Not seeing the square links with javascript disabled

Can you help me understand this?

.inactive .cover {
  display: block;
}
.fhgfjhfhgfhgd .cover {
  display: block;
}

.inactive

Has no meaning at all, it’s just a dead class name attached to .cover?

It seems like it has no meaning to it other than, being able to show the links when the javascript is removed.