Sliding Border
A real @property-animated conic gradient traces around the chip on hover — true CSS angle animation, not the keyframes-on-position hack everyone else uses.
Sliding Border the 3rd of 20 designs in the 20 CSS Tags & Chips Designs collection. The design is implemented in pure CSS — no JavaScript required. Copy the HTML and CSS panels below into your project. Because the demo is pure CSS, it works in any framework or templating engine you happen to use. The design honours prefers-reduced-motion and uses real semantic markup, so it ships accessibility-ready out of the box.
Live preview
The code
<a href="#" class="ctc-slide"> <span>Premium</span> </a>
.ctc-slide {
position: relative;
display: inline-flex;
align-items: center;
padding: 10px 20px;
border-radius: 999px;
background: #15151d;
color: #f0eeff;
font:
600 13px/1 system-ui,
sans-serif;
text-decoration: none;
isolation: isolate;
}
.ctc-slide::before {
content: "";
position: absolute;
inset: -1.5px;
border-radius: inherit;
background: conic-gradient(from var(--ctc-angle), #7c6cff, #ff6c8a, #2eb88a, #7c6cff);
z-index: -1;
}
.ctc-slide:hover {
animation: ctc-slide-spin 2.4s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
.ctc-slide:hover,
.ctc-aurora,
.ctc-status-dot::after,
.ctc-marquee:hover .ctc-marquee-track,
.ctc-marquee:focus-visible .ctc-marquee-track,
.ctc-life-chip[data-state="adding"],
.ctc-life-chip[data-state="adding"] .ctc-life-icon {
animation: none !important;
}
.ctc-life-chip[data-state="adding"] {
transform: none;
opacity: 1;
}
}
@keyframes ctc-slide-spin { to { --ctc-angle: 360deg; } }