Notification Bell Checkbox
A bell that rings when you turn notifications on: it swings with a decaying wobble, the clapper lags a beat behind and two sound arcs fade out at its sides. Fills with the accent while checked.
Also known as: notify me checkbox, bell ring animation css, subscribe bell toggle.
HTML
<label class="chk-bell-notify">
<input type="checkbox">
<span class="chk-bell-notify-icon" aria-hidden="true">
<i class="chk-bell-notify-wave"></i>
<svg class="chk-bell-notify-bell" viewBox="0 0 24 24"><path d="M6.2 16.8V11a5.8 5.8 0 0 1 11.6 0v5.8l1.6 1.9H4.6zM12 5.2V3.4"/><path class="chk-bell-notify-clapper" d="M9.8 20.6a2.2 2.2 0 0 0 4.4 0z"/></svg>
<i class="chk-bell-notify-wave"></i>
</span>
<span class="chk-bell-notify-text">Notify me</span>
</label>CSS
.chk-bell-notify {
--c: var(--chk-color, #3b82f6);
font-size: var(--chk-size, 24px);
position: relative;
display: inline-flex;
align-items: center;
gap: 0.6em;
line-height: 1.3;
cursor: pointer;
-webkit-user-select: none;
user-select: none;
-webkit-tap-highlight-color: transparent;
gap: 0.75em;}
.chk-bell-notify input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.chk-bell-notify-icon {
position: relative;
display: grid;
place-items: center;
width: 1.6em;
height: 1.6em;
border-radius: 0.35em;
}
.chk-bell-notify-bell {
width: 1.4em;
height: 1.4em;
fill: transparent;
stroke: color-mix(in srgb, currentColor 70%, transparent);
stroke-width: 1.7;
stroke-linecap: round;
stroke-linejoin: round;
transform-origin: 50% 12%;
transition: fill 0.25s ease, stroke 0.25s ease;
}
.chk-bell-notify-clapper {
transform-box: fill-box;
transform-origin: 50% 0;
}
.chk-bell-notify-wave {
--dir: -1;
position: absolute;
top: 18%;
left: -0.3em;
width: 0.45em;
height: 0.9em;
border: 0.11em solid transparent;
border-left-color: var(--c);
border-radius: 50%;
opacity: 0;
}
.chk-bell-notify-bell + .chk-bell-notify-wave {
--dir: 1;
left: auto;
right: -0.3em;
border-left-color: transparent;
border-right-color: var(--c);
}
.chk-bell-notify-text {
transition: color 0.25s ease;
}
.chk-bell-notify:hover .chk-bell-notify-bell {
stroke: var(--c);
}
.chk-bell-notify input:checked + .chk-bell-notify-icon .chk-bell-notify-bell {
fill: var(--c);
stroke: var(--c);
animation: chk-bell-notify-ring 0.9s ease-in-out;
}
.chk-bell-notify input:checked + .chk-bell-notify-icon .chk-bell-notify-clapper {
animation: chk-bell-notify-clap 0.9s ease-in-out 0.06s;
}
.chk-bell-notify input:checked + .chk-bell-notify-icon .chk-bell-notify-wave {
animation: chk-bell-notify-wave 0.8s ease-out 0.1s;
}
.chk-bell-notify input:checked ~ .chk-bell-notify-text {
color: var(--c);
}
.chk-bell-notify input:focus-visible + .chk-bell-notify-icon {
outline: 0.12em solid var(--c);
outline-offset: 0.18em;
}
@keyframes chk-bell-notify-ring {
0%, 100% { transform: rotate(0deg); }
12% { transform: rotate(22deg); }
28% { transform: rotate(-18deg); }
44% { transform: rotate(12deg); }
60% { transform: rotate(-8deg); }
76% { transform: rotate(4deg); }
}
@keyframes chk-bell-notify-clap {
0%, 100% { transform: translateX(0); }
20% { transform: translateX(-35%); }
40% { transform: translateX(30%); }
60% { transform: translateX(-18%); }
80% { transform: translateX(8%); }
}
@keyframes chk-bell-notify-wave {
0% { opacity: 0; transform: translateX(0) scale(0.6); }
30% { opacity: 1; }
100% { opacity: 0; transform: translateX(calc(var(--dir) * 0.3em)) scale(1.1); }
}
@media (prefers-reduced-motion: reduce) {
.chk-bell-notify, .chk-bell-notify *, .chk-bell-notify::before, .chk-bell-notify::after, .chk-bell-notify *::before, .chk-bell-notify *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--chk-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--chk-size. Every other dimension is inem, so the whole thing scales together. Currently previewing24px. - 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.