is attached to the page.

More precisely, once a component is detached from a page, it is no longer managed by ZK. If the application doesn't have any reference to it. The memory occupied by the component will be released by JVM's Garbage Collector.