Wi-Fi Signal Loader
Three signal arcs light up outward from a dot, over and over, the universal 'connecting…' symbol. Good for reconnect states, pairing and network checks.
Also known as: connecting animation, signal strength loader.
HTML
<div class="ldr-wifi" role="status" aria-label="Connecting"> <span></span><span></span><span></span> </div>
CSS
.ldr-wifi {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
width: var(--s);
height: var(--s);
}
.ldr-wifi::before {
content: "";
position: absolute;
bottom: 8%;
left: 50%;
width: calc(var(--s) / 8);
height: calc(var(--s) / 8);
margin-left: calc(var(--s) / -16);
border-radius: 50%;
background: var(--c);
}
.ldr-wifi span {
position: absolute;
bottom: calc(8% + var(--s) / 16 - var(--s) * var(--r) / 2);
left: 50%;
width: calc(var(--s) * var(--r));
height: calc(var(--s) * var(--r));
border: calc(var(--s) / 12) solid transparent;
border-top-color: var(--c);
border-radius: 50%;
transform: translateX(-50%);
animation: ldr-wifi-light 1.6s ease-in-out infinite;
}
.ldr-wifi span:nth-child(1) { --r: 0.38; }
.ldr-wifi span:nth-child(2) { --r: 0.68; animation-delay: 0.2s; }
.ldr-wifi span:nth-child(3) { --r: 0.98; animation-delay: 0.4s; }
@keyframes ldr-wifi-light {
0%, 100% { opacity: 0.15; }
25%, 65% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
.ldr-wifi, .ldr-wifi *, .ldr-wifi::before, .ldr-wifi::after {
animation-duration: 3s;
}
}Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.