UI Terms visual dictionary

Animations

Crossfade

A transition where one element fades out as another fades in, the two briefly overlapping in opacity.

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Crossfades are the gentlest transition. They imply equivalence — the new state replaces the old without direction, hierarchy, or motion. Useful for tab switches, image carousels, and any lateral move where push or slide would feel too forceful. Short durations (150-250ms) keep them from feeling sluggish.

Also called

fade transitiondissolve

When to use

  • Lateral transitions between peer views (tabs, carousels)
  • Theme or color-mode switches
  • Loading-state to loaded-state where you want a soft transition

When not to use

  • Hierarchical navigation (use push or modal)
  • Transitions where preserving an element's identity matters (use shared element or container transform)

Source

Cinematic vernacular; standard in animation toolkits and CSS via opacity transitions.