sticky-and-fixed-elements

Sticky and fixed positioning differ by scope: fixed positioning removes elements from the document flow for global UI access, while sticky positioning keeps section-scoped headers visible only within their parent container during scroll. Use fixed for global navigation and sticky for table headers.

Keep a navigation header visible by applying position: fixed for consistent global access, or position: sticky if it only needs to persist within a specific section. Compensate for fixed elements by adding padding to the page body to prevent content overlap.

Use position: fixed for bottom toolbars on mobile to keep them permanently accessible, ensuring you apply responsive padding and safe-area considerations. Use sticky positioning when the toolbar context is limited to a specific scrolling section rather than the entire viewport.

Manage z-index stacking conflicts by using explicit z-index tokens to ensure predictable layering across persistent UI elements. This prevents visual clutter and stacking overlap when multiple fixed headers and sticky toolbars render simultaneously on the same page.

A fixed header overlaps page content because fixed positioning removes the element from the normal document flow. Apply appropriate padding to the page body to compensate for the fixed header height and push the primary content back into the visible viewport area.