An old knife switch: the copper blade drops into its clip with a little bounce, sparks fly at the contact and the lamp on the base lights up. Opening it swings the blade back up.
Also known as: knife switch css, lever toggle switch, frankenstein power switch.
<label class="tgl-power-lever-switch">
<input type="checkbox" role="switch" aria-label="Main power">
<span class="tgl-power-lever-switch-rig" aria-hidden="true">
<span class="tgl-power-lever-switch-lamp"></span>
<span class="tgl-power-lever-switch-blade"></span>
<span class="tgl-power-lever-switch-clip"></span>
<span class="tgl-power-lever-switch-spark"></span>
</span>
</label>.tgl-power-lever-switch {
--c: var(--tgl-color, #3b82f6);
font-size: var(--tgl-size, 24px);
position: relative;
display: inline-flex;
align-items: center;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
}
.tgl-power-lever-switch input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.tgl-power-lever-switch-rig {
position: relative;
display: block;
width: 7.6em;
height: 5em;
}
/* base block and the hinge post */
.tgl-power-lever-switch-rig::before {
content: "";
position: absolute;
left: 0;
right: 0.3em;
bottom: 0.2em;
height: 1.3em;
border-radius: 0.4em;
background: linear-gradient(#475569, #1e293b);
box-shadow: 0 0.2em 0.35em rgba(0, 0, 0, 0.3), inset 0 0.08em 0 rgba(255, 255, 255, 0.18);
}
.tgl-power-lever-switch-rig::after {
content: "";
position: absolute;
left: 0.7em;
bottom: 1.5em;
z-index: 1;
width: 0.55em;
height: 1.1em;
border-radius: 0.12em 0.12em 0 0;
background: linear-gradient(90deg, #92400e, #f59e0b, #92400e);
}
.tgl-power-lever-switch-clip {
position: absolute;
left: 5.05em;
bottom: 1.5em;
z-index: 3;
width: 0.7em;
height: 1.1em;
border-radius: 0.12em 0.12em 0 0;
background: linear-gradient(90deg, #92400e, #fbbf24 28%, #451a03 40% 60%, #fbbf24 72%, #92400e);
}
.tgl-power-lever-switch-blade {
position: absolute;
left: 0.82em;
bottom: 2.18em;
z-index: 2;
width: 4.9em;
height: 0.34em;
border-radius: 0.17em;
background: linear-gradient(#fcd34d, #d97706 55%, #92400e);
transform-origin: 0.15em 50%;
transform: rotate(-20deg);
transition: transform 0.45s cubic-bezier(0.3, 0.7, 0.4, 1);
}
.tgl-power-lever-switch-blade::before {
content: "";
position: absolute;
left: -0.05em;
top: -0.05em;
width: 0.4em;
height: 0.4em;
border-radius: 50%;
background: #fde68a;
box-shadow: inset 0 0 0 0.08em #b45309;
}
/* the handle takes the accent color */
.tgl-power-lever-switch-blade::after {
content: "";
position: absolute;
left: 100%;
top: calc(50% - 0.31em);
width: 1.1em;
height: 0.62em;
border-radius: 0.31em;
background: linear-gradient(color-mix(in srgb, var(--c) 70%, #fff), var(--c) 50%, color-mix(in srgb, var(--c) 60%, #000));
box-shadow: 0 0.1em 0.2em rgba(0, 0, 0, 0.3);
}
.tgl-power-lever-switch-lamp {
position: absolute;
left: 2.7em;
bottom: 0.55em;
width: 0.6em;
height: 0.6em;
border-radius: 50%;
background: #52525b;
box-shadow: inset 0 0.06em 0.1em rgba(0, 0, 0, 0.5);
transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.tgl-power-lever-switch-spark {
position: absolute;
left: 4.6em;
bottom: 1.55em;
z-index: 4;
width: 1.6em;
height: 1.6em;
border-radius: 50%;
background: repeating-conic-gradient(from -6deg, #fde047 0 12deg, transparent 0 45deg);
-webkit-mask: radial-gradient(circle, transparent 0.2em, #000 0.22em 0.75em, transparent 0.77em);
mask: radial-gradient(circle, transparent 0.2em, #000 0.22em 0.75em, transparent 0.77em);
filter: drop-shadow(0 0 0.15em #f59e0b);
opacity: 0;
}
.tgl-power-lever-switch input:checked + .tgl-power-lever-switch-rig .tgl-power-lever-switch-blade {
transform: rotate(0deg);
transition: none;
animation: tgl-power-lever-switch-close 0.55s both;
}
.tgl-power-lever-switch input:checked + .tgl-power-lever-switch-rig .tgl-power-lever-switch-spark {
animation: tgl-power-lever-switch-spark 0.45s ease-out 0.28s both;
}
.tgl-power-lever-switch input:checked + .tgl-power-lever-switch-rig .tgl-power-lever-switch-lamp {
background: var(--c);
box-shadow: 0 0 0.5em 0.1em var(--c);
transition-delay: 0.3s;
}
@keyframes tgl-power-lever-switch-close {
0% { transform: rotate(-20deg); animation-timing-function: cubic-bezier(0.55, 0, 0.9, 0.5); }
55% { transform: rotate(1deg); animation-timing-function: ease-out; }
72% { transform: rotate(-3deg); animation-timing-function: ease-in-out; }
88% { transform: rotate(0.5deg); }
100% { transform: rotate(0deg); }
}
@keyframes tgl-power-lever-switch-spark {
0% { opacity: 0; transform: scale(0.3) rotate(0deg); }
30% { opacity: 1; }
100% { opacity: 0; transform: scale(1.4) rotate(25deg); }
}
.tgl-power-lever-switch input:focus-visible + .tgl-power-lever-switch-rig {
outline: 2px solid var(--c);
outline-offset: 0.2em;
border-radius: 0.4em;
}
@media (prefers-reduced-motion: reduce) {
.tgl-power-lever-switch, .tgl-power-lever-switch *, .tgl-power-lever-switch::before, .tgl-power-lever-switch::after, .tgl-power-lever-switch *::before, .tgl-power-lever-switch *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}--tgl-color on the element or a parent.
Currently previewing #3b82f6.--tgl-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 24px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.