Slide In Up
Rises out of its own bottom edge: a clip-path inset moves with the transform, so the element never overlaps what sits below it. Good for sheets, footers and reveal cards.
Also known as: css slide up animation, slide in from bottom css, slide up reveal.
HTML
<div class="kfa-slide-in-up">Slide</div>
CSS
.kfa-slide-in-up {
--c: var(--kfa-color, #3b82f6);
font-size: var(--kfa-size, 16px);
display: grid;
place-items: center;
width: 5.5em;
height: 5.5em;
border-radius: 1em;
background: var(--c);
color: #fff;
font-family: system-ui, sans-serif;
font-weight: 700;
box-shadow: 0 0.6em 1.4em -0.6em color-mix(in srgb, var(--c) 70%, transparent);
animation: kfa-slide-in-up-kf 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}
/* The bottom inset tracks the translate, so the clip line stays on the final bottom edge. */
@keyframes kfa-slide-in-up-kf {
from {
transform: translateY(100%);
clip-path: inset(0 -1em 100% -1em);
}
to {
transform: translateY(0);
clip-path: inset(-1em -1em -2em -1em);
}
}
@media (prefers-reduced-motion: reduce) {
.kfa-slide-in-up, .kfa-slide-in-up *, .kfa-slide-in-up::before, .kfa-slide-in-up::after, .kfa-slide-in-up *::before, .kfa-slide-in-up *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--kfa-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--kfa-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.