Bar Chart Loader
Four chart bars spring up from an axis with a little overshoot, hold, then drop away and grow again. A natural fit for dashboards, reports and analytics panels while data loads.
Also known as: chart loading animation, graph loader, analytics loader.
HTML
<div class="ldr-bar-chart" role="status" aria-label="Loading chart"> <span></span><span></span><span></span><span></span> </div>
CSS
.ldr-bar-chart {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
display: flex;
align-items: flex-end;
gap: calc(var(--s) / 9);
box-sizing: border-box;
width: calc(var(--s) * 1.2);
height: var(--s);
padding: 0 calc(var(--s) / 10) calc(var(--s) / 12);
}
.ldr-bar-chart::after {
content: "";
position: absolute;
left: 0;
right: 0;
bottom: 0;
height: calc(var(--s) / 20);
border-radius: var(--s);
background: color-mix(in srgb, var(--ldr-color, #3b82f6) 35%, transparent);
}
.ldr-bar-chart span {
flex: 1;
height: var(--h);
border-radius: calc(var(--s) / 20) calc(var(--s) / 20) 0 0;
background: color-mix(in srgb, var(--ldr-color, #3b82f6) 50%, transparent);
transform: scaleY(0);
transform-origin: 50% 100%;
animation: ldr-bar-chart-grow 2.4s infinite;
}
.ldr-bar-chart span:nth-child(1) { --h: 42%; }
.ldr-bar-chart span:nth-child(2) { --h: 68%; animation-delay: 0.15s; }
.ldr-bar-chart span:nth-child(3) { --h: 54%; animation-delay: 0.3s; }
.ldr-bar-chart span:nth-child(4) { --h: 92%; animation-delay: 0.45s; background: var(--c); }
@keyframes ldr-bar-chart-grow {
0% { transform: scaleY(0); animation-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1); }
22% { transform: scaleY(1); }
68% { transform: scaleY(1); animation-timing-function: cubic-bezier(0.5, 0, 0.75, 0); }
80%, 100% { transform: scaleY(0); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-bar-chart, .ldr-bar-chart *, .ldr-bar-chart::before, .ldr-bar-chart::after, .ldr-bar-chart *::before, .ldr-bar-chart *::after {
animation-duration: 3s;
}
}Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.