Modern CSS Animations

Keyframe animations for cards, icons, loaders and headings - drop a class on an element and it comes alive.

1Multi-Layer Spinner

A loading indicator made of three counter-rotating rings in the theme colours. Class: fx-multi-layer-spinner

Preparing your release

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <div class="text-center">
    <div class="fx-multi-layer-spinner" role="status">
      <span class="sr-only">Loading...</span>
    </div>
    <p class="small text-muted mt-4 mb-0">Preparing your release</p>
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-multi-layer-spinner {
  position: relative; display: inline-block; width: 4rem; height: 4rem; border-radius: 50%;
  border: 4px solid transparent; border-top-color: var(--wt-primary);
  animation: fx-multi-layer-spinner-spin 1.1s linear infinite;
}
.fx-multi-layer-spinner::before, .fx-multi-layer-spinner::after { content: ""; position: absolute; border-radius: 50%; border: 4px solid transparent; }
.fx-multi-layer-spinner::before { inset: 4px; border-top-color: var(--wt-secondary); animation: fx-multi-layer-spinner-spin 1.7s linear infinite reverse; }
.fx-multi-layer-spinner::after { inset: 14px; border-top-color: var(--wt-accent); animation: fx-multi-layer-spinner-spin .8s linear infinite; }
@keyframes fx-multi-layer-spinner-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .fx-multi-layer-spinner, .fx-multi-layer-spinner::before, .fx-multi-layer-spinner::after, .fx-multi-layer-spinner *, .fx-multi-layer-spinner *::before, .fx-multi-layer-spinner *::after { animation: none !important; transition: none !important; }
}

2Bouncing Text

Makes each letter of a short word hop in turn; wrap every letter in a span with --i set to its index. Class: fx-bouncing-text

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <h2 class="display-5 font-bold mb-0 fx-bouncing-text" aria-label="Launch"><span style="--i:0" aria-hidden="true">L</span><span style="--i:1" aria-hidden="true">a</span><span style="--i:2" aria-hidden="true">u</span><span style="--i:3" aria-hidden="true">n</span><span style="--i:4" aria-hidden="true">c</span><span style="--i:5" aria-hidden="true">h</span></h2>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-bouncing-text { display: inline-flex; }
.fx-bouncing-text > span {
  display: inline-block;
  animation: fx-bouncing-text-bounce 1.6s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * .09s);
}
@keyframes fx-bouncing-text-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  25% { transform: translateY(-14px); color: var(--wt-primary-ink); }
  40% { transform: translateY(2px); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-bouncing-text, .fx-bouncing-text::before, .fx-bouncing-text::after, .fx-bouncing-text *, .fx-bouncing-text *::before, .fx-bouncing-text *::after { animation: none !important; transition: none !important; }
}

3Heartbeat

A double-beat pulse for like buttons, favourite icons and notification badges. Class: fx-heartbeat

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <span class="display-4 text-danger-emphasis fx-heartbeat"><i class="bi bi-heart-fill" aria-hidden="true"></i></span> 
  <button type="button" class="btn btn-outline-danger rounded-full"><span class="fx-heartbeat"><i class="bi bi-heart-fill" aria-hidden="true"></i></span> 84 likes</button>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-heartbeat { display: inline-block; animation: fx-heartbeat-beat 1.5s ease-in-out infinite; transform-origin: center; }
@keyframes fx-heartbeat-beat {
  0%, 40%, 100% { transform: scale(1); }
  12% { transform: scale(1.2); }
  24% { transform: scale(.96); }
  32% { transform: scale(1.14); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-heartbeat, .fx-heartbeat::before, .fx-heartbeat::after, .fx-heartbeat *, .fx-heartbeat *::before, .fx-heartbeat *::after { animation: none !important; transition: none !important; }
}