OnomaUI

kero motion

The motion for "as if nothing happened".

けろっ1 motionOfficial

Sample

As if nothing happened

Instant recovery

Grows from nothing to 110%, dips slightly, then settles.

Duration
0.36s
Repeats
No
Easing
ease-out
Animates
Scale · Opacity scale opacity
Show CSS
@keyframes onoma-kero {
  0% { transform: scale(0, 0); opacity: 0; }
  45% { transform: scale(1.1, 1.1); opacity: 1; animation-timing-function: ease-in-out; }
  72% { transform: scale(0.97, 0.97); opacity: 1; }
  100% { transform: scale(1, 1); opacity: 1; }
}

.onoma-kero {
  animation: onoma-kero 0.36s ease-out both;
}

/* Reduced motion: only fade in */
@keyframes onoma-kero-fade { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .onoma-kero { animation: onoma-kero-fade 0.2s ease-out both; }
}

Compare with similar motions

keroAs if nothing happened
pikaFlash for a moment
ponPop in