Spring Animation
Spring animation follows a physics model. Stiffness, damping, mass, and starting speed control how it moves.
stiffness / damping / massA real example
A dragged card moves a little past its slot, then settles back into place.
Main parts
- 01Trigger
- 02Property change
- 03Timing model
- 04Reduced-motion result
Use it when
Use it for gesture-led motion that can be stopped and should keep the user’s speed.
Do not use it when
Never add too much bounce to common controls or sensitive tasks.
Name used in code
stiffness / damping / mass 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 Spring Animation to make the visual experience clear and easy to use. User context: A dragged card moves a little past its slot, then settles back into place. Design concept to apply: Spring Animation. Why it fits: Use it for gesture-led motion that can be stopped and should keep the user’s speed. Do not use it when: Never add too much bounce to common controls or sensitive tasks. 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): No single official standard controls the whole term. Its meaning may change across teams, platforms, or frameworks. 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 Spring Animation. Definition: Spring animation follows a physics model. Stiffness, damping, mass, and starting speed control how it moves. 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.