Fade In Blur
Comes into focus: opacity rises while a filter blur drops from about half an em to zero, with no movement at all. Calm enough for hero images; filter costs more than opacity.
Also known as: blur in animation css, blur to focus animation, focus in effect css.
Blur
HTML
<div class="kfa-fade-in-blur">Blur</div>
CSS
.kfa-fade-in-blur {
--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-fade-in-blur-kf 0.9s cubic-bezier(0.25, 1, 0.5, 1) both;
}
@keyframes kfa-fade-in-blur-kf {
from { opacity: 0; filter: blur(0.6em); }
to { opacity: 1; filter: blur(0); }
}
@media (prefers-reduced-motion: reduce) {
.kfa-fade-in-blur, .kfa-fade-in-blur *, .kfa-fade-in-blur::before, .kfa-fade-in-blur::after, .kfa-fade-in-blur *::before, .kfa-fade-in-blur *::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.