Sticky Position
CSS sticky positioning starts like normal relative positioning. As the page scrolls, the box can stay at a set edge, but only inside its containing block.
Another example
A long table sits inside one scroll area with top: 0 on its header. The header stays at the top only while its table is in view. Missing a set edge or using the wrong scroll container can stop sticky positioning from working.
Main parts
- 01scroll container
- 02non-auto inset
- 03containing-block boundary
Use it when
Use this term when an item in normal layout should stay visible inside its nearest scroll area.
Do not use it when
Do not use sticky items that cover content, stack in unclear ways, or take most of a small screen.
Name used in code
position: sticky; inset-block-start: 0 Before you ship
Check content order, shared design values, component consistency, contrast, zoom, and layout changes by screen size. Verify every theme, language, and state. If there is motion, offer an equal reduced-motion experience.
Outcome: Use or define Sticky Position to make the visual experience clear and easy to use. User context: A long table sits inside one scroll area with top: 0 on its header. The header stays at the top only while its table is in view. Missing a set edge or using the wrong scroll container can stop sticky positioning from working. Design concept to apply: Sticky Position. Why it fits: Use this term when an item in normal layout should stay visible inside its nearest scroll area. Do not use it when: Do not use sticky items that cover content, stack in unclear ways, or take most of a small screen. Design requirements: Set the content order, shared design values, and reusable components. Define how the layout changes by screen size and state. Keep useful design choices separate from decoration. Inclusion and resilience: Check contrast, zoom, languages, themes, and reduced motion when needed. Do not use color or effects as the only way to show meaning. Acceptance criteria: The design stays clear on phones and desktops, at zoom, in every theme, and in all supported languages. Interactive states stay clear and consistent. Evidence and limits (evidence boundary): A formal document may still be a draft, release candidate, or final version. Check its status and browser or platform support. Unknowns to confirm: Brand limits, amount of content, supported themes and languages, target devices, and design-system rules.
Check this request
Review the current use of Sticky Position. Definition: CSS sticky positioning starts like normal relative positioning. As the page scrolls, the box can stay at a set edge, but only inside its containing block. Release checks: Check content order, shared design values, component consistency, contrast, zoom, and layout changes by screen size. Verify every theme, language, and state. If there is motion, offer an equal reduced-motion experience. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.