Pulse CTA Button
A call to action that sends soft rings out from its edge on a steady rhythm, to pull the eye without a hover. Two pseudo-elements take turns scaling and fading behind the button.
Also known as: css button pulse animation, pulse animation css button, attention button css.
HTML
<button class="btn-pulse-cta" type="button">Book a demo</button>
CSS
.btn-pulse-cta {
--c: var(--btn-color, #3b82f6);
display: inline-flex;
align-items: center;
justify-content: center;
gap: 0.5em;
padding: 0.75em 1.6em;
border: 0;
border-radius: 0.6em;
font: 600 var(--btn-size, 18px)/1.1 system-ui, sans-serif;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
position: relative;
isolation: isolate;
padding: 0.85em 1.9em;
border-radius: 2em;
background: var(--c);
color: #fff;
transition: transform 0.2s ease;}
.btn-pulse-cta::before,
.btn-pulse-cta::after {
content: "";
position: absolute;
inset: 0;
z-index: -1;
border-radius: inherit;
background: var(--c);
opacity: 0;
animation: btn-pulse-cta-ring 2.4s cubic-bezier(0.2, 0.6, 0.35, 1) infinite;
pointer-events: none;
}
.btn-pulse-cta::after { animation-delay: 1.2s; }
.btn-pulse-cta:active { transform: scale(0.96); }
@keyframes btn-pulse-cta-ring {
0% { opacity: 0.45; transform: scale(1); }
100% { opacity: 0; transform: scale(1.22, 1.75); }
}
@media (prefers-reduced-motion: reduce) {
.btn-pulse-cta, .btn-pulse-cta *, .btn-pulse-cta::before, .btn-pulse-cta::after, .btn-pulse-cta *::before, .btn-pulse-cta *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Tailwind CSS version
The same effect using Tailwind utility classes. No custom CSS or config needed.
<button class="relative isolate rounded-full bg-blue-500 px-7 py-3 font-semibold text-white active:scale-95"> <span class="absolute inset-0 -z-10 animate-ping rounded-full bg-blue-500 opacity-40"></span> Book a demo </button>
Customizing this snippet
- Color: set
--btn-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--btn-size. Every other dimension is inem, so the whole thing scales together. Currently previewing18px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.