Creates a toggle switch with CSS only.

toggle_switch.html

<style>
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
  background-color: rgba(0, 0, 0, 0.25);
  border-radius: 20px;
  transition: all 0.3s;
}
.switch::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 18px;
  background-color: white;
  top: 1px;
  left: 1px;
  transition: all 0.3s;
}
input[type='checkbox']:checked + .switch::after {
  transform: translateX(20px);
}
input[type='checkbox']:checked + .switch {
  background-color: #7983ff;
}
.offscreen {
  position: absolute;
  left: -9999px;
}
</style>
<input type="checkbox" id="toggle" class="offscreen" /> <label for="toggle" class="switch"></label>