3D Flip Loop: CSS Keyframe Animation

3D Flip Loop

Every couple of seconds the element flips a full turn around its vertical axis, fastest as it passes edge on, then lands flat and waits. perspective() in the transform gives it depth.

Also known as: 3d flip animation css, flip card loop, rotatey 360 infinite.

Flip

Color Base size 16px Dark background

HTML

<div class="kfa-flip-loop">Flip</div>

CSS

.kfa-flip-loop {
  --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);
  animation: kfa-flip-loop-turn 2.4s infinite;
}
@keyframes kfa-flip-loop-turn {
  0% { transform: perspective(16em) rotateY(0) scale(1); animation-timing-function: cubic-bezier(0.11, 0, 0.5, 0); }
  20% { transform: perspective(16em) rotateY(180deg) scale(1.08); animation-timing-function: cubic-bezier(0.5, 1, 0.89, 1); }
  40%, 100% { transform: perspective(16em) rotateY(360deg) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .kfa-flip-loop, .kfa-flip-loop *, .kfa-flip-loop::before, .kfa-flip-loop::after, .kfa-flip-loop *::before, .kfa-flip-loop *::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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