The Building BlocksComponents are the smallest, discrete reusablechunks of the user interface.Containers are used to specify the arrangement andinteraction of components. Pages correspond to a unique URL. They contain one or more Screens and broker the interaction between them. Screens are a container for Regions and the expose an API for Pages to hide and show them. Regions are containers for components. They are normally styled as columns, rows, and provide basic structure for layout.