Advanced concepts for components include routing and navigation and component data as well as the event bus.
The following advanced concepts for components exist.
Asynchronous content creation
A UIComponent can implement the sap.ui.core.IAsyncContentCreation interface. This interface allows you to provide a Promise as the return value for the sap.ui.core.UIComponent#createContent function.
For more information, see Methods Controlling the Initial Instantiation.
Routing and navigation
UI components support the routing and navigation concept, see Initializing and Accessing a Routing Instance.
Extensibility and customizing
The extensibility and customizing concept allows you to extend and modify components in order to replace and extend the views and controllers as well as to modify the views. A customization can be performed, for example, on a custom application that extends a delivered standard application.
For more information, see Extending Apps
Component data
The JSON object ComponentData contains any initial values of parameters that can be used in the createComponent() method. Component data are already available for use in the createComponent() method, but not the parameters. The parameters are available in the onBefore, the onAfterRendering and the setter methods of the parameters.
Component data is provided from outside and can be configured as desired. Configuration data is static and defined in the component. To change or extend the configuration, the component needs to be extended and a new configuration has to be created and merged with the configuration in the parent component.
Event bus of the component
The local event bus belongs to the component and can be used by all children of this component. Once a component instance is destroyed, the listeners registered in the event bus are destroyed automatically. For more information, see API Reference for the getEventBus method of sap.ui.core.Component.