Pulse Hover Effect
While hovered, the button breathes in and out around its own size, a little bigger then a little smaller, once a second. It stops the moment the pointer leaves, so it never nags at rest.
Also known as: hvr-pulse, pulsing button on hover, hover.css pulse.
HTML
<button class="hfx-pulse"><span class="hfx-pulse-dot"></span>Watch live</button>
CSS
.hfx-pulse {
--c: var(--hfx-color, #3b82f6);
display: inline-flex;
align-items: center;
gap: 0.5em;
padding: 0.7em 1.6em;
border-radius: 0.5em;
font: 600 var(--hfx-size, 16px) system-ui, sans-serif;
cursor: pointer;
border: 0;
background: var(--c);
color: #fff;
border-radius: 2em;}
.hfx-pulse-dot {
width: 0.5em;
height: 0.5em;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 0 0.2em rgb(255 255 255 / 0.3);
}
.hfx-pulse:is(:hover, :focus-visible) {
animation: hfx-pulse-beat 1s linear infinite;
}
@keyframes hfx-pulse-beat {
0%, 100% { transform: scale(1); animation-timing-function: ease-out; }
25% { transform: scale(1.09); animation-timing-function: ease-in-out; }
75% { transform: scale(0.95); animation-timing-function: ease-in; }
}
@media (prefers-reduced-motion: reduce) {
.hfx-pulse, .hfx-pulse *, .hfx-pulse::before, .hfx-pulse::after, .hfx-pulse *::before, .hfx-pulse *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--hfx-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--hfx-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - 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.