Modern CSS Animations

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

1Glitch Text

Splits a heading into offset colour slices that jitter like a broken screen; repeat the text in data-text. Class: fx-glitch-text

GLITCH MODE

<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 rounded-4 px-4 py-5 text-center w-100" style="max-width:19rem">
    <h2 class="display-6 fw-bold text-white mb-0 fx-glitch-text" data-text="GLITCH MODE">GLITCH MODE</h2>
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-glitch-text { position: relative; display: inline-block; }
.fx-glitch-text::before, .fx-glitch-text::after {
  content: attr(data-text); position: absolute; inset: 0; pointer-events: none;
  -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0);
}
.fx-glitch-text::before { color: var(--wt-accent); left: 2px; text-shadow: -1px 0 var(--wt-primary); animation: fx-glitch-text-a 2.6s steps(1) infinite; }
.fx-glitch-text::after { color: var(--wt-secondary); left: -2px; text-shadow: 1px 0 var(--wt-accent); animation: fx-glitch-text-b 3.1s steps(1) infinite; }
@keyframes fx-glitch-text-a {
  0% { -webkit-clip-path: inset(0 0 82% 0); clip-path: inset(0 0 82% 0); transform: translate(-3px, -1px); }
  15% { -webkit-clip-path: inset(30% 0 52% 0); clip-path: inset(30% 0 52% 0); transform: translate(3px, 1px); }
  30% { -webkit-clip-path: inset(62% 0 20% 0); clip-path: inset(62% 0 20% 0); transform: translate(-2px, 0); }
  45% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); }
  80% { -webkit-clip-path: inset(12% 0 70% 0); clip-path: inset(12% 0 70% 0); transform: translate(2px, -1px); }
  90% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); }
}
@keyframes fx-glitch-text-b {
  0% { -webkit-clip-path: inset(70% 0 8% 0); clip-path: inset(70% 0 8% 0); transform: translate(2px, 1px); }
  20% { -webkit-clip-path: inset(8% 0 76% 0); clip-path: inset(8% 0 76% 0); transform: translate(-3px, 0); }
  35% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); }
  70% { -webkit-clip-path: inset(40% 0 38% 0); clip-path: inset(40% 0 38% 0); transform: translate(3px, -1px); }
  85% { -webkit-clip-path: inset(50% 0 50% 0); clip-path: inset(50% 0 50% 0); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-glitch-text, .fx-glitch-text::before, .fx-glitch-text::after, .fx-glitch-text *, .fx-glitch-text *::before, .fx-glitch-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

Hello, world.

<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">Hello, world.</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(--bs-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; }
}

3Shimmer Skeleton

Loading placeholders with a light sweep; add the class to every grey block of a skeleton card. Class: fx-shimmer-skeleton

<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
  <div class="card w-100" style="max-width:18rem" aria-busy="true" aria-label="Loading content">
    <div class="card-body">
      <div class="d-flex align-items-center gap-3 mb-3">
        <span class="fx-shimmer-skeleton rounded-circle flex-shrink-0" style="width:48px;height:48px"></span> 
        <div class="flex-grow-1">
          <span class="fx-shimmer-skeleton mb-2" style="width:70%"></span><span class="fx-shimmer-skeleton" style="width:45%"></span>
        </div>
      </div>
      <span class="fx-shimmer-skeleton mb-2" style="height:70px"></span> <span class="fx-shimmer-skeleton mb-2"></span> <span class="fx-shimmer-skeleton" style="width:60%"></span> 
    </div>
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-shimmer-skeleton {
  display: block; min-height: .9rem; border-radius: var(--wt-radius, .5rem);
  background: linear-gradient(90deg, rgba(var(--wt-primary-rgb), .08) 25%, rgba(var(--wt-primary-rgb), .22) 37%, rgba(var(--wt-primary-rgb), .08) 63%);
  background-size: 400% 100%;
  animation: fx-shimmer-skeleton-shine 1.4s ease infinite;
}
@keyframes fx-shimmer-skeleton-shine { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }
@media (prefers-reduced-motion: reduce) {
  .fx-shimmer-skeleton, .fx-shimmer-skeleton::before, .fx-shimmer-skeleton::after, .fx-shimmer-skeleton *, .fx-shimmer-skeleton *::before, .fx-shimmer-skeleton *::after { animation: none !important; transition: none !important; }
}