# Showcase

The flagship XWUIOverlayBlockUI demo. It walks through a scoped "Saving..." card overlay, the spinner size scale, spinner-only versus message-only variants, `setBlocked` / `setMessage` programmatic control, and a briefly triggered fullscreen block.

Scoped overlays use `fullScreen: false` so they stay confined to their host card; the fullscreen example is opt-in and clears itself automatically so the rest of the page stays usable.