Liquid Glass Toggle Switch
The iOS 26 switch: a wide pill knob that lifts into a clear glass lens while you hold it, showing the track through a bright rim, then springs across. The lens uses backdrop-filter.
Also known as: liquid glass switch css, ios 26 toggle switch, glass knob switch.
HTML
<label class="tgl-liquid-glass">
<input type="checkbox" role="switch" aria-label="Bluetooth" checked>
<span class="tgl-liquid-glass-track" aria-hidden="true">
<span class="tgl-liquid-glass-knob"></span>
</span>
</label>CSS
.tgl-liquid-glass {
--c: var(--tgl-color, #3b82f6);
font-size: var(--tgl-size, 24px);
position: relative;
display: inline-block;
vertical-align: middle;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
}
.tgl-liquid-glass input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.tgl-liquid-glass-track {
position: relative;
display: block;
width: 3.9em;
height: 1.75em;
border-radius: 1em;
background: color-mix(in srgb, currentColor 13%, transparent);
transition: background-color 0.3s ease;
}
.tgl-liquid-glass-knob {
position: absolute;
top: 0.125em;
left: 0.125em;
width: 2.4em;
height: 1.5em;
border-radius: 0.75em;
background: #fff;
box-shadow:
0 0.1em 0.35em rgb(0 0 0 / 0.18),
inset 0 0 0 1px rgb(255 255 255 / 0),
inset 0.1em 0.15em 0.3em rgb(255 255 255 / 0),
inset -0.1em -0.15em 0.3em rgb(0 0 0 / 0);
transition:
transform 0.5s cubic-bezier(0.34, 1.35, 0.5, 1),
background-color 0.25s ease,
box-shadow 0.25s ease;
}
/* the lens highlight, only while pressed */
.tgl-liquid-glass-knob::before {
content: "";
position: absolute;
inset: 0;
border-radius: inherit;
background: linear-gradient(rgb(255 255 255 / 0.55), rgb(255 255 255 / 0.05) 55%, rgb(255 255 255 / 0.2));
opacity: 0;
transition: opacity 0.25s ease;
}
.tgl-liquid-glass:active .tgl-liquid-glass-knob::before { opacity: 1; }
.tgl-liquid-glass input:checked + .tgl-liquid-glass-track { background: var(--c); }
.tgl-liquid-glass input:checked + .tgl-liquid-glass-track .tgl-liquid-glass-knob { transform: translateX(1.25em); }
/* pressed: the knob lifts, grows and turns into a clear lens */
.tgl-liquid-glass:active .tgl-liquid-glass-knob {
background: rgb(255 255 255 / 0.04);
box-shadow:
0 0.3em 0.8em rgb(0 0 0 / 0.16),
inset 0 0 0 1px rgb(255 255 255 / 0.9),
inset 0.12em 0.18em 0.25em rgb(255 255 255 / 0.75),
inset -0.12em -0.18em 0.3em rgb(0 0 0 / 0.12);
-webkit-backdrop-filter: blur(0.5px) brightness(1.08);
backdrop-filter: blur(0.5px) brightness(1.08);
transform: scale(1.3, 1.45);
}
.tgl-liquid-glass:active input:checked + .tgl-liquid-glass-track .tgl-liquid-glass-knob { transform: translateX(1.25em) scale(1.3, 1.45); }
.tgl-liquid-glass input:focus-visible + .tgl-liquid-glass-track {
outline: 2px solid var(--c);
outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
.tgl-liquid-glass, .tgl-liquid-glass *, .tgl-liquid-glass::before, .tgl-liquid-glass::after, .tgl-liquid-glass *::before, .tgl-liquid-glass *::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.