overscroll-behavior
`overscroll-behavior` controls what happens when a scrolling area reaches its edge. It can stop the scroll from continuing into a parent area and can change the edge effect.
Another example
A map tool has a long list of layers. `overscroll-behavior: contain` lets people scroll that list without moving the page behind it. The panel keeps its normal edge feedback. The main page scrolls normally after the pointer leaves the panel.
Main parts
- 01Nested scroller
- 02Scroll boundary
- 03Chaining policy
Use it when
Use `contain` at a planned inner scrolling edge, such as a map, drawer, or code editor.
Do not use it when
Do not turn off overscroll for the whole site. It may remove normal navigation and device feedback without fixing the layout.
Name used in code
overscroll-behavior: auto|contain|none 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 overscroll-behavior to make the visual experience clear and easy to use. User context: A map tool has a long list of layers. `overscroll-behavior: contain` lets people scroll that list without moving the page behind it. The panel keeps its normal edge feedback. The main page scrolls normally after the pointer leaves the panel. Design concept to apply: overscroll-behavior. Why it fits: Use `contain` at a planned inner scrolling edge, such as a map, drawer, or code editor. Do not use it when: Do not turn off overscroll for the whole site. It may remove normal navigation and device feedback without fixing the layout. 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 overscroll-behavior. Definition: `overscroll-behavior` controls what happens when a scrolling area reaches its edge. It can stop the scroll from continuing into a parent area and can change the edge effect. 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.