CSS Animation not working as expected, only after saving my file

CSS Animation not working as expected, only after saving my file - javascript

I have a CSS animation for a group of spans that make out a word. I am having trouble getting them to work properly. It seems on page load or refresh, they don't work. They only work after I manually save my project file.
Here is the CSS:
.word {
margin: 2rem;
}
.word span {
cursor: pointer;
display: inline-block;
font-size: 4vw;
user-select: none;
line-height: 0.8;
animation-iteration-count: 1;
}
.word span:nth-child(1).active {
animation: balance 1.5s ease-out;
transform-origin: bottom left;
}
#keyframes balance {
0%,
100% {
transform: rotate(100deg);
}
30%,
60% {
transform: rotate(-45deg);
}
}
.word span:nth-child(2).active {
animation: shrinkjump 1s ease-in-out;
transform-origin: bottom center;
}
#keyframes shrinkjump {
10%,
35% {
transform: scale(2, 0.2) translate(0, 0);
}
45%,
50% {
transform: scale(1) translate(0, -150px);
}
80% {
transform: scale(1) translate(0, 0);
}
}
.word span:nth-child(3).active {
animation: falling 2s ease-out;
transform-origin: bottom center;
}
#keyframes falling {
12% {
transform: rotateX(240deg);
}
24% {
transform: rotateX(150deg);
}
36% {
transform: rotateX(200deg);
}
48% {
transform: rotateX(175deg);
}
60%,
85% {
transform: rotateX(180deg);
}
100% {
transform: rotateX(0deg);
}
}
.word span:nth-child(4).active {
animation: rotate 1s ease-out;
}
#keyframes rotate {
20%,
80% {
transform: rotateY(180deg);
}
100% {
transform: rotateY(360deg);
}
}
.word span:nth-child(5).active {
animation: shrinkjump 1s ease-in-out;
transform-origin: bottom center;
}
.word span:nth-child(6).active {
animation: falling 2s ease-out;
transform-origin: bottom center;
}
.word span:nth-child(7).active {
animation: toplong 1.5s linear;
}
.word span:nth-child(8).active {
animation: balance 1.5s ease-out;
transform-origin: top left;
}
#keyframes toplong {
10%,
40% {
transform: translateY(-48vh) scaleY(1);
}
90% {
transform: translateY(-48vh) scaleY(4);
}
}
And here is the JavaScript to change the className:
const spans = document.querySelectorAll(".word span");
spans.forEach((span, idx) => {
span.addEventListener("click", (e) => {
e.target.classList.add("active");
});
span.addEventListener("animationend", (e) => {
e.target.classList.remove("active");
});
});
Does anyone have any idea why the css is behaving this way? I have experimented with a timeout and with the JavaScript to udpate the className. Thanks!

Related

HTML/CSS Alignment issue

I have the code:
/* Text */
#hero h1 {
margin: 0;
font-size: 64px;
font-weight: 700;
line-height: 56px;
/* color: transparent; */
background: url("https://lovelytab.com/wp-content/uploads/2019/01/Tumblr-Aesthetic-Wallpapers-Free.jpg") repeat;
background-clip: text;
-webkit-background-clip: text;
}
/*Vertical Flip*/
.verticalFlip {
display: inline;
}
.verticalFlip span {
animation: vertical 5s linear infinite 0s;
-ms-animation: vertical 3.5s linear infinite 0s;
-webkit-animation: vertical 5s linear infinite 0s;
/* color: transparent; */
background: url("https://lovelytab.com/wp-content/uploads/2019/01/Tumblr-Aesthetic-Wallpapers-Free.jpg") repeat;
background-clip: text;
-webkit-background-clip: text;
opacity: 0;
}
.verticalFlip span:nth-child(1) {
animation-delay: 2.5s;
-ms-animation-delay: 2.5s;
-webkit-animation-delay: 2.5s;
}
/*Vertical Flip Animation*/
#-moz-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-moz-transform: rotateX(180deg);
}
10% {
opacity: 1;
-moz-transform: translateY(0px);
}
25% {
opacity: 1;
-moz-transform: translateY(0px);
}
30% {
opacity: 0;
-moz-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-webkit-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-webkit-transform: rotateX(180deg);
}
10% {
opacity: 1;
-webkit-transform: translateY(0px);
}
25% {
opacity: 1;
-webkit-transform: translateY(0px);
}
30% {
opacity: 0;
-webkit-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-ms-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-ms-transform: rotateX(180deg);
}
10% {
opacity: 1;
-ms-transform: translateY(0px);
}
25% {
opacity: 1;
-ms-transform: translateY(0px);
}
30% {
opacity: 0;
-ms-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
<section id="hero">
<h1 style="margin-bottom: 16px">Word
<div class="verticalFlip"><span> Change</span><span> Text</span></div>
</h1>
</section
Why is the word Text outputting spaces after? Why is the alignment off?
The issue is happening because I removed position: absolute; from .verticalFlip span but adding the property also makes the alignment off where some parts of the word seems to be cutting. I am trying to make .verticalFlip span the same as #hero h1. How can I make it like that? Any suggestions please?

Your description of what you want is rather vague, but if you want both words/spans alternating at the same position, add position: absolute; and optionally some margin-left to the .verticalFlip span rule.
To make sure this works in any context, also add position: relative; to the parent element of those two spans (i.e. the .verticalFlip div) to define it as the reference for the absolute position.
/* Text */
#hero h1 {
margin: 0;
font-size: 64px;
font-weight: 700;
line-height: 56px;
/* color: transparent; */
background: url("https://lovelytab.com/wp-content/uploads/2019/01/Tumblr-Aesthetic-Wallpapers-Free.jpg") repeat;
background-clip: text;
-webkit-background-clip: text;
}
/*Vertical Flip*/
.verticalFlip {
display: inline;
position: relative;
}
.verticalFlip span {
position: absolute;
margin-left: 0.3em;
animation: vertical 5s linear infinite 0s;
-ms-animation: vertical 3.5s linear infinite 0s;
-webkit-animation: vertical 5s linear infinite 0s;
/* color: transparent; */
background: url("https://lovelytab.com/wp-content/uploads/2019/01/Tumblr-Aesthetic-Wallpapers-Free.jpg") repeat;
background-clip: text;
-webkit-background-clip: text;
opacity: 0;
}
.verticalFlip span:nth-child(1) {
animation-delay: 2.5s;
-ms-animation-delay: 2.5s;
-webkit-animation-delay: 2.5s;
}
/*Vertical Flip Animation*/
#-moz-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-moz-transform: rotateX(180deg);
}
10% {
opacity: 1;
-moz-transform: translateY(0px);
}
25% {
opacity: 1;
-moz-transform: translateY(0px);
}
30% {
opacity: 0;
-moz-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-webkit-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-webkit-transform: rotateX(180deg);
}
10% {
opacity: 1;
-webkit-transform: translateY(0px);
}
25% {
opacity: 1;
-webkit-transform: translateY(0px);
}
30% {
opacity: 0;
-webkit-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
#-ms-keyframes vertical {
0% {
opacity: 0;
}
5% {
opacity: 0;
-ms-transform: rotateX(180deg);
}
10% {
opacity: 1;
-ms-transform: translateY(0px);
}
25% {
opacity: 1;
-ms-transform: translateY(0px);
}
30% {
opacity: 0;
-ms-transform: translateY(0px);
}
80% {
opacity: 0;
}
100% {
opacity: 0;
}
}
<section id="hero">
<h1 style="margin-bottom: 16px">Word
<div class="verticalFlip"><span> Change</span><span> Text</span></div>
</h1>
</section

Multiple animation rotate in css at once call in toggle onclick of one element (slow rotate, medium rotate, fast rotate)?

I have 3 animations on css what I've made in fiddle that are "animate1 (as a slow rotate), animate2 (as a medium rotate) and animate3 (as a fastest rotate) which is want to running by toggle onClick on an Element of "<h1>". untiil now of my achievements is just only till running to animate2 only after that I don't know how ? Please to anyone for solve this case and sorry for my bad english ...
demo on fiddle
function Animation() {
var anim = document.getElementsByTagName("h1")[0];
anim.innerText = "|"; anim.className = "animate1";
anim.addEventListener("webkitAnimationEnd", function() {anim.className = 'animate2'});
anim.addEventListener("animationend", function() {anim.className = 'animate2'});
}
#keyframes twister1 {
from {
transform: rotate(0);
}
to {
transform: rotate(360deg);
}
}
#keyframes twister2 {
0% {
transform: rotateZ(0deg);
}
10% {
transform: rotateZ(360deg);
}
20% {
transform: rotateZ(720deg);
}
30% {
transform: rotateZ(1080deg);
}
40% {
transform: rotateZ(1440deg);
}
50% {
transform: rotateZ(1800deg);
}
60% {
transform: rotateZ(2160deg);
}
70% {
transform: rotateZ(2520deg);
}
80% {
}
90% {
}
100% {
}
}
#keyframes twister3 {
from {
transform-origin: center;
transform: rotate(-20000deg);
opacity: 1;
}
to {
transform-origin: center;
transform: none;
opacity: 1;
}
}
.animate1 {
-webkit-animation: twister1;
animation-duration: 5s;
animation-iteration-count: 1;
animation-timing-function: linear;
animation-fill-mode: both;
}
.animate2 {
-webkit-animation: twister2;
animation-duration: 6s;
animation-iteration-count: 1;
animation-timing-function: linear;
animation-fill-mode: both;
}
.animate3 {
-webkit-animation: twister3;
animation-duration: 5s;
animation-iteration-count: 1;
animation-timing-function: linear;
animation-fill-mode: both;
}
.center {
font-family: 'Montserrat', sans-serif;
transform: translateY(-50%);
text-align: center;
position: fixed;
margin: 0px;
width: 100%;
color: #222;
z-index: 1;
top: 50%;
}
<div class="center">
<h1 onclick="Animation()">|</h1>
</div>

Use only one animation and simply increase/decrease the duration to control the speed:
var i = 7;
var anim = document.getElementsByTagName("h1")[0];
function Animation() {
anim.className = "animate";
anim.style.animationDuration = (i-=2) + 's';
if(i<=0) {
i=7;
}
}
#keyframes twister {
from {
transform: rotate(0);
}
to {
transform: rotate(360deg);
}
}
.animate {
animation: twister 5s infinite linear;
}
.center {
font-family: 'Montserrat', sans-serif;
transform: translateY(-50%);
text-align: center;
position: fixed;
margin: 0px;
width: 100%;
color: #222;
z-index: 1;
top: 50%;
}
<div class="center">
<h1 onclick="Animation()">|</h1>
</div>

stop animation and align all circles on same line on hover

I have made an animation which on hover must be like the image below;1
But instead it always align like this;2
I want to align all the in a straight line when animation is paused on hover on . But it did not happen.I tried to use animation-fill-mode:forwards; but it did not worked.All the <div id="circle"> must be align in a straight line such that it resembles a straight block of sevral colors just like my first pictures which was my expectation. It occurs sometime only but not every time. I want it to occur every time as i hover the <div>. You can use javascript too. but this animation must work and all <div> must align in a straight line.
.circle-container{
height:100px;
display:flex;
position:absolute;
width:fit-content;
overflow:hidden;
align-items:center;
justify-content:center;
}
div.circle1 {order:1;}
div.circle2 {order:2;}
div.circle3 {order:3;}
div.circle4 {order:4;}
div.circle5{order:5;}
.circle1, .circle2, .circle3, .circle4, .circle5{
border-radius:45%;
}
#circle{
align-items:center;
justify-content:center;
color:white;
display:flex;
height:55px;
width:55px;
}
.circle5{
background:#FF6347;
animation:bubbling5 1s infinite;
animation-direction:alternate;
}
.circle4{
background:#4682B4;
animation:bubbling4 1s infinite;
animation-direction:alternate;
}
.circle3{
background:#D2B48C;
animation:bubbling3 1s infinite;
animation-direction:alternate;
}
.circle2{
background:#008080;
animation:bubbling2 1s infinite;
animation-direction:alternate;
}
.circle1{
background:#D8BFD8;
animation:bubbling1 1s infinite;
animation-direction:alternate;
}
#keyframes bubbling1 {
0% {
transform: translateY(0px) translateX(22px);
}
50% {
transform: translateY(-10px) translateX(22px);
}
75% {
transform: translateY(10px) translateX(22px);
}
100% {
transform: translateY(0px) translateX(22px);
}
}
#keyframes bubbling2 {
0% {
transform: translateY(0px) translateX(12px);
}
45% {
transform: translateY(-10px) translateX(12px);
}
70% {
transform: translateY(10px) translateX(12px);
}
100% {
transform: translateY(0px) translateX(12px);
}
}
#keyframes bubbling3 {
0% {
transform: translateY(0px) translateX(2px);
}
40% {
transform: translateY(-10px) translateX(2px);
}
65% {
transform: translateY(10px) translateX(2px);
}
100% {
transform: translateY(0px) translateX(2px);
}
}
#keyframes bubbling4 {
0% {
transform: translateY(0px) translateX(-8px);
}
35% {
transform: translateY(-10px) translateX(-8px);
}
60% {
transform: translateY(10px) translateX(-8px);
}
100% {
transform: translateY(0px) translateX(-8px);
}
}
#keyframes bubbling5 {
0% {
transform: translateY(0px) translateX(-18px);
}
30% {
transform: translateY(-10px) translateX(-18px);
}
55% {
transform: translateY(10px) translateX(-18px);
}
100% {
transform: translateY(0px) translateX(-18px);
}
}
.circle-container:hover {
position:absolute;
}
.circle-container:hover .circle5 {
border-radius:0% 30% 30% 0%;
animation-play-state:paused;
transition: all 0.2s;
}
.circle-container:hover .circle4 {
border-radius:0%;
animation-play-state:paused;
transition: all 0.4s;
}
.circle-container:hover .circle3 {
border-radius:0%;
animation-play-state:paused;
transition: all 0.6s;
}
.circle-container:hover .circle2 {
border-radius:0%;
transition: all 0.8s;
animation-play-state:paused;
}
.circle-container:hover .circle1 {
border-radius:30% 0% 0% 30%;
transition: all 1s;
animation-play-state:paused;
}
.circle-container:hover .c-title {
display:none;
}
<div class="circle-container">
<div id="circle" class="circle1"><h1 class="c-title">E</h1></div>
<div id="circle" class="circle2"><h1 class="c-title">M</h1></div>
<div id="circle" class="circle3"><h1 class="c-title">A</h1></div>
<div id="circle" class="circle4"><h1 class="c-title">I</h1></div>
<div id="circle" class="circle5"><h1 class="c-title">L</h1></div>
</div>

Looks like someone produced a ton of unnecessary code =))
Regarding your question, you have to remove the animation at all, not pause it.
See the snippet below.
.circle-container {
height: 100px;
display: flex;
position: absolute;
width: fit-content;
overflow: hidden;
align-items: center;
justify-content: center;
}
.circle-container div {
display: inline-block;
height: 55px;
width: 55px;
margin-right: -10px;
border-radius: 45%;
color: white;
font:900 2em/55px serif;
text-align: center;
animation: bubbling 1s infinite alternate;
transition: all .2s;
}
.circle-container div:nth-child(1) {
background: #D8BFD8;
}
.circle-container div:nth-child(2) {
background: #008080;
animation-delay: .1s;
}
.circle-container div:nth-child(3) {
background: #D2B48C;
animation-delay: .2s;
}
.circle-container div:nth-child(4) {
background: #4682B4;
animation-delay: .3s;
}
.circle-container div:nth-child(5) {
background: #FF6347;
margin: 0;
animation-delay: .4s;
}
#keyframes bubbling {
50% {
transform: translateY(-10px);
}
75% {
transform: translateY(10px);
}
}
.circle-container:hover div {
border-radius: 0;
color: transparent;
transform: translateY(0);
animation: none;
}
.circle-container:hover div:last-child {
border-radius: 0 30% 30% 0;
}
.circle-container:hover div:first-child {
border-radius: 30% 0 0 30%;
}
<div class="circle-container">
<div>E</div>
<div>M</div>
<div>A</div>
<div>I</div>
<div>L</div>
</div>

Css Custom Loader Animation

My Custom CSS Loader
.LoaderWrap {
width:100%;
margin-top:25px;
box-sizing:border-box;
}
.sampleContainer {
float:left;
height: 40px;
width: 100%;
margin:10px 10px 20px 10px;
box-sizing:border-box;
}
.loader,
.loader.Large {
position:absolute;
left:50%;
box-sizing:border-box;
}
.dot,
.loader.Large .dot {
display: inline-block;
margin-top:20px;
width: 8px;
height: 8px;
-webkit-border-radius:4px;
-moz-border-radius:4px;
border-radius: 4px;
background: #888;
position: absolute;
top: 0; bottom: 0;
left: 0; right: 0;
}
.loader.Large .dot {
width: 24px;
height: 24px;
-webkit-border-radius:12px;
-moz-border-radius:12px;
border-radius: 12px;
}
/** Large Dots **/
.loader.Large .dot_1 {
animation: LargeDot1 1.5s linear infinite;
left:38px;
}
#keyframes LargeDot1 {
0% { transform: rotate(0deg) translateX(-38px); }
25% { transform: rotate(180deg) translateX(-38px); }
75% { transform: rotate(180deg) translateX(-38px); }
100% { transform: rotate(360deg) translateX(-38px); }
}
.loader.Large .dot_2 {
left:76px;
animation: LargeDot2 1.5s linear infinite;
animation-delay: 0.5s;
}
#keyframes LargeDot2 {
0% { transform: rotate(0deg) translateX(-38px); }
25% { transform: rotate(-180deg) translateX(-38px); }
75% { transform: rotate(-180deg) translateX(-38px); }
100% { transform: rotate(-360deg) translateX(-38px); }
}
.loader.Large .dot_3 {
left:38px;
animation: LargeDot3 1.5s linear infinite;
}
#keyframes LargeDot3 {
0% { transform: rotate(0deg) translateX(38px); }
25% { transform: rotate(180deg) translateX(38px); }
75% { transform: rotate(180deg) translateX(38px); }
100% { transform: rotate(360deg) translateX(38px); }
}
.loader.Large .dot_4 {
left:76px;
animation: LargeDot4 1.5s linear infinite;
animation-delay: 0.5s;
}
#keyframes LargeDot4 {
0% { transform: rotate(0deg) translateX(38px); }
25% { transform: rotate(-180deg) translateX(38px); }
75% { transform: rotate(-180deg) translateX(38px); }
100% { transform: rotate(-360deg) translateX(38px); }
}
<div class="LoaderWrap clearfix">
<div class="loader Large">
<span class="dot dot_1"></span>
<span class="dot dot_2"></span>
<span class="dot dot_3"></span>
<span class="dot dot_4"></span>
</div>
</div>
So What's Wrong?
Nothing is 'wrong' as such, feel free to use this loader by all means! However I would like to make this more interesting, turn the dots into stars for example and maybe even go one step further by having the dots (circles) transform into different shapes.
As much as I love CSS and consider myself to be an expert, animating CSS is fairly new to me whereas this is the first CSS animation I have made and I want to make this more unique and crazy for the theme of the website I am working on, not to say that I don't love this loader and asking for, call it improving my skills?, means people will also use, but nevertheless, it is a learning path!
Minimal Question:
How can I have myh dots (circles) as starts OR have my dots (circles) tranform into different shapes, whether it is transforming from basic squares to circles or whatnot using pure CSS and/or JS/jQuery?

Possible to reverse a css animation on class removal?

Essentially what I'm trying to do is give an element a CSS animation when it gains a class, then reverse that animation when I remove the class without playing the animation when the DOM renders.
Fiddle here: http://jsfiddle.net/bmh5g/
As you can see in the fiddle, when you hover the "Hover Me" button, #item flips down. When you mouseoff the hover button, #item just disappears. I want #item to flip back up (ideally using the same animation but in reverse). Is this possible?
$('#trigger').on({
mouseenter: function() {
$('#item').addClass('flipped');
},
mouseleave: function() {
$('#item').removeClass('flipped');
}
})
#item {
position: relative;
height: 100px;
width: 100px;
background: red;
-webkit-transform: perspective(350px) rotateX(-90deg);
transform: perspective(350px) rotateX(-90deg);
-webkit-transform-origin: 50% 0%;
transform-origin: 50% 0%;
}
#item.flipped {
animation: flipper 0.7s;
animation-fill-mode: forwards;
-webkit-animation: flipper 0.7s;
-webkit-animation-fill-mode: forwards;
}
#keyframes flipper {
0% {
transform: perspective(350px) rotateX(-90deg);
}
33% {
transform: perspective(350px) rotateX(0deg);
}
66% {
transform: perspective(350px) rotateX(10deg);
}
100% {
transform: perspective(350px) rotateX(0deg);
}
}
#-webkit-keyframes flipper {
0% {
-webkit-transform: perspective(350px) rotateX(-90deg);
}
33% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
66% {
-webkit-transform: perspective(350px) rotateX(10deg);
}
100% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id='trigger'>Hover Me</div>
<div id='item'></div>

I would have the #item start out hidden with the reverse animation by default. Then add the class to give it the animation and show the #item. http://jsfiddle.net/bmh5g/12/
$('#trigger').on({
mouseenter: function() {
$('#item').show();
$('#item').addClass('flipped');
},
mouseleave: function() {
$('#item').removeClass('flipped');
}
});
#trigger {
position: relative;
display: inline-block;
padding: 5px 10px;
margin: 0 0 10px 0;
background: teal;
color: white;
font-family: sans-serif;
}
#item {
position: relative;
height: 100px;
width: 100px;
background: red;
display: none;
-webkit-transform: perspective(350px) rotateX(-90deg);
transform: perspective(350px) rotateX(-90deg);
-webkit-transform-origin: 50% 0%;
transform-origin: 50% 0%;
animation: flipperUp 0.7s;
animation-fill-mode: forwards;
-webkit-animation: flipperUp 0.7s;
-webkit-animation-fill-mode: forwards;
}
#item.flipped {
animation: flipper 0.7s;
animation-fill-mode: forwards;
-webkit-animation: flipper 0.7s;
-webkit-animation-fill-mode: forwards;
}
#keyframes flipper {
0% {
transform: perspective(350px) rotateX(-90deg);
}
33% {
transform: perspective(350px) rotateX(0deg);
}
66% {
transform: perspective(350px) rotateX(10deg);
}
100% {
transform: perspective(350px) rotateX(0deg);
}
}
#-webkit-keyframes flipper {
0% {
-webkit-transform: perspective(350px) rotateX(-90deg);
}
33% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
66% {
-webkit-transform: perspective(350px) rotateX(10deg);
}
100% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
}
#keyframes flipperUp {
0% {
transform: perspective(350px) rotateX(0deg);
}
33% {
transform: perspective(350px) rotateX(10deg);
}
66% {
transform: perspective(350px) rotateX(0deg);
}
100% {
transform: perspective(350px) rotateX(-90deg);
}
}
#-webkit-keyframes flipperUp {
0% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
33% {
-webkit-transform: perspective(350px) rotateX(10deg);
}
66% {
-webkit-transform: perspective(350px) rotateX(0deg);
}
100% {
-webkit-transform: perspective(350px) rotateX(-90deg);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div id='trigger'>Hover Me</div>
<div id='item'></div>

Another approach, rather than using display: none, is to suppress the reverse animation with a class on page load, and then remove that class with the same event that applies the normal animation (eg: flipper). Like so (http://jsfiddle.net/astrotim/d7omcbrz/1/):
CSS - in addition to the flipperUp keyframe posted by Blake above
#item.no-animation
{
animation: none;
}
jQuery
$('#trigger').on({
mouseenter: function(){
$('#item').removeClass('no-animation');
$('#item').addClass('flipped');
},
mouseleave: function(){
$('#item').removeClass('flipped');
}
})

In addition to the answers here, please cache your $(selector)
So you pretty much do this var elements = $(selector); to cache.
Why?! Because if you use the code in the answers on this page as is you will ask the DOM for that same element collection ($('#item')) each time. DOM reading is an expensive operation.
For example, the accepted answer would look something like so:
var item = $('#item');
$('#trigger').on({
mouseenter: function(){
item.show();
item.addClass('flipped');
},
mouseleave: function(){
item.removeClass('flipped');
}
});
Since I've written all this text, might as well answer your question using CSS transitions
I know you asked for a CSS animations example, but for the animation you wanted to do (a card flipping open), it can be easily achieved using CSS transitions:
#item {
width: 70px;
height: 70px;
background-color: black;
line-height: 1;
color: white;
}
#item+div {
width: 70px;
height: 100px;
background-color: blue;
transform: perspective(250px) rotateX(-90deg);
transform-origin: 50% 0%;
transition: transform .25s ease-in-out
}
#item:hover+div {
transform: perspective(250px) rotateX(0);
}
<div id="item"></div>
<div></div>

Its animating down using css so to get it to animate up you need to create a class, say .item-up that does the transformation in the opposite so then you would remove the previous class and add the item-up class and that should animate it up.
I would write you a js fiddle for it but I dont know the syntax well enough.
Basically when you will need:
#keyframes flipper
#keyframes flipper-up //This does the opposite of flipper
and
$('#trigger').on({
mouseenter: function(){
$('#item').removeClass('flipped-up');
$('#item').addClass('flipped');
},
mouseleave: function(){
$('#item').removeClass('flipped');
$('#item').addClass('flipped-up');
}
})
jsfiddle.net/bmh5g/3 courtesy of Jake

CSS solution from MDN and almost supported by all browser
.animation(animationName 10s ease-in-out infinite alternate both running;)

You can make use of the attribute animation-direction to run the same animation in reverse.
If you couple this with one of the many methods described here for restarting an animation- we can start the animation forwards on mouseenter, then on mouseleave we can restart it and play it in reverse.
I don't know how to use jQuery very well, so I chose one of the non-jQuery methods mentioned in the article.
const element_button = document.getElementById('trigger');
const element_item = document.getElementById('item');
element_button.addEventListener("mouseenter", () => {
if (element_item.classList.contains('animate-backwards')) {
element_item.classList.remove('animate-backwards');
void element_item.offsetWidth;
}
element_item.classList.add('animate-forwards');
});
element_button.addEventListener("mouseleave", () => {
element_item.classList.remove('animate-forwards');
void element_item.offsetWidth;
element_item.classList.add('animate-backwards');
});
and
#item.animate-forwards {
animation: flipper 0.7s normal;
-webkit-animation: flipper 0.7s normal;
animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
#item.animate-backwards {
animation: flipper 0.7s reverse;
-webkit-animation: flipper 0.7s reverse;
animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
Here is a jsFiddle for the above code.

Worked fo me:
1 animation in reverse for the Element (from 100% to 0%)
1 separate animation forwards for the new class (from 0% to 100%)
And toggling that class would work
[1]: https://jsfiddle.net/q7bc4s0f/17/
Upd:
That way animation will play backwards on page load. To solve this you have to ADD new bacwards animation class on event ONCE and then toggle forwards animation class on that event.

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