Animating background position on hover - javascript

Can anyone give me some advises;
on the best way to create buttons with animated background position on hover.
Like the buttons on this page, about us, make a donation etc
http://nationallgbtmuseum.org/#/home/
many thanks for your input.

You could make use of some CSS3 animation to achieve this.
One way of doing this is below. View this snippet in a webkit based browser like Chrome. You can adapt this for cross-browser by adding vendor-prefixes and the standard one.
Snippet:
div {
width: 240px; height: 240px;
border: 1px solid gray;
background-image: url(http://placehold.it/32/32);
background-position: -640px 640px;
}
div:hover {
-webkit-animation-duration: 20s;
-webkit-animation-name: anim;
-webkit-animation-timing-function: linear ;
-webkit-animation-iteration-count: infinite;
}
#-webkit-keyframes anim {
0% { background-position: -640px 640px; }
100% { background-position: 640px -640px; }
}
<div></div>

Related

change css picture with javascript [duplicate]

Why this isn't working? What am I doing wrong?
CSS
#-webkit-keyframes test {
0% {
background-image: url('frame-01.png');
}
20% {
background-image: url('frame-02.png');
}
40% {
background-image: url('frame-03.png');
}
60% {
background-image: url('frame-04.png');
}
80% {
background-image: url('frame-05.png');
}
100% {
background-image: url('frame-06.png');
}
}
div {
float: left;
width: 200px;
height: 200px;
-webkit-animation-name: test;
-webkit-animation-duration: 10s;
-webkit-animation-iteration-count: 2;
-webkit-animation-direction: alternate;
-webkit-animation-timing-function: linear;
}
DEMO
http://jsfiddle.net/hAGKv/
Updated for 2020: Yes, it can be done! Here's how.
Snippet demo:
#mydiv{ animation: changeBg 1s infinite; width:143px; height:100px; }
#keyframes changeBg{
0%,100% {background-image: url("https://i.stack.imgur.com/YdrqG.png");}
25% {background-image: url("https://i.stack.imgur.com/2wKWi.png");}
50% {background-image: url("https://i.stack.imgur.com/HobHO.png");}
75% {background-image: url("https://i.stack.imgur.com/3hiHO.png");}
}
<div id='mydiv'></div>
Background image [isn't a property that can be animated][1] - you can't tween the property.
Original Answer: (still a good alternative)
Instead, try laying out all the images on top of each other using position:absolute, then animate the opacity of all of them to 0 except the one you want repeatedly.
It works in Chrome 19.0.1084.41 beta!
So at some point in the future, keyframes could really be... frames!
You are living in the future ;)
Works for me.
Notice the use of background-image for transition.
#poster-img {
background-repeat: no-repeat;
background-position: center;
position: absolute;
overflow: hidden;
-webkit-transition: background-image 1s ease-in-out;
transition: background-image 1s ease-in-out;
}
This is really fast and dirty, but it gets the job done: jsFiddle
#img1, #img2, #img3, #img4 {
width:100%;
height:100%;
position:fixed;
z-index:-1;
animation-name: test;
animation-duration: 5s;
opacity:0;
}
#img2 {
animation-delay:5s;
-webkit-animation-delay:5s
}
#img3 {
animation-delay:10s;
-webkit-animation-delay:10s
}
#img4 {
animation-delay:15s;
-webkit-animation-delay:15s
}
#-webkit-keyframes test {
0% {
opacity: 0;
}
50% {
opacity: 1;
}
100% {
}
}
#keyframes test {
0% {
opacity: 0;
}
50% {
opacity: 1;
}
100% {
}
}
I'm working on something similar for my site using jQuery, but the transition is triggered when the user scrolls down the page - jsFiddle
I needed to do the same thing as you and landed on your question. I ended up taking finding about the steps function which I read about from here.
JSFiddle of my solution in action (Note it currently works in Firefox, I'll let you add the crossbrowser lines, trying to keep the solution clean of clutter)
First I created a sprite sheet that had two frames. Then I created the div and put that as the background, but my div is only the size of my sprite (100px).
<div id="cyclist"></div>
#cyclist {
animation: cyclist 1s infinite steps(2);
display: block;
width: 100px;
height: 100px;
background-image: url('../images/cyclist-test.png');
background-repeat: no-repeat;
background-position: top left;
}
The animation is set to have 2 steps and have the whole process take 1 second.
#keyframes cyclist {
0% {
background-position: 0 0;
}
100% {
background-position: 0 -202px; //this should be cleaned up, my sprite sheet is 202px by accident, it should be 200px
}
}
Thiago above mentioned the steps function but I thought I'd elaborate more on it. Pretty simple and awesome stuff.
Your code can work well with some adaptations :
div {
background-position: 50% 100%;
background-repeat: no-repeat;
background-size: contain;
animation: animateSectionBackground infinite 240s;
}
#keyframes animateSectionBackground {
00%, 11% { background-image: url(/assets/images/bg-1.jpg); }
12%, 24% { background-image: url(/assets/images/bg-2.jpg); }
25%, 36% { background-image: url(/assets/images/bg-3.jpg); }
37%, 49% { background-image: url(/assets/images/bg-4.jpg); }
50%, 61% { background-image: url(/assets/images/bg-5.jpg); }
62%, 74% { background-image: url(/assets/images/bg-6.jpg); }
75%, 86% { background-image: url(/assets/images/bg-7.jpg); }
87%, 99% { background-image: url(/assets/images/bg-8.jpg); }
}
Here is the explanation of the percentage to suit your situation:
First you need to calculate the "chunks". If you had 8 differents background, you need to do :
100% / 8 = 12.5% (to simplify you can let fall the decimals) => 12%
After that you obtain that :
#keyframes animateSectionBackground {
00% { background-image: url(/assets/images/bg-1.jpg); }
12% { background-image: url(/assets/images/bg-2.jpg); }
25% { background-image: url(/assets/images/bg-3.jpg); }
37% { background-image: url(/assets/images/bg-4.jpg); }
50% { background-image: url(/assets/images/bg-5.jpg); }
62% { background-image: url(/assets/images/bg-6.jpg); }
75% { background-image: url(/assets/images/bg-7.jpg); }
87% { background-image: url(/assets/images/bg-8.jpg); }
}
If you execute this code, you will see the transition will be permanantly. If you want the backgrounds stay fixed while a moment, you can do like this :
#keyframes animateSectionBackground {
00%, 11% { background-image: url(/assets/images/bg-1.jpg); }
12%, 24% { background-image: url(/assets/images/bg-2.jpg); }
25%, 36% { background-image: url(/assets/images/bg-3.jpg); }
37%, 49% { background-image: url(/assets/images/bg-4.jpg); }
50%, 61% { background-image: url(/assets/images/bg-5.jpg); }
62%, 74% { background-image: url(/assets/images/bg-6.jpg); }
75%, 86% { background-image: url(/assets/images/bg-7.jpg); }
87%, 99% { background-image: url(/assets/images/bg-8.jpg); }
}
That mean you want :
bg-1 stay fixed from 00% to 11%
bg-2 stay fixed from 12% to 24%
etc
By putting 11%, the transtion duration will be 1% (12% - 11% = 1%).
1% of 240s (total duration) => 2.4 seconds.
You can adapt according to your needs.
The linear timing function will animate the defined properties linearly. For the background-image it seems to have this fade/resize effect while changing the frames of you animation (not sure if it is standard behavior, I would go with #Chukie B's approach).
If you use the steps function, it will animate discretely. See the timing function documentation on MDN for more detail. For you case, do like this:
-webkit-animation-timing-function: steps(1,end);
animation-timing-function: steps(1,end);
See this jsFiddle.
I'm not sure if it is standard behavior either, but when you say that there will be only one step, it allows you to change the starting point in the #keyframes section. This way you can define each frame of you animation.
Like the above stated, you can't change the background images in the animation. I've found the best solution to be to put your images into one sprite sheet, and then animate by changing the background position, but if you're building for mobile, your sprite sheets are limited to less than 1900x1900 px.
I needed to do the same thing recently. Here's a simple implementation
#wrapper { width:100%; height:100%; position:relative; }
#wrapper img { position:absolute; top:0; left:0; width:100%; height:auto; display:block; }
#wrapper .top { animation:fadeOut 2s ease-in-out; animation-fill-mode:forwards; }
#keyframes fadeOut {
0% { opacity:1; }
100% { opacity:0; }
}
<div id="wrapper">
<img src="img1.jpg" class="top" style="z-index:2;">
<img src="img2.jpg" style="z-index:1;">
</div>
You can use animated background-position property and sprite image.
You can follow by this code:
#cd{
position: relative;
margin: 0 auto;
height: 281px;
width: 450px;
}
#cf img{
left: 0;
position: absolute;
-moz-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
#cf img.top:hover{
opacity: 0;
}
<div id="cf">
<img class="button" src="Birdman.jpg" />
<img src="Turtle.jpg" class="top" />
</div>
You can use the jquery-backstretch image which allows for animated slideshows as your background-images!
https://github.com/jquery-backstretch/jquery-backstretch
Scroll down to setup and all of the documentation is there.
Well I can change them in chrome. Its simple and works fine in Chrome using -webkit css properties.

How to build a CSS animation that "slides in", revealing a text/div after it finishes sliding?

I am trying to mimic the CSS animations from a website here: https://stanographer.com/
I want to copy the way the site:
starts by showing a full screen black div sliding away to the right
"loads" the black background (div tags) behind text (as in "Hi, I'm Stanley Sakai"), expanding left to right and
"loads" the text over the black background div, expanding left to right.
Now you might ask, "Why not just inspect the page, look at the classes on the divs and text, then inspect the CSS sheet in the network tab?" And I've tried that. The CSS looks weird. My friend said it is pre-processed by SASS, whatever that means. Anyway, I cannot decipher the code.
I've been to a few different StackOverflow pages (here's one) & over a dozen different pages on Google. I learned about using keyframes but I haven't figured out how to recreate the effect on Stanographer.com. My friend, who owns the website, also provided this example, but I don't get how to apply it to individual divs. He said something about using the z-index but I just don't see it.
I know that to make the page start with a full black screen & then slide out, I have to trigger a class change using JavaScript. I have:
let blackStuff = document.getElementById("blackness");
window.addEventListener("load", () => {
console.log("loaded");
blackStuff.setAttribute("class", "black-box-out");
},
false
);
.black-box {
position: fixed;
float: left;
top: 0;
width: 100%;
height: 100%;
bottom: 0;
background-color: #000;
z-index: 999999;
-webkit-animation: powerslide 0.5s forwards;
-webkit-animation-delay: 2s;
animation: powerslide 0.5s forwards;
animation-delay: 2s;
}
#-webkit-keyframes powerslide {
100% {
left: 0;
}
}
#keyframes powerslide {
100% {
left: 0;
}
}
.black-box-out {
margin-left: 100%;
animation: slide 0.5s forwards;
-webkit-transition: slide 0.5s forwards;
transition: slide 0.5s forwards;
}
<div id="blackness" class="black-box"></div>
But this just makes the "blackness" div disappear instantly on page load. I want it to slide out. Clearly, I don't get how to use CSS animations.
If you are interested in seeing more of what doesn't work, read on. Otherwise, you can skip this section: it only shows my failed trials.
I've learned how to make a CSS animation expand horizontally from 0:
.wrapper {
position: relative;
overflow: hidden;
width: 500px;
height: 50px;
border: 1px solid black;
}
.slide-custom {
width: 500px;
height: 50px;
background: cyan;
position: relative;
-webkit-animation: slideIn 2s forwards;
animation: slideIn 2s forwards;
}
/* moz and webkit keyframes excluded for space */
#keyframes slideIn {
0% {
transform: scaleX(0);
}
100% {
transform: scaleX(1);
}
}
<div class="wrapper slide-custom">
<h1 class="slide-custom">
<span>MEET ROLY POLY.</span>
<!-- expands horizontally from 0 width to 100% width -->
</h1>
</div>
And I've learned to make text "slide in" from the left, though it starts at 100% width when I want it to start at 0% width:
/* CSS */
.test-slide {
animation-duration: 3s;
animation-name: testSlide;
}
#keyframes testSlide {
from {
margin-left: 0%;
width: 50%;
}
to {
margin-left: 100%;
width: 100%;
}
}
<div class="test-slide">
<h1><span>ABOUT.</span></h1>
<!-- will slide in from the left -->
</div>
There's more -- unfortunately none of it mimics the website I'm trying to copy.
Explanation
There are multiple ways to achieve what you want actually. I did not opt to animate width. The first few frames of the animation will be not as expected.
So instead, we can use clip-path. What clip-path basically does is masking. You can "crop" a div such that only a part of it is visible. We will utilise clip-path and ::before or ::after pseudo-element (either is fine) to create this animation. What we need to do:
Create the pseudo-element and position it such that it covers (is on top) the whole animatable element (position: absolute)
Set the pseudo-element's background to black
Using clip-path, mask the animatable element to display no parts of the element (this will also cause the pseudo-element to not be displayed as it is part of the element). The direction of the clipping is important. The direction here is from the right side to the left side.
Using animation and #keyframes, unmask the previously masked div. This will reveal it slowly from the left side to the right side (because initially, we masked it from the right to left; upon unmasking, the reverse direction happens)
Upon unmasking the element, the pseudo-element will be on top of the text we want to display
After a short while later, mask the pseudo-element (not the whole element) from the right direction to the left direction, again using clip-path so that the text seems revealed slowly
It works! However, I recommend reading about clip-path. Also, one really handy clip-path CSS generator I really like to use is this (if you want to clip from the right to left, you should drag the points from the right to left). I also highly recommend reading about CSS positioning (a staple in good CSS animations). You needn't be using z-index: 9999; you generally want to keep track of the z-index you use.
Solution
Here's a working solution using the described method. Try running it.
* {
box-sizing: border-box;
margin: 0;
padding: 0;
font-family: Helvetica;
}
body,
html {
width: 100%;
height: 100%;
}
#wrapper {
background: #555555;
width: 100%;
height: 100%;
color: white;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
#wrapper * {
margin: 5px;
}
.heading {
font-size: 3em;
padding: 10px 5px;
}
.caption {
font-size: 1em;
padding: 5px;
font-family: Courier;
}
.animatable {
position: relative;
clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%);
animation: .75s cubic-bezier(1,-0.01,.12,.8) 1s 1 reveal forwards;
}
.animatable::after {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: #20262b;
padding: inherit;
animation: .75s cubic-bezier(1,-0.01,.12,.8) 1.75s 1 hideBlack forwards;
}
#keyframes reveal {
from { clip-path: polygon(0 0, 0 0, 0 100%, 0% 100%); }
to { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
}
#keyframes hideBlack {
from { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
to { clip-path: polygon(100% 0, 100% 0, 100% 100%, 100% 100%); }
}
<div id="wrapper">
<div class="heading animatable">Hi, I am Richard!</div>
<div class="caption animatable">I am a person.</div>
</div>
Although the simple animation you wanted can be created using merely CSS, I still suggest you read about how to make animations using JavaScript and the various libraries it has in making animations. This is because once there are many animations and transitions going on, it becomes hard to keep track of animations (especially when you want animations to start after another animation ends). A good library is anime.js (do explore more options before settling on one). Furthermore, notice how the animations only appear upon scrolling down in the website you provided? That's doable only with JS (one such method is using IntersectionObserver API provided by most browsers).
Here you have some CSS3 animations, you trigger that animation when the .entrance-animation gets the .active class.
You'll need an observer to watch when the item gets into view and, when the item is visible, you add the .active class to it.
Hope it helps!
setTimeout(() =>
{
let animate = document.querySelectorAll('.entrance-animation');
animate.forEach(item => item.classList.add('active'));
}
,1000);
.entrance-animation
{
position: relative;
color: blueviolet;
white-space: nowrap;
font-size: 24px;
width: 0;
overflow: hidden;
transition: width 0.5s ease;
}
.entrance-animation::before
{
content: '';
position: absolute;
top: 0;
right: 0;
height: 100%;
width: 100%;
background-color: black;
z-index: 10;
transition: width 0.5s ease;
transition-delay: 0.5s;
}
.entrance-animation.active
{
width: 100%;
}
.entrance-animation.active::before
{
width: 0%;
}
<p class="entrance-animation">
Hello
</p>
<p class = "entrance-animation">
Here we are
</p>
You can use CSS3 transitions or maybe CSS3 animations to slide in an element.
For browser support: http://caniuse.com/
I made two quick examples just to show you how I mean.
CSS transition (on hover)
Demo One
Relevant Code
.wrapper:hover #slide {
transition: 1s;
left: 0;
}
In this case, Im just transitioning the position from left: -100px; to 0; with a 1s. duration. It's also possible to move the element using transform: translate();
CSS animation
Demo Two
#slide {
position: absolute;
left: -100px;
width: 100px;
height: 100px;
background: blue;
-webkit-animation: slide 0.5s forwards;
-webkit-animation-delay: 2s;
animation: slide 0.5s forwards;
animation-delay: 2s;
}
#-webkit-keyframes slide {
100% { left: 0; }
}
#keyframes slide {
100% { left: 0; }
}
Same principle as above (Demo One), but the animation starts automatically after 2s, and in this case I've set animation-fill-mode to forwards, which will persist the end state, keeping the div visible when the animation ends.
Like I said, two quick example to show you how it could be done.
EDIT: For details regarding CSS Animations and Transitions see:
Animations
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_CSS_animations
Transitions
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_CSS_transitions
Hope this helped.

Responsive Animated Background in Bootstrap?

After following the instructions here: https://davidwalsh.name/background-animation-css
I can make the picture move, but I cannot figure out how to make it responsive. Any ideas on how to make this possible? I have added following css code:
#keyframes animatedBackground{
from {background-position: 0 0;}
to {background-position: -1920px 0;}
}
#animate-area{
width: 560px;
height: 400px;
background-image: url("images/japan.jpg");
background-position: 0px 0px;
background-repeat: repeat-x;
animation: animatedBackground 40s linear infinite;
}
Within the demo, the width of <div id="animate-area"> is explicitly set to 560px. Try setting it to width: auto;. This should scale the div width to that of it's container/parent.

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

Moving in an Arc with Webkit Transitions

Right now I'm trying to put together something really simple, learn from it, and incorporate it in a bigger project.
I have a simple box I'm trying to move from one position to another using css webkit animations and the translate function (for iOS hardware acceloration purposes). I need it to move in an arc and then stay at that point at the top of the arc.
Now, I'm pretty new to CSS transitions. In the past I've used jQuery animations but that seems to run really slowly on mobile devices. I know there's probably some best practice ideas I can incorporate here for setting and manging these animations, but I'm kinda figuring them out as I go.
Right now the box moves all the way up and then appears back in the starting position. How do I get it to stay there?
http://cs.sandbox.millennialmedia.com/~tkirchner/rich/M/march_madness/tmp/
<style type="text/css">
#ball {
display:block;
position: absolute;
width: 50px;
height: 50px;
overflow: hidden;
top: 500px;
left: 100px;
background-color: red;
} #action {
display: block;
font-weight:bold;
}
.animation {
-webkit-animation-name: throwBall;
-webkit-animation-timing-function: linear;
-webkit-animation-duration: 1s;
-webkit-animation-iteration-count: 1;
}
#-webkit-keyframes throwBall {
from { -webkit-transform: translate( 0px, 0px ); }
25% { -webkit-transform: translate( 75px, -25px ) }
50% { -webkit-transform: translate( 150px, -75px ) }
75% { -webkit-transform: translate( 225px, -150px ) }
to { -webkit-transform: translate( 300px, -300px ); }
}
</style>
<script type="text/javascript">
if ( typeof(jQuery) == 'undefined' ) document.write('<scri'+ 'pt type="text/javascript" src="http://code.jquery.com/jquery-1.4.3.min.js"></scri'+'pt>');
</script>
<a id='action'>Animate Me</a>
<div id='ball'></div>
<script type="text/javascript">
$(document).ready(function(){
$('#action').bind('click',function(){
$('#ball').addClass('animation').bind('webkitAnimationEnd',function(){
});
});
});
</script>
Just add the end state of the animation to your class as properties set by animation are removed when animation ends. Adding -webkit-transform: translate(300px, -300px); to your animation class fixes your problem.
.animation {
-webkit-animation-name: throwBall;
-webkit-animation-timing-function: linear;
-webkit-animation-duration: 1s;
-webkit-animation-iteration-count: 1;
-webkit-transform: translate(300px, -300px);
}

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