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Obtaining a smooth transition in an image slider animation

THE AIM
Obtain a smoother transition between images. At the moment I have a white background between images for a few milliseconds.
THE PROBLEM
Apparently I cannot properly replicate this part of my code as I don't think you can use links in background-image: url(...). In my actual code, I'm using relative paths.
The problem is the white background between picture transition when they first load and are not save in the cache. When starting again the slider, the transition is smoother, i.e. the white background is not shown.
SUMMARY
I would like to obtain a smoother transition between pictures when they first load and are not save in the cache. How could this be done? (jQuery is also welcomed)
h1 {
display: flex;
justify-content: center;
margin: 20vh 0;
background-color: lightblue;
padding: 50px;
}
#keyframes slide {
0% {
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
}
25% {
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
}
25.01% {
background-image: url("https://image.shutterstock.com/image-photo/micro-peacock-feather-hd-imagebest-260nw-1127238584.jpg");
}
50% {
background-image: url("https://image.shutterstock.com/image-photo/micro-peacock-feather-hd-imagebest-260nw-1127238584.jpg");
}
50.1% {
background-image: url("https://images.pexels.com/photos/326055/pexels-photo-326055.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500");
}
75% {
background-image: url("https://images.pexels.com/photos/326055/pexels-photo-326055.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500");
}
75.1% {
background-image: url("https://media3.s-nbcnews.com/j/newscms/2019_41/3047866/191010-japan-stalker-mc-1121_06b4c20bbf96a51dc8663f334404a899.fit-760w.JPG");
}
100% {
background-image: url("https://media3.s-nbcnews.com/j/newscms/2019_41/3047866/191010-japan-stalker-mc-1121_06b4c20bbf96a51dc8663f334404a899.fit-760w.JPG");
}
}
.slider {
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
animation: slide 30s infinite;
}
.load {
animation: slide 2s;
}
<div class="slider"></div>
<div class="load"></div>
<h1>SOME CONTENT</h1>
UPDATE
The images are now shown as <div class="slider"></div> was missing before. This was pointed out in the first answer below. However, the white background between images is still there.

Your slider and load divs didn't show because there was nothing in them to begin with and no default height specified in the css. I have given the slider a height of 30vh and a width of 100% (I went with that one for demo purposes). I reduced the margin/padding around the h1 (there's a lot!) just so you could see the images better in the snippet. Still might be viewed better full screen.
I added an animation timing (ease-in-out) to the css to make the start and end of the animation slower to make the transition seem a little easier on the eye. The default is ease which makes it fast in the middle; by changing the transition speed, your animation may appear a little smoother.
Hope this helps
h1 {
display: flex;
justify-content: center;
margin: 2vh 0;
background-color: lightblue;
padding: 15px;
}
#keyframes slide {
0% {
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
}
25% {
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
}
25.01% {
background-image: url("https://image.shutterstock.com/image-photo/micro-peacock-feather-hd-imagebest-260nw-1127238584.jpg");
}
50% {
background-image: url("https://image.shutterstock.com/image-photo/micro-peacock-feather-hd-imagebest-260nw-1127238584.jpg");
}
50.1% {
background-image: url("https://images.pexels.com/photos/326055/pexels-photo-326055.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500");
}
75% {
background-image: url("https://images.pexels.com/photos/326055/pexels-photo-326055.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500");
}
75.1% {
background-image: url("https://media3.s-nbcnews.com/j/newscms/2019_41/3047866/191010-japan-stalker-mc-1121_06b4c20bbf96a51dc8663f334404a899.fit-760w.JPG");
}
100% {
background-image: url("https://media3.s-nbcnews.com/j/newscms/2019_41/3047866/191010-japan-stalker-mc-1121_06b4c20bbf96a51dc8663f334404a899.fit-760w.JPG");
}
}
.slider {
display:inline-block;
background-image: url("https://s.ftcdn.net/v2013/pics/all/curated/RKyaEDwp8J7JKeZWQPuOVWvkUjGQfpCx_cover_580.jpg?r=1a0fc22192d0c808b8bb2b9bcfbf4a45b1793687");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
animation: slide 5s ease-in-out infinite;
height:30vh;
width:100%;
}
.load {
animation: slide 5s infinite;
}
<h1>SOME CONTENT</h1>
<div class="slider"></div>

How can i make a gradient background without changing background size? [duplicate]

I am creating an interactive touchscreen display using a program called Intuiface and have created some background tiles/squares that I want to make look 'alive' by transitioning slowly between colours.
I have used a linear-gradient transition in CSS to do it but the problem is that the transition looks choppy. The program is running 12 visible tiles (it is a very large touchscreen).
I have tried using fewer colours and running on more powerful GPUs (I think it is CPU run anyway) but this hasn't helped.
body {
width: 100wh;
height: 90vh;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
background-size: 400% 400%;
animation: Gradient 15s ease infinite;
}
#keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
At the moment the animations are noticeably choppy. I would like the transition to be much smoother. Does anyone know how I can achieve this?
Here is the code snippet.
body {
width: 100wh;
height: 90vh;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
background-size: 400% 400%;
animation: Gradient 15s ease infinite;
}
#keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
<html>
<body>
</body>
</html>

Animating background-* properties can be resource intensive - you can try animating transform for relatively better performance - see demo below using traslate for the animation:
body {
margin: 0;
}
div {
height: 100vh;
overflow: hidden;
}
div:after {
content: '';
display: block;
width: 400vw;
height: 400vh;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
animation: gradient 15s ease infinite;
}
#keyframes gradient {
50% {
transform: translate(-300vw, -300vh);
}
}
<div></div>

Since your animation lasts 15 seconds, trying to run it at full 60fps would mean calculating 15*60 = 900 frames.
Since the difference between a frame and the next is quite small, you can make the CPU work quite less asking for a stepped animation, for instance with steps(75)
It could be also good to set slight delays between animations, so that they don't execute at the same time
body {
width: 100wh;
height: 90vh;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
background-size: 400% 400%;
animation: Gradient 15s infinite steps(75);
}
#keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
<html>
<body>
</body>
</html>

How can the roll over effect of one image again and again can be achieved in javascript?

We need to create a screensaver where image should roll over again and again continuously to the left. We coded as shown below.
<!DOCTYPE html>
<html>
<head>
<title>test</title>
<style>
.animator {
background-image: url(https://upload.wikimedia.org/wikipedia/commons/3/33/Jordansallotments.jpg);
animation: move-background 2s linear infinite;
position: absolute;
width: 100%;
height: 100%;
}
html,
body {
position: relative;
width: 100%;
height: 100%;
}
#keyframes move-background {
0% {
background-position: 0%, 0%;
}
100% {
background-position: 100%, 0%;
}
}
</style>
</head>
<body>
<div class="animator"></div>
</body>
</html>
The image is rolling over again and again as expected but every 2seconds, we are getting flickering effect. Please see the demo here.
As a fiddle
Can any one please help me to fix this or is there any way to achieve the effect of rolling one image over and over continuously using javascript?
I tried with javascript as below.
<script type="text/javascript">
var bdg_img = document.getElementById('bdgimg');
var animate;
function moveRight()
{
bdg_img.style.left = bdg_img.style.left || 0;
bdg_img.style.left = parseInt(bdg_img.style.left) + 10 + 'px';
animate = setTimeout(moveRight,40); // call moveRight in 20msec
}
moveRight();
</script>
But this is only moving the image to right. The image is not rolling over.

The percentage value in background-position: xxx% is relative to the element's size, not to your actual image's.
So if you want to keep the original background-image-size, you will have to set this background-position relative to your media's size:
.animator {
background-image: url(https://upload.wikimedia.org/wikipedia/commons/3/33/Jordansallotments.jpg);
background-position: 0% 50%;
animation: move-background 2s linear infinite;
width: 100vw;
height: 100vh;
}
#keyframes move-background {
to {
/* the image is 1225*800px */
background-position: -1225px 50%;
}
}
<div class="animator"></div>
Also note that when you do
background-position: 100%, 0%;
You are actually setting two background-position rules, which would be used only if you did set two background-image rules, and is indeed a short-hand for :
background-position-x: 100%, 0%;
background-position-y: 100%, 0%;

you can use very long animation time and repeat background to produce the effect.
*this animation play more than 10day (and may flicker once), but you can make it longer if you want.
*of course you can do the same thing (modify the style) in javascript by setInterval or alike. and have real infinity duration (at least until it reach numeric limit).
.canvas{
width: 300px;
height: 100px;
background-image: url(https://upload.wikimedia.org/wikipedia/commons/3/33/Jordansallotments.jpg);
background-size: auto 100%;
background-repeat: repeat-x;
animation: move-background 1000000s linear infinite;
}
#keyframes move-background {
0% {
background-position: 0 0;
}
100% {
background-position: -20000000px 0;
}
}
<div class="canvas"></div>

How To Move/Animate A DIV Background Image Smoothly Vertical?

I have a DIV with some text in it. I added a background image on it. Now I want to keep scrolling my DIV background image from bottom to top smoothly. For this purpose, I searched for the code and I found some codes...
<style type="text/css">
#moving_bg {
background-image:url('http://i.imgur.com/zF1zrkC.jpg');
background-repeat:repeat-y;
color:#FFFFFF;
width:1000px;
height:300px;
text-align:center;
}
</style>
<div id="moving_bg">
<h2>This is my DIV text that I want do not want to move/animate.</h2>
</div>
CODE 1:) http://jsfiddle.net/ZTsG9/1/ This is a code that I found but this one have some problems with me. First of all its moving horizontally and second is that its making image width doubled to 200% that I dont want also.
CODE 2:) http://jsfiddle.net/hY5Dx/3/ This one is also moving horizontally and not making the image width doubled. But its JQuery that I dont want.
I want only CSS3 or JavaScript with HTML code to move my background image in DIV from bottom to top without doubling the image width. Is this possible in these two web languages...???

If you can get away with using 2 divs you can get it to work like this:
Working Example
html, body {
height: 100%;
margin: 0;
}
.outer {
height:100%;
overflow: hidden; /* hide the overflow so .inner looks like it fits in the window*/
}
.inner {
height:200%; /* the inner div will need to be twice as tall as the outer div */
width:100%;
-webkit-animation:mymove 5s linear infinite;
animation:mymove 5s linear infinite;
background-image: url('http://static1.360vrs.com/pano-content/judith-stone-at-sunset-east-farndon/640px-360-panorama.jpg');
background-size: 100% 50%; /* 50% height will be 100% of the window height*/
}
#-webkit-keyframes mymove {
from {
background-position: 0% 0%;
}
to {
background-position: 0% -100%;
}
}
#keyframes mymove {
from {
background-position: 0% 0%;
}
to {
background-position: 0% -100%;
}
}

As per Muhammad's request i'll add my fiddle as an answer.
VanillaJS using requestAnimationFrame for that butter smooth slide :)
http://jsfiddle.net/hY5Dx/103/
Code to please SO:
var y = 0;
requestAnimationFrame(move);
var body = document.body;
function move(){
y++;
body.style.backgroundPosition = '0 ' + y + 'px';
requestAnimationFrame(move);
}

As there is too much comments after #Skynet answer, here I add the one I wrote following his base structure.
So in CSS, you can make use of animation CSS property
This property still is vendor-prefixes dependant.
Basically for what you want to do, you have to animate the background-position property, only on y axis.
Here is the CSS code
/* Following defines how the animation 'mymove' will run */
#keyframes mymove {
/* 0% is the beginning of animation */
0% {
background-position: 0 0;
}
/* This is the end… where we set it to the size of the background image for y axis (0 being the x axis) */
100% {
background-position: 0 860px;
}
}
/* same for webkit browsers */
#-webkit-keyframes mymove {
0% {
background-position: 0 0;
}
100% {
background-position: 0 860px;
}
html, body {
height: 100%;
}
.view {
color:#FFFFFF;
height: 366px;
text-align:center;
/* Here we assign our 'mymove' animation to the class .view, we ask it to last 3 seconds, linearly (no ease at start or end), and repeating infinitely */
animation: mymove 5s linear infinite;
/* again webkit browsers */
-webkit-animation:mymove 5s linear infinite;
background: url('http://i.imgur.com/zF1zrkC.jpg');
}
And here we are.
The other answers are ok but as mentionned, using multiple divs isn't always possible and the use of requestAnimationFrame() is also browser specific (Paul Irish has good polyfill for this).
Furthermore, I'm not sure incrementing a var infinitely is a good solution : it will block near 6100000px, and its much more code to change the speed or to take control over the animation.

<div class="view" style="background-image: url('http://i.imgur.com/zF1zrkC.jpg')">According to a new report from AnandTech.</div>
html, body {
height: 100%;
}
.view {
color:#FFFFFF;
width:1000px;
height:300px;
text-align:center;
-webkit-animation:mymove 5s linear infinite;
/* Safari and Chrome */
animation:mymove 5s linear infinite;
background-size: 200% 100%;
background-repeat: repeat-y;
}
#keyframes mymove {
100% {
transform: translate3d(0px, -400px, 0px);
}
}
#-webkit-keyframes mymove
/* Safari and Chrome */
{
100% {
transform: translate3d(0px, -400px, 0px);
}
}
check jsfiddle

how do I add a custom css3 animation but also a transition on hover?

I have set up a basic CSS3 animation test which increases and decreases the background-size of the element, when you click one of the elements then the class active is toggled and a transition occurs. My problem is though that when the .active class is removed the animation doesnt occur anymore since I have reset animation to none. Can anyone advise how I can fix this problem?
CSS
html{height:100%;}
body {background:#000;height:100%;min-height:100%;padding:20px}
ul{height:100%;display:block}
li{float:left;margin-right:30px;position:relative;}
#-webkit-keyframes throb_outer {
0% { background-size:1px 100%; }
100% { background-size:1px 130%; }
}
#-webkit-keyframes throb_inner {
0% { background-size:1px 100%; }
100% { background-size:1px 115%; }
}
.outer{display:block;width:50px;padding:0 1px;cursor: pointer;
-webkit-animation: throb_outer 2s infinite alternate;
}
.b{background: -webkit-linear-gradient(black 30%, rgba(41,184,229,1) 50%, black 70%) repeat-x; }
.g{background: -webkit-linear-gradient(black 20%, rgba(33, 130, 61, 1) 50%, black 80%) repeat-x;}
.r{background: -webkit-linear-gradient(black 40%, rgba(255,0,0,1) 50%, black 60%) repeat-x;}
.li{height:100%;-webkit-transition: background-size .3s linear;
background-position:0 50%;
background-size:1px 100%;}
.inner{
width:100%;
display:block;
-webkit-animation: throb_inner 2s infinite alternate;
}
.outer.active{-webkit-animation:none;background-size:1px 200%;}
.outer.active .inner{-webkit-animation:none;background-size:1px 150%;}
​
JS
$(document).ready(function() {
$('#test').children().on('click', function(e) {
$(this).toggleClass('active');
});
});
Fiddle here: http://jsfiddle.net/VQaGh/22/

as my understanding you want effects something like this
try this one http://jsfiddle.net/Sk2sX/
I have modify both css and js hope it will help you
for any query regarding code post a comment