CSS-only slider toggle input

slider.css

input {
  display: none;
}

label {
  position: relative;
  display: flex;
  align-items: center;
  width: 200px;
  height: 30px;
  overflow: hidden;
  
  border: 1px solid grey;
  border-radius: 5px;
  
  background-color: rgba(180, 180, 180, 0.6);
  font-family: system-ui;
  color: white;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);

  user-select: none;
}

.label {
  flex: 1 0 0;
  text-align: center;
}

/* "highlight" box -- box-shadow will set the overlay */
label:after {
  content: '';
  position: absolute;
  flex: 1 0 0;
  height: 100%;
  width: 50%;
  box-sizing: border-box;
  
  border: 1px solid rgba(0, 0, 0, 0.6);
  border-radius: 5px;
  box-shadow: 0px 0px 0px 100vw rgba(0, 0, 0, 0.3);
  
  transition: transform 250ms ease;
  transform: translateX(0);
}
/* selected checkbox style */
input[type="checkbox"]:checked+label:after{
  transform: translateX(100%);
}

slider.html

<input type="checkbox" id="toggler" name="isInviting" />
<label for="toggler">
  <span class="label">Share</span>
  <span class="label">Invite</span>
</label>