fade in opacity css code example

Example 1: css fade in

/* Just add .fade-in class to element */

.fade-in {
	animation: fadeIn 2s;
  	opacity: 1;
}

@keyframes fadeIn {
  from {
  	opacity: 0;
  }
  to {
 	opacity: 1;
  }
}

Example 2: css opacity transition

div {
  transition: opacity seconds;
}