OnomaUI

wa motion

The motion for "boo! a sudden surprise".

わっ1 motionOfficial

Sample

Boo! A sudden surprise

Reveal a surprise

Grows from nothing to 136%, dips slightly, then settles.

Duration
0.3s
Repeats
No
Easing
ease-out
Animates
Scale · Opacity scale opacity
Show CSS
@keyframes onoma-wa {
  0% { transform: scale(0, 0); opacity: 0; }
  45% { transform: scale(1.36, 1.36); opacity: 1; animation-timing-function: ease-in-out; }
  72% { transform: scale(0.88, 0.88); opacity: 1; }
  100% { transform: scale(1, 1); opacity: 1; }
}

.onoma-wa {
  animation: onoma-wa 0.3s ease-out both;
}

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

Compare with similar motions

waBoo! A sudden surprise
puruShiver once
kaFlare up at once