how to make an image fade in css3 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: how to fade out images html css

.fade-out {  animation: fadeOut ease 8s;  -webkit-animation: fadeOut ease 8s;  -moz-animation: fadeOut ease 8s;  -o-animation: fadeOut ease 8s;  -ms-animation: fadeOut ease 8s;}@keyframes fadeOut {  0% {    opacity:1;  }  100% {    opacity:0;  }}@-moz-keyframes fadeOut {  0% {    opacity:1;  }  100% {    opacity:0;  }}@-webkit-keyframes fadeOut {  0% {    opacity:1;  }  100% {    opacity:0;  }}@-o-keyframes fadeOut {  0% {    opacity:1;  }  100% {    opacity:0;  }}@-ms-keyframes fadeOut {  0% {    opacity:1;  }  100% {    opacity:0;}