Spring Press Button
Press to squash it flat and wide, let go and it springs back with real damped overshoot. The release uses a linear() easing sampled from a spring, with a cubic-bezier fallback for older browsers.
Also known as: spring animation button css, elastic click button, css linear() spring easing.
HTML
<button class="btn-spring-press" type="button">Boing</button>
CSS
.btn-spring-press {
--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;
padding: 0.85em 2em;
border-radius: 1em;
background: var(--c);
color: #fff;
box-shadow: 0 0.45em 1em -0.45em var(--c);
transition: transform 0.7s cubic-bezier(0.3, 1.8, 0.5, 1);
transition: transform 0.9s linear(0, 0.135, 0.451, 0.812, 1.113, 1.294, 1.346, 1.294, 1.182, 1.058, 0.956, 0.896, 0.881, 0.9, 0.94, 0.983, 1.017, 1.037, 1.041, 1.034, 1.02, 1.005, 0.993, 0.987, 0.986, 0.989, 0.993, 0.999, 1.002, 1.005, 1.005, 1.004, 1.002, 1);}
.btn-spring-press:active {
transform: scale(1.1, 0.8);
transition: transform 0.15s cubic-bezier(0.3, 0, 0.6, 1);
}
.btn-spring-press:focus-visible {
outline: 2px solid var(--c);
outline-offset: 0.2em;
}
@media (prefers-reduced-motion: reduce) {
.btn-spring-press, .btn-spring-press *, .btn-spring-press::before, .btn-spring-press::after, .btn-spring-press *::before, .btn-spring-press *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}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.