Sidepage

Sidepage refers to a secondary page or panel that provides supplementary information or functionality alongside a primary page. It is designed to be accessed from the main content without replacing it, and it may exist as a distinct URL or as a panel within the same page. In many websites and applications, sidepages are reached through links in navigation, tabs, contextual actions, or as slide-in panels. A sidepage typically contains ancillary material such as help articles, legal notices, glossary terms, metadata, user settings, related content, or contextual explanations that support the user's task on the main page.

Differences from other UI elements include its potential for its own URL, enabling bookmarking and direct linking, which is not always the case with overlays or embedded panels. Sidepages can be traditional separate pages that users navigate to from the main content or dynamic panels that load alongside the current page while preserving the original context.

Implementation and design considerations involve choosing between a separate route or an in-page panel, and ensuring clarity in labeling and visual cues. Accessible keyboard navigation, predictable close or back actions, and focus management are important for usability. Performance considerations may include lazy loading and minimizing distractions when the sidepage is open. Responsiveness is essential, as sidepages should adapt to different screen sizes, potentially reorganizing content for smaller devices.

Usage considerations include keeping the main interface uncluttered, supporting progressive disclosure, and improving navigation to supplementary information. However, overuse can fragment context or confuse users if not clearly identified.

See also: modal, drawer, sidebar, overlay, help page, legal notice.