<div>
  <input id="toggle" type="checkbox">
  <label for="toggle"></label>
</div>

body {
  align-items: center;
  background: #E5E5E5;
  display: flex;
  justify-content: center;
}

label {
  background: white;
  border-radius: 12px;
  box-shadow: 0px 50px 20px 0 rgba(0,0,0,0.1);
  display: flex;
  height: 50px;
  margin-top: 50px;
  padding: 8px;
  position: relative;
  transform: scale(2);
  transition: transform 300ms ease, box-shadow 300ms ease;
  width: 116px;
}

input {
  display: none;
}

label:after {
  animation: move-left 400ms;
  background: #E2E2E2 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='27' height='27' viewBox='0 0 24 24'%3E%3Cpath stroke='#E2E2E2' fill='#E2E2E2' stroke-linecap='round' d='M20.285 2l-11.285 11.567-5.286-5.011-3.714 3.716 9 8.728 15-15.285z'/%3E%3C/svg%3E") no-repeat center;
  border-radius: 12px;
  content: '';
  height: 50px;
  left: 8px;
  outline: none;
  position: absolute;
  transition: background 100ms linear;
  width: 50px;
}

label:active {
  box-shadow: 0px 10px 20px 0 rgba(0,0,0,0.2);
  transform: scale(1.8);
}

input:checked + label:after {
  animation: move-right 400ms;
  background: #6EB54E url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='27' height='27' viewBox='0 0 24 24'%3E%3Cpath stroke='white' fill='white' stroke-linecap='round' d='M20.285 2l-11.285 11.567-5.286-5.011-3.714 3.716 9 8.728 15-15.285z'/%3E%3C/svg%3E") no-repeat center;
  left: 72px;
}

/* Animation */

@keyframes move-right {
  0% {
    left: 8px;
  }
  75% {
    left: 78px;
  }
  100% {
    left: 72px;
  }
}

@keyframes move-left {
  0% {
    left: 72px;
  }
  75% {
    left: 2px;
  }
  100% {
    left: 8px;
  }
}