Keyframes
Keyframes are named points in an animation. Each point sets property values for a chosen moment.
@keyframesA real example
A notification enters at 0%, stays in place at 70%, and leaves by 100%.
Main parts
- 01Trigger
- 02Property change
- 03Timing model
- 04Reduced-motion result
Use it when
Use keyframes for several stages or a loop that a simple transition can't make.
Do not use it when
Never control every frame by hand when simple interpolation can do the job.
Name used in code
@keyframes 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 Keyframes to make the visual experience clear and easy to use. User context: A notification enters at 0%, stays in place at 70%, and leaves by 100%. Design concept to apply: Keyframes. Why it fits: Use keyframes for several stages or a loop that a simple transition can't make. Do not use it when: Never control every frame by hand when simple interpolation can do the job. 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 Keyframes. Definition: Keyframes are named points in an animation. Each point sets property values for a chosen moment. 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.