AI CSS Animations

Bounce In Down

Falls from above, stretched by speed, squashes flat on landing, then hops twice on a shrinking arc. The origin sits at the bottom edge so the squash stays on the floor.

Also known as: drop in animation css, bounce in from top css, drop and bounce.

Drop

HTML

<div class="kfa-bounce-in-down">Drop</div>

CSS

.kfa-bounce-in-down {
  --c: var(--kfa-color, #3b82f6);
  font-size: var(--kfa-size, 16px);
  display: grid;
  place-items: center;
  width: 5.5em;
  height: 5.5em;
  border-radius: 1em;
  background: var(--c);
  color: #fff;
  font-family: system-ui, sans-serif;
  font-weight: 700;
  box-shadow: 0 0.6em 1.4em -0.6em color-mix(in srgb, var(--c) 70%, transparent);
  transform-origin: 50% 100%;
  animation: kfa-bounce-in-down-kf 1s both;
}
@keyframes kfa-bounce-in-down-kf {
  0% {
    opacity: 0;
    transform: translateY(-2.4em) scale(0.94, 1.1);
    animation-timing-function: cubic-bezier(0.55, 0, 1, 0.45);
  }
  40% {
    opacity: 1;
    transform: translateY(0) scale(1.14, 0.84);
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
  }
  58% {
    transform: translateY(-0.9em) scale(0.97, 1.04);
    animation-timing-function: cubic-bezier(0.55, 0, 1, 0.45);
  }
  74% {
    transform: translateY(0) scale(1.06, 0.94);
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
  }
  86% {
    transform: translateY(-0.2em) scale(1);
    animation-timing-function: cubic-bezier(0.55, 0, 1, 0.45);
  }
  100% { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .kfa-bounce-in-down, .kfa-bounce-in-down *, .kfa-bounce-in-down::before, .kfa-bounce-in-down::after, .kfa-bounce-in-down *::before, .kfa-bounce-in-down *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

Customizing this snippet

  • Color: set --kfa-color on the element or a parent. Currently previewing #3b82f6.
  • Base size: set --kfa-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
  • Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
  • Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

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