CSS Animation Glitch Example

<!doctype html>
<title>Example</title>
<style>
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: sans-serif;
    background-color: #111; /* Dark theme looks best */
}

/* Base text */
.glitch {
    font-size: 5rem;
    font-weight: bold;
    text-transform: uppercase;
    position: relative;
    color: white;
}

/* Define the pseudo-elements that will animate on top of the original */
.glitch::before,
.glitch::after {
    content: attr(data-text); /* Pull the text from the HTML attribute */
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Red channel shifting left */
.glitch::before {
    left: 2px;
    text-shadow: -2px 0 red;
    background: #111;
    overflow: hidden;
    animation: noise-anim 2s infinite linear alternate-reverse;
}

/* Blue channel shifting right */
.glitch::after {
    left: -2px;
    text-shadow: -2px 0 blue;
    background: #111;
    overflow: hidden;
    animation: noise-anim-2 3s infinite linear alternate-reverse;
}

/* Complex keyframes offsetting the clip-path height */
@keyframes noise-anim {
    0% { clip-path: inset(40% 0 61% 0); }
    20% { clip-path: inset(92% 0 1% 0); }
    40% { clip-path: inset(43% 0 1% 0); }
    60% { clip-path: inset(25% 0 58% 0); }
    80% { clip-path: inset(54% 0 7% 0); }
    100% { clip-path: inset(58% 0 43% 0); }
}

@keyframes noise-anim-2 {
    0% { clip-path: inset(26% 0 14% 0); }
    20% { clip-path: inset(21% 0 41% 0); }
    40% { clip-path: inset(6% 0 48% 0); }
    60% { clip-path: inset(80% 0 15% 0); }
    80% { clip-path: inset(5% 0 79% 0); }
    100% { clip-path: inset(91% 0 7% 0); }
}

@media (prefers-reduced-motion: reduce) {
    .glitch::before,
    .glitch::after {
        display: none; /* Instantly removes the flashing glitch overlays */
    }
}
</style>

<div class="glitch" data-text="ERROR">ERROR</div>