Modern CSS Animations

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

1Bouncing 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="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
  <h2 class="display-5 fw-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; }
}

2Typewriter

Types a single line of monospace text letter by letter with a blinking caret; set --fx-ch to the character count. Class: fx-typewriter

terminal

npm run build

<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
  <div class="bg-dark text-white rounded-3 p-3 w-100" style="max-width:18rem">
    <div class="small text-white-50 mb-1">
      terminal
    </div>
    <span class="fx-typewriter" style="--fx-ch:13">npm run build</span>
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-typewriter {
  display: inline-block; max-width: 100%; overflow: hidden; white-space: nowrap; vertical-align: bottom;
  font-family: var(--ui-font-monospace, monospace);
  width: calc(var(--fx-ch, 20) * 1ch + .15em);
  border-right: .12em solid var(--wt-primary);
  animation: fx-typewriter-type 4.5s steps(var(--fx-ch, 20)) infinite, fx-typewriter-caret .8s step-end infinite;
}
@keyframes fx-typewriter-type { 0% { width: 0; } 65%, 100% { width: calc(var(--fx-ch, 20) * 1ch + .15em); } }
@keyframes fx-typewriter-caret { 50% { border-color: transparent; } }
@media (prefers-reduced-motion: reduce) {
  .fx-typewriter, .fx-typewriter::before, .fx-typewriter::after, .fx-typewriter *, .fx-typewriter *::before, .fx-typewriter *::after { animation: none !important; transition: none !important; }
}