Segmented LED Toggle Switch
A dark hardware panel with a row of LED segments. As the square knob slides across, the segments behind it light up one after another and switch off in reverse, staggered with transition-delay.
Also known as: segmented toggle switch, led toggle switch css, level meter toggle, hardware toggle switch css.
HTML
<label class="tgl-segmented-led-toggle">
<input type="checkbox" role="switch" aria-label="Boost">
<span class="tgl-segmented-led-toggle-track" aria-hidden="true">
<span class="tgl-segmented-led-toggle-bars"><i style="--i: 0"></i><i style="--i: 1"></i><i style="--i: 2"></i><i style="--i: 3"></i><i style="--i: 4"></i><i style="--i: 5"></i><i style="--i: 6"></i><i style="--i: 7"></i></span>
<span class="tgl-segmented-led-toggle-knob"></span>
</span>
</label>CSS
.tgl-segmented-led-toggle {
--c: var(--tgl-color, #3b82f6);
font-size: var(--tgl-size, 24px);
position: relative;
display: inline-flex;
align-items: center;
vertical-align: middle;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
font-family: system-ui, sans-serif;
line-height: 1.2;
}
.tgl-segmented-led-toggle input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.tgl-segmented-led-toggle-track {
position: relative;
display: block;
width: 5.2em;
height: 2.2em;
border-radius: 0.6em;
background: linear-gradient(#18181b, #0c0c0e);
box-shadow: inset 0 0.1em 0.3em rgb(0 0 0 / 0.7), 0 0 0 1px rgb(255 255 255 / 0.08), 0 0.3em 0.6em -0.3em rgb(0 0 0 / 0.45);
}
.tgl-segmented-led-toggle-bars {
position: absolute;
inset: 0 0.55em;
display: flex;
align-items: center;
justify-content: space-between;
}
.tgl-segmented-led-toggle-bars i {
width: 0.2em;
height: 0.85em;
border-radius: 0.1em;
background: rgb(255 255 255 / 0.1);
transition: background-color 0.15s ease, box-shadow 0.15s ease;
transition-delay: calc((7 - var(--i)) * 40ms);
}
.tgl-segmented-led-toggle-knob {
position: absolute;
top: 0.25em;
left: 0.25em;
width: 1.7em;
height: 1.7em;
border-radius: 0.4em;
background: linear-gradient(160deg, #52525b, #2a2a2f);
box-shadow: inset 0 0.06em 0.04em rgb(255 255 255 / 0.25), 0 0.15em 0.3em rgb(0 0 0 / 0.6);
transition: transform 0.45s cubic-bezier(0.65, 0, 0.35, 1);
}
/* the grip lines */
.tgl-segmented-led-toggle-knob::before {
content: "";
position: absolute;
inset: 0.5em 0.6em;
background: repeating-linear-gradient(90deg, rgb(255 255 255 / 0.22) 0 0.08em, transparent 0.08em 0.2em);
}
.tgl-segmented-led-toggle:active .tgl-segmented-led-toggle-knob {
scale: 0.94;
}
.tgl-segmented-led-toggle input:checked + .tgl-segmented-led-toggle-track .tgl-segmented-led-toggle-knob {
transform: translateX(3em);
}
.tgl-segmented-led-toggle input:checked + .tgl-segmented-led-toggle-track .tgl-segmented-led-toggle-bars i {
background: color-mix(in srgb, var(--c) 80%, #fff);
box-shadow: 0 0 0.2em var(--c), 0 0 0.5em color-mix(in srgb, var(--c) 60%, transparent);
transition-delay: calc(var(--i) * 40ms);
}
.tgl-segmented-led-toggle input:focus-visible + .tgl-segmented-led-toggle-track {
outline: 0.12em solid var(--c);
outline-offset: 0.2em;
}
@media (prefers-reduced-motion: reduce) {
.tgl-segmented-led-toggle *,
.tgl-segmented-led-toggle *::before,
.tgl-segmented-led-toggle *::after {
transition-duration: 0.01ms !important;
animation-duration: 0.01ms !important;
animation-delay: 0s !important;
animation-iteration-count: 1 !important;
}
}
@media (prefers-reduced-motion: reduce) {
.tgl-segmented-led-toggle, .tgl-segmented-led-toggle *, .tgl-segmented-led-toggle::before, .tgl-segmented-led-toggle::after, .tgl-segmented-led-toggle *::before, .tgl-segmented-led-toggle *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--tgl-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--tgl-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.