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How to create transition between images with CSS transition? [duplicate]

I want to fade between images in a loop (like result here-jsfiddle.net/5M2PD) but purely through CSS, no JavaScript. I tried using key-frames but I wasn't successful. Please Help.
#keyframes cf3FadeInOut {
0% {
opacity:1;
}
45% {
opacity:1;
}
55% {
opacity:0;
}
100% {
opacity:0;
}
}
#cf3 img.top {
animation-name: cf3FadeInOut;
animation-timing-function: ease-in-out;
animation-iteration-count: infinite;
animation-duration: 10s;
animation-direction: alternate;
}

I have taken your fiddle as a base, and made it work without script.
updated demo
I needed to set an id to the HTML
.fadein img {
position:absolute;
top:0;
-webkit-animation-name: fade;
-webkit-animation-iteration-count: infinite;
-webkit-animation-duration: 6s;
animation-name: fade;
animation-iteration-count: infinite;
animation-duration: 6s;
}
#-webkit-keyframes fade {
0% {opacity: 0;}
20% {opacity: 1;}
33% {opacity: 1;}
53% {opacity: 0;}
100% {opacity: 0;}
}
#keyframes fade {
0% {opacity: 0;}
20% {opacity: 1;}
33% {opacity: 1;}
53% {opacity: 0;}
100% {opacity: 0;}
}
#f1 {
background-color: lightblue;
}
#f2 {
-webkit-animation-delay: -4s;
background-color: yellow;
}
#f3 {
-webkit-animation-delay: -2s;
background-color: lightgreen;
}
<div class="fadein">
<img id="f3" src="http://i.imgur.com/R7A9JXc.png">
<img id="f2" src="http://i.imgur.com/D5yaJeW.png">
<img id="f1" src="http://i.imgur.com/EUqZ1Er.png">
</div>
I am setting the keyframes to give aprox 1/3 of the time visible, with apropiate transitions.
Then I set different delays for every image, so that they alternate.
If you want full browser support, you will need more vendor prefixes. I have used -webkit- and bare property so that you get the idea.

I've made a dynamic solution with SASS. It's possible to configure:
Total animation time
Amount of items
Transition speed
It automatically calculates the keyframe percentages and delays between items.
Codepen.io demo
// Demo styles
.fadecycle div {
opacity: 0;
position: absolute;
width: 200px;
line-height: 200px;
text-align: center;
}
.fadecycle div:nth-child(1) { background: lightsalmon; }
.fadecycle div:nth-child(2) { background: lightsteelblue; }
.fadecycle div:nth-child(3) { background: lightseagreen; }
.fadecycle div:nth-child(4) { background: lightskyblue; }
// Animation settings
$totalTime: 8s;
$items: 4;
$transitionSpeed: 1.5;
// Calculate transition + display time in seconds
$transitionTime: 0s + $totalTime / ($items * $transitionSpeed * 2);
$displayTime: (0s + $totalTime - ($transitionTime * $items)) / $items;
// Set transition for each element
#for $i from 1 through $items {
.fadecycle div:nth-child(#{$i}) {
// Delay is increased for each item
// starting with an offset of -$transitionTime so the first element is displayed on load
$delay: -$transitionTime + ($transitionTime + $displayTime) * ($i - 1);
animation: fadeinout $totalTime linear $delay infinite;
}
}
// Calculate percentages of the times for keyframes
$transitionPercentage: 0% + 100 * ($transitionTime / $totalTime);
$displayPercentage: 0% + 100 * ($displayTime / $totalTime);
#keyframes fadeinout {
0% {
opacity: 0;
}
#{$transitionPercentage},
#{$transitionPercentage + $displayPercentage} {
opacity: 1;
}
#{$transitionPercentage + $displayPercentage + $transitionPercentage},
100% {
opacity: 0;
}
}

Depending on how many images you want, how long you want each image to display, and how long you want the fade transition to last, you will need different values for your keyframes each time. A helpful post on how to do it properly each time can be found here: https://www.devtwins.com/blog/css-cross-fading-images

Here is another site to teach cross fading image , both time based and event based, with relatively small CSS:
http://css3.bradshawenterprises.com/cfimg/

CSS Animation fadeOut / fadeIn for JS Popup

I want create an fadeIn and fadeOut effect for my JS popup window in css.
fadeIn works fine but not the fadeOut effect, i dont know how i must change my JS time, i have tried some things, but if i use both, fideIn and fadeOut in CSS, the Popup just flashing.
But i want an 5 seconds effect for both and with an delay of also 5 seconds to show the popup.
CSS fadeIn:
.fadeInclass {
animation: fadeIn ease 5s;
-webkit-animation: fadeIn ease 5s;
-moz-animation: fadeIn ease 5s;
-o-animation: fadeIn ease 5s;
-ms-animation: fadeIn ease 5s;
}
#keyframes fadeIn{
0% {
opacity:0;
}
100% {
opacity:1;
}
}
#-moz-keyframes fadeIn {
0% {
opacity:0;
}
100% {
opacity:1;
}
}
#-webkit-keyframes fadeIn {
0% {
opacity:0;
}
100% {
opacity:1;
}
}
#-o-keyframes fadeIn {
0% {
opacity:0;
}
100% {
opacity:1;
}
}
#-ms-keyframes fadeIn {
0% {
opacity:0;
}
100% {
opacity:1;
}
}
JS:
var div = document.getElementById("show-popup");
var showFlag = true;
var myIntv = setInterval(function() {
if(showFlag){
div.style.display = 'block';
showFlag = false;
}
else{
div.style.display = 'none';
showFlag = true;
}
}, 5 * 1000);
Whats the best way to add the fadeIn and fadeOut effect, with js or CSS animation?
5 seconds fadeIn effect, then stay for 5 seconds and again 5 seconds fadeOut.

You could use a single animation to achieve all of this.
The first 5 seconds fades in the control, it stays fully visible for 5 seconds, and then fades out for 5 seconds.
.fadeInclass {
animation: fadeIn ease 15s;
background-color: red;
height: 50px;
opacity: 0;
width: 50px;
}
#keyframes fadeIn{
0% {
opacity:0;
}
33% {
opacity:1;
}
66% {
opacity:1;
}
100% {
opacity:0;
}
}
<div class="fadeInclass"></div>

You could simply use CSS transition with opacity:
#popup{
opacity: 0;
transition: ease opacity 5s;
}
#popup.fadeInclass{
opacity: 1;
}
And then just add/remove the .fadeInClass to your element in JS to achieve the desired goal:
function showPopup(){
var div = document.getElementById("popup");
div.style.display = 'block';
div.classList.add("fadeInclass");
}
function hidePopup(){
var div = document.getElementById("popup");
div.classList.remove("fadeInclass");
setTimeout(function(){
div.style.display = 'none';
}, 5000);
}

Crossfade background images in a body

I have the next problem: I want to crossfade different background images of a <body> tag, with a timer. You can see here an example of what I want to achieve.
The problem is that I'm new to these stuff and can't figure out how to do it...I've seen many post, but they only made me get more confused!
my HTML code:
<body id="one" onload="startTimer()">
<!-- Some other tags -->
</body>
<script type = "text/javascript">
function displayNextImage() {
x = (x === images.length - 1) ? 0 : x + 1;
var url = "url(" + images[x] + ")";
$("#one").css('background-image', url);
}
function startTimer() {
setInterval(displayNextImage, 6000);
}
var images = [], x = -1;
images[0] = "someimage1.jpg";
images[1] = "someimage2.jpg";
images[2] = "someimage3.jpg";
</script>
and my CSS code:
body {
background-image: url("images/forest1.jpeg");
background-size: cover;
}
I'm open to suggestions, I mean, if there's a better way to do these, great! I just want to get the same point as the web shown above!
Thanks in advance!

You don't need any JavaScript, you can achieve it with CSS animations:
body {
background-size: cover;
}
#-webkit-keyframes changeBckg {
0% { background-image: url("https://unsplash.it/1000?image=1080"); }
25% { background-image: url("https://unsplash.it/1000?image=1081"); }
50% { background-image: url("https://unsplash.it/1000?image=1064"); }
75% {background-image: url("https://unsplash.it/1000?image=1078"); }
100% {background-image: url("https://unsplash.it/1000?image=1080"); }
}
#keyframes changeBckg {
0% { background-image: url("https://unsplash.it/1000?image=1080"); }
25% { background-image: url("https://unsplash.it/1000?image=1081"); }
50% { background-image: url("https://unsplash.it/1000?image=1064"); }
75% {background-image: url("https://unsplash.it/1000?image=1078"); }
100% {background-image: url("https://unsplash.it/1000?image=1080"); }
}
.letterAnimation {
-webkit-animation: changeBckg 16s ease infinite;
animation: changeBckg 16s ease infinite;
}
<body class="letterAnimation">
</body>

A simple CSS only solution, it works using CSS animations #keyframes; You can apply the same code to the body of your html page.
#keyframes cf4FadeInOut {
0% {
opacity: 1;
}
17% {
opacity: 1;
}
25% {
opacity: 0;
}
92% {
opacity: 0;
}
100% {
opacity: 1;
}
}
#cf4a img:nth-of-type(1) {
animation-delay: 6s;
}
#cf4a img:nth-of-type(2) {
animation-delay: 4s;
}
#cf4a img:nth-of-type(3) {
animation-delay: 2s;
}
#cf4a img:nth-of-type(4) {
animation-delay: 0;
}
#cf4a img {
position: absolute;
top: 0;
left: 0;
animation: cf4FadeInOut 5s infinite;
}
<div id="cf4a" class="shadow cf4FadeInOut">
<img src="https://placeimg.com/150/150/01">
<img src="https://placeimg.com/150/150/02">
<img src="https://placeimg.com/150/150/03">
<img src="https://placeimg.com/150/150/04">
</div>

Banner rotation in JavaScript with animation using CSS3

I have to write a simple HTML banner rotator in JavaScript with animated transition using CSS3. I came with this:
HTML:
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="css/banner.css" type="text/css" />
<script type="text/javascript" src="scripts/banner.js"></script>
</head>
<body>
<div><img src="img/banner1.jpg" alt="" id="banner" /></div>
<script>window.onload = rotateAnimation('banner', 5000);</script>
</body>
</html>
CSS:
#banner {
animation-name: myfirst;
animation-duration: 5s;
animation-timing-function: linear;
animation-delay: 0s;
animation-iteration-count: infinite;
animation-direction: alternate;
animation-play-state: running;
}
#keyframes myfirst {
0% {opacity: 0;}
10% {opacity: 1;}
90% {opacity: 1;}
100% {opacity: 0;}
}
JavaScript:
var i = 0;
var banners = new Array("img/banner1.jpg", "img/banner2.jpg", "img/banner3.jpg");
function rotateAnimation(el, speed) {
var elem = document.getElementById(el);
elem.src = banners[i];
setTimeout('rotateAnimation(\''+el+'\','+speed+')',speed);
i++;
if(i === banners.length) i = 0;
}
But as I expected, the animation desynchronise itself and I don't know how to make this on one timer only.

It didn't need an CSS3 animation. All it needed was JS script that change images and CSS3 trasition property. Didn't know that transitions work if JS is changing something.

How to pause and resume CSS3 animation using JavaScript?

I've tried to google and look from this forum a solution for my problem but no luck so far. I would like to pause my CSS3 animation (image slide show) by clicking a picture and also resume to the same animation by clicking a picture.
I know how to pause the slide show and I was also able to resume it once, but then it stops working if try to pause and resume more than one time. Here is how my code looks like:
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.pic {
position: absolute;
opacity: 0;
}
#pic1 {
-webkit-animation: pic1 4s infinite linear;
}
#pic2 {
-webkit-animation: pic2 4s infinite linear;
}
#-webkit-keyframes pic1 {
0% {opacity: 0;}
5% {opacity: 1;}
45% {opacity: 1;}
50% {opacity: 0;}
100% {opacity: 0;}
}
#-webkit-keyframes pic2 {
0% {opacity: 0;}
50% {opacity: 0;}
55% {opacity: 1;}
95% {opacity: 1;}
100% {opacity: 0;}
}
</style>
<script type="text/javascript">
function doStuff(){
var pic1 = document.getElementById("pic1");
var pic2 = document.getElementById("pic2");
pic1.style.webkitAnimationPlayState="paused";
pic2.style.webkitAnimationPlayState="paused";
pic1.onclick = function(){
pic1.style.webkitAnimationPlayState="running";
pic2.style.webkitAnimationPlayState="running";
}
pic2.onclick = function(){
pic1.style.webkitAnimationPlayState="running";
pic2.style.webkitAnimationPlayState="running";
}
}
</script>
</head>
<body>
<img id="pic1" class="pic" src="photo1.jpg" />
<img id="pic2" class="pic" src="photo2.jpg" onclick="doStuff()" />
</body>
</html>
I don't want to use any JS libraries (e.g. jQuery) or any other external solution.
My guess is that my functions inside doStuff function are still running and that's why pause and resume works only once.
Is there a way to clear these functions after I have clicked them once? Or am I trying to do this in a totally wrong way? Help is appreciated. :)

I find it easier to do it with a css class. With it, you can use prefixes for every browser.
.paused{
-webkit-animation-play-state:paused;
-moz-animation-play-state:paused;
-o-animation-play-state:paused;
animation-play-state:paused;
}
Then you only have to add or remove this class to your animated element yo pause / resume the animation.

Here is a solution using javascript:
var imgs = document.querySelectorAll('.pic');
for (var i = 0; i < imgs.length; i++) {
imgs[i].onclick = toggleAnimation;
imgs[i].style.webkitAnimationPlayState = 'running';
}
function toggleAnimation() {
var style;
for (var i = 0; i < imgs.length; i++) {
style = imgs[i].style;
if (style.webkitAnimationPlayState === 'running') {
style.webkitAnimationPlayState = 'paused';
document.body.className = 'paused';
} else {
style.webkitAnimationPlayState = 'running';
document.body.className = '';
}
}
}
.pic {
position: absolute;
opacity: 0;
}
#pic1 {
-webkit-animation: pic1 4s infinite linear;
}
#pic2 {
-webkit-animation: pic2 4s infinite linear;
}
#-webkit-keyframes pic1 {
0% {
opacity: 0;
}
5% {
opacity: 1;
}
45% {
opacity: 1;
}
50% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-webkit-keyframes pic2 {
0% {
opacity: 0;
}
50% {
opacity: 0;
}
55% {
opacity: 1;
}
95% {
opacity: 1;
}
100% {
opacity: 0;
}
}
.paused {
background-color: #ddd;
}
<img id="pic1" class="pic" src="http://placehold.it/200x200/ff0000/ffffff">
<img id="pic2" class="pic" src="http://placehold.it/200x200/ff00ff/ffffff">
jQuery solution (shorter and more readable):
var imgs = $('.pic'),
playState = '-webkit-animation-play-state';
imgs.click(function() {
imgs.css(playState, function(i, v) {
return v === 'paused' ? 'running' : 'paused';
});
$('body').toggleClass('paused', $(this).css(playState) === 'paused');
});
.pic {
position: absolute;
opacity: 0;
}
#pic1 {
-webkit-animation: pic1 4s infinite linear;
}
#pic2 {
-webkit-animation: pic2 4s infinite linear;
}
#-webkit-keyframes pic1 {
0% {
opacity: 0;
}
5% {
opacity: 1;
}
45% {
opacity: 1;
}
50% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-webkit-keyframes pic2 {
0% {
opacity: 0;
}
50% {
opacity: 0;
}
55% {
opacity: 1;
}
95% {
opacity: 1;
}
100% {
opacity: 0;
}
}
.paused {
background-color: #ddd;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img id="pic1" class="pic" src="http://placehold.it/200x200/ff0000/ffffff">
<img id="pic2" class="pic" src="http://placehold.it/200x200/ff00ff/ffffff">

This is to extend the answer given by Luis Hijarrubia
.pause {
-webkit-animation-play-state: paused !important;
-moz-animation-play-state: paused !important;
-o-animation-play-state: paused !important;
animation-play-state: paused !important;
}
In my page I was triggering the change of class from the parent element. All I wanted to do was rotate the image inside. But it seems that because I was not using the hover, the adding of the paused class made no difference to the animation state.
The use of !important ensured that these values were overwritten by the new added CSS values.

var e = document.getElementsById("Your_Id");
e.addEventListener("animationstart", listener, false);
e.addEventListener("animationend", listener, false);
e.addEventListener("animationiteration", listener, false);
function listener(e) { alert("Your POSITION parameter:" + .target.style.position);
switch(e.type) {
case "animationstart":
d = "Started: elapsed time is " + e.elapsedTime;
break;
case "animationend":
d = "Ended: elapsed time is " + e.elapsedTime;
break;
case "animationiteration":
d= "New loop started at time " + e.elapsedTime; alert("pausing for 1 seconddddddd!!!!!!!"); e.target.style.animationPlayState = "paused"; window.setTimeout(function(){e.target.style.animationPlayState = "running";}, 1000);
break;
}
}

I havent tested it but perhaps something like this?
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.pic { position: absolute;opacity: 0; }
.pic1 { -webkit-animation: pic1 4s infinite linear; }
.pic2 { -webkit-animation: pic2 4s infinite linear; }
#-webkit-keyframes pic1 { 0% {opacity: 0;}
5% {opacity: 1;}
45% {opacity: 1;}
50% {opacity: 0;}
100% {opacity: 0;} }
#-webkit-keyframes pic2 { 0% {opacity: 0;}
50% {opacity: 0;}
55% {opacity: 1;}
95% {opacity: 1;}
100% {opacity: 0;} }
</style>
<script type="text/javascript">
function doStuff(){
var pic1 = document.getElementById("pic1");
var pic2 = document.getElementById("pic2");
pic1.className="pic paused";
pic2.className="pic paused";
pic1.onclick = function(){
pic1.className="pic pic1";
pic2.className="pic pic2";
}
pic2.onclick = function(){
pic1.className="pic pic1";
pic2.className="pic pic2";
}
}
</script>
</head>
<body>
<img id="pic1" class="pic pic1" src="photo1.jpg" />
<img id="pic2" class="pic pic2" src="photo2.jpg" onclick="doStuff()" />
</body>
</html>