Transition
A transition moves between two known visual states over a set time.
transitionA real example
On hover, a button’s background and size move smoothly from their resting state.
Main parts
- 01Trigger
- 02Property change
- 03Timing model
- 04Reduced-motion result
Use it when
Use a transition for a simple state change when you know its start and end.
Do not use it when
Never use transition-all. It may animate layout or accessibility changes that shouldn't move.
Name used in code
transition 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 Transition to make the visual experience clear and easy to use. User context: On hover, a button’s background and size move smoothly from their resting state. Design concept to apply: Transition. Why it fits: Use a transition for a simple state change when you know its start and end. Do not use it when: Never use transition-all. It may animate layout or accessibility changes that shouldn't move. 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 Transition. Definition: A transition moves between two known visual states over a set time. 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.