Stop Generating Button
The round stop button chat apps show while a reply streams: a rounded square in the middle, gently pulsing, with an arc spinning around the rim. Keeps an aria-label for screen readers.
Also known as: stop response button, ai stop button spinner, cancel generation button.
HTML
<button class="ldr-stop-generating-button" type="button" aria-busy="true" aria-label="Stop generating"><span aria-hidden="true"></span></button>
CSS
.ldr-stop-generating-button {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
display: grid;
place-items: center;
width: var(--s);
height: var(--s);
padding: 0;
border: 0;
border-radius: 50%;
background: color-mix(in srgb, var(--ldr-color, #3b82f6) 14%, transparent);
cursor: pointer;
}
.ldr-stop-generating-button::before {
content: "";
position: absolute;
inset: calc(var(--s) / 16);
box-sizing: border-box;
border: calc(var(--s) / 16) solid transparent;
border-top-color: var(--c);
border-radius: 50%;
animation: ldr-stop-generating-button-spin 1s cubic-bezier(0.55, 0.15, 0.45, 0.85) infinite;
}
.ldr-stop-generating-button span {
width: 32%;
height: 32%;
border-radius: calc(var(--s) / 18);
background: var(--c);
animation: ldr-stop-generating-button-pulse 2s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
@keyframes ldr-stop-generating-button-spin {
to { transform: rotate(360deg); }
}
@keyframes ldr-stop-generating-button-pulse {
0%, 100% { transform: scale(1); }
50% { transform: scale(0.82); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-stop-generating-button, .ldr-stop-generating-button *, .ldr-stop-generating-button::before, .ldr-stop-generating-button::after, .ldr-stop-generating-button *::before, .ldr-stop-generating-button *::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.