CSSスイッチ生成

.switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-track {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #e5e7eb;
  border-radius: 50px;
  transition: background-color 200ms ease;
}

.switch-track::before {
  content: "";
  position: absolute;
  height: 24px;
  width: 24px;
  left: 2px;
  bottom: 2px;
  background-color: #ffffff;
  border-radius: 50px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: transform 200ms ease;
}

.switch input:checked + .switch-track {
  background-color: #3b82f6;
}

.switch input:checked + .switch-track::before {
  transform: translateX(24px);
}

.switch input:focus + .switch-track {
  box-shadow: 0 0 0 3px #3b82f633;
}