Heartbeat Text Animation
A double beat, lub then dub, ripples through the letters with a soft glow on each thump. The stagger is only 40ms per letter, so it reads as one heartbeat rather than a wave.
Also known as: beating heart text, lub dub text animation, pulsing letters css.
HTML
<div class="txt-heartbeat-text" aria-label="Made with love"><span aria-hidden="true"><span style="--i: 0">M</span><span style="--i: 1">a</span><span style="--i: 2">d</span><span style="--i: 3">e</span><span style="--i: 4"> </span><span style="--i: 5">w</span><span style="--i: 6">i</span><span style="--i: 7">t</span><span style="--i: 8">h</span><span style="--i: 9"> </span><span style="--i: 10">l</span><span style="--i: 11">o</span><span style="--i: 12">v</span><span style="--i: 13">e</span></span></div>
CSS
.txt-heartbeat-text {
--c: var(--txt-color, #3b82f6);
font-size: var(--txt-size, 32px);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
color: var(--c);
letter-spacing: 0.02em;}
.txt-heartbeat-text span span {
display: inline-block;
animation: txt-heartbeat-text-beat 1.4s ease-in-out infinite;
animation-delay: calc(var(--i) * 0.04s);
}
@keyframes txt-heartbeat-text-beat {
0%, 38%, 100% { transform: scale(1); text-shadow: 0 0 0 transparent; }
8% { transform: scale(1.2); text-shadow: 0 0 0.3em color-mix(in srgb, var(--c) 60%, transparent); }
16% { transform: scale(1); text-shadow: 0 0 0.1em color-mix(in srgb, var(--c) 25%, transparent); }
25% { transform: scale(1.1); text-shadow: 0 0 0.25em color-mix(in srgb, var(--c) 45%, transparent); }
}
@media (prefers-reduced-motion: reduce) {
.txt-heartbeat-text, .txt-heartbeat-text *, .txt-heartbeat-text::before, .txt-heartbeat-text::after, .txt-heartbeat-text *::before, .txt-heartbeat-text *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--txt-coloron the element or a parent. Currently previewing#3b82f6. - Font size: set
--txt-size. Every other dimension is inem, so the whole thing scales together. Currently previewing40px. - 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.