Not seeing the square links with javascript disabled

JavaScript
36

It goes all the way back to figuring out the the sole purpose of what these codes were meant to do.
#300

That’s what @PaulOB put in the code.
#182

I was figuring out what these were meant for:

.title{display:none;}
.inactive .title{display:block;}

.cover {
  display: none;
}
.inactive .cover {
  display: block;
}

It’s meant for when javascript is disabled.

I got it working on 3 out of the 4 codes.
Stuck only on implementing it on Code 1.