Build keyboard-friendly image dialogs with native dialog elements. Learn focus entry, Escape behavior, focus return, and backdrop styling, while clearly separating historical TopUp lightboxes from current examples.

Build a fast, accessible image lightbox using native HTML dialog, JavaScript showModal, and CSS backdrop. Includes working code and clear browser checks.

Connect a historical jQuery lightbox to a modern native dialog. Build a working example, then verify focus return, Escape handling, and backdrop styling with concrete checks.