Develop Reference

Is there a way to make an element spin around without a variable telling how far it has already turned?

I have an experimental website that plays music, and I want the forward and backward buttons to spin when you click them. But, I also don't want to have 2 variables to be how far they have turned, or a function to get how far they have turned from the CSS transform property. They have a transition, for hover effects. I have tried
backward.classList.add("notrans");
backward.style.transform = "rotateZ(0deg)";
backward.classList.remove("notrans");
backward.style.transform = "rotateZ(-360deg)";
and some closely related things, and also have a setTimeout to reset it afterwards, which it too long for a post.

Animate is what you are searching for.
This should be a working example: (Tested in FF and Chrome)
/* THIS IS A JAVASCRIPT CLASS THAT ADDS AND
REMOVES THE CSS CLASS FROM YOUR ELEMENT
USING THE ELEMENT'S ID VALUE TO REFERENCE. */
function startStop(strstp) {
var infinite = document.getElementById("imSpinning");
var once = document.getElementById("imSpinningOnce");
if(strstp == 1)
{
infinite.classList.add("spin");
once.classList.add("spinOnce");
timer = setTimeout(function() {
once.classList.remove("spinOnce");
},1000);
}
else
{
infinite.classList.remove("spin");
once.classList.remove("spinOnce");
}
}
/* THIS IS THE CSS CLASS THAT CREATES INFINITE ROTATION */
.spin {
-webkit-animation:spin 1s linear infinite;
-moz-animation:spin 1s linear infinite;
animation:spin 1s linear infinite;
}
#-moz-keyframes spin { 100% { -moz-transform: rotate(360deg); } }
#-webkit-keyframes spin { 100% { -webkit-transform: rotate(360deg); } }
#keyframes spin { 100% { -webkit-transform: rotate(360deg); transform:rotate(360deg); } }
/* THIS IS THE CSS CLASS THAT ROTATES ONCE */
.spinOnce {
-webkit-animation:spin 1s linear;
-moz-animation:spin 1s linear;
animation:spin 1s linear;
}
#-moz-keyframes spinOnce { 100% { -moz-transform: rotate(360deg); } }
#-webkit-keyframes spinOnce { 100% { -webkit-transform: rotate(360deg); } }
#keyframes spinOnce { 100% { -webkit-transform: rotate(360deg); transform:rotate(360deg); } }
<div style="width: 100px; height: 30px; background-color: green; color: white; margin: 20px; text-align: center; cursor: pointer;" onclick="startStop(1)">
GO
</div>
<div style="width: 100px; height: 30px; background-color: red; color: white; margin: 20px; text-align: center; cursor: pointer;" onclick="startStop(0)">
STOP
</div>
<!-- ELEMENT TO ROTATE INFINITLY WITH "spin" CLASS -->
<div id="imSpinning" class="spin" style="position: absolute; top: 10px; right: 30px; height: 140px; width: 140px; background-image: url(https://icons.iconarchive.com/icons/thehoth/seo/256/seo-web-code-icon.png); background-size: 100% 100%; background-position: center center; border-radius: 50%; overflow: hidden;"></div>
<!-- ELEMENT TO ROTATE ONCE WITH "spin" CLASS -->
<div id="imSpinningOnce" class="spinOnce" style="position: absolute; top: 10px; right: 200px; height: 140px; width: 140px; background-image: url(https://icons.iconarchive.com/icons/thehoth/seo/256/seo-web-code-icon.png); background-size: 100% 100%; background-position: center center; border-radius: 50%; overflow: hidden;"></div>
Simply copy the CSS class above to the style section/sheet of your page and modify it as needed. Ensure you reference the class in your html element.
Also I edited in a small JavaScript class that add/removes the spin class from the DIV element if it helps you in starting and stopping the animation.
Hope this helps, and best of luck!

positioning of an SVG based on the animation SVG

I'm trying to make a submarine (SVG) seem as if it's floating on top of a
wave (also SVG).
Since the wave is constantly going up and down, I want the submarine to be centered vertically (x), but be moving horizontally on top of the wave.
This is the code for the wave
// best seen at 1500px or less
html, body { height: 100%; }
body {
background:radial-gradient(ellipse at center, rgba(255,254,234,1) 0%, rgba(255,254,234,1) 35%, #B7E8EB 100%);
overflow: hidden;
}
.ocean {
height: 5%;
width:100%;
position:absolute;
bottom:0;
left:0;
background: #015871;
}
.wave {
background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/85486/wave.svg) repeat-x;
position: absolute;
top: -198px;
width: 6400px;
height: 198px;
animation: wave 7s cubic-bezier( 0.36, 0.45, 0.63, 0.53) infinite;
transform: translate3d(0, 0, 0);
}
.wave:nth-of-type(2) {
top: -175px;
animation: wave 7s cubic-bezier( 0.36, 0.45, 0.63, 0.53) -.125s infinite, swell 7s ease -1.25s infinite;
opacity: 1;
}
#keyframes wave {
0% {
margin-left: 0;
}
100% {
margin-left: -1600px;
}
}
#keyframes swell {
0%, 100% {
transform: translate3d(0,-25px,0);
}
50% {
transform: translate3d(0,5px,0);
}
}
<div class="ocean">
<div class="wave"></div>
<div class="wave"></div>
</div>

I added a class called 'sub' to get your picture formatted and also to add the animation. Notice I added the 'ease-out' as the animation timing function so that it goes down fast but up slower to keep up with the wave timing. But this is also just a result of tweaking the parameters and the animation 'updown' just right so that its working in the opposite direction to the wave based on how it starts. This is one way to do it, if you want to tweak the height or the ease out just change the seconds on ease-out in the 'sub' class or tweak the pixel count in the updown function. Hope this helps!
// best seen at 1500px or less
html, body { height: 100%; }
body {
background:radial-gradient(ellipse at center, rgba(255,254,234,1) 0%, rgba(255,254,234,1) 35%, #B7E8EB 100%);
overflow: hidden;
}
.sub{
position: absolute;
top: 85%;
left: 50%;
width: 100px;
height: 100px;
margin-top: -100px; /* Start height margin */
margin-left: -50px; /* Half the width */
animation: updown 7s cubic-bezier(0.42, 0, 0.58, 1) infinite;
animation-timing-function:ease-in-out;
transform: translate3d(0, 0, 0);
}
.ocean {
height: 5%;
width:100%;
position:absolute;
bottom:0;
left:0;
background: #015871;
}
.wave {
background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/85486/wave.svg) repeat-x;
position: absolute;
top: -198px;
width: 6400px;
height: 198px;
animation: wave 7s cubic-bezier(0.36, 0.48, 0.63, 0.53) infinite;
transform: translate3d(0, 0, 0);
}
.wave:nth-of-type(2) {
top: -175px;
animation: wave 7s cubic-bezier( 0.36, 0.45, 0.63, 0.53) -.125s infinite,
swell 7s ease -1.25s infinite;
opacity: 1;
}
#keyframes wave {
0% {
margin-left: 0;
}
100% {
margin-left: -1600px;
}
}
#keyframes swell {
0%, 100% {
transform: translate3d(0,-25px,0);
}
50% {
transform: translate3d(0,5px,0);
}
}
#keyframes updown {
0%, 100% {
transform: translate3d(0,-40px,0);
}
70% {
transform: translate3d(0,45px,0);
}
}
<img class = "sub" src = "https://image.flaticon.com/icons/svg/447/447773.svg">
<div class="ocean">
<div class="wave"></div>
<div class="wave"></div>
</div>

WebkitTransform not fluent

I am trying to rotate an element using jquery. My problem is that the element doesn't rotate fluently, but the speed is being increased from the beginning and decreased in before the end of the rotation. Is there a way to rotate element fluently? Thanks.
rotatingElement.css({
WebkitTransform: 'rotate(' + max_rotation + 'deg)',
WebkitTransitionDuration: rotating_time + 's'
});

Try this. Use linear option in -webkit-animation
div {
margin: 20px;
width: 100px;
height: 100px;
background: #f00;
-webkit-animation: spin 1s infinite linear;
}
#-webkit-keyframes spin {
0% {
-webkit-transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
}
}
p {
margin: 20px;
width: 100px;
height: 100px;
background: green;
-webkit-animation: spin 3s infinite;
}
whith linear option
<div></div>
<br>whithout linear option
<p></p>

CSS Animation Fill Mode - What have I done wrong?

I need to create a rotation animation. A click event spins an element 180° to point down. Another click event spins the same element back to 0° to point up.
I have animation-fill-mode to set to forwards to preserve the last keyframe state. But it does not appear to be working. All visual elements reset to the default state.
Any ideas what I may be doing wrong?
My Codepen: http://codepen.io/simspace-dev/pen/RrpGmP
My code:
(function() {
$('#btnb').on('click', function(e) {
return $('.box').addClass('spin-counter-clockwise');
});
$('#btnf').on('click', function(e) {
return $('.box').addClass('spin-clockwise');
});
$('.box').on('webkitAnimationEnd', function(e) {
return $(e.target).removeClass('spin-counter-clockwise').removeClass('spin-clockwise');
});
}.call(this));
.box {
background: red;
position: relative;
width: 176px;
height: 176px;
margin: 40px auto;
text-align: center;
}
.box .top {
background: green;
position: absolute;
top: 0;
width: 100%;
height: 28px;
}
.box .bottom {
background: purple;
position: absolute;
bottom: 0;
width: 100%;
height: 28px;
}
.box .caret {
color: white;
font-size: 88px;
position: absolute;
top: 42px;
left: 50px;
}
.spin-clockwise {
-moz-animation: spin 2s;
-webkit-animation: spin 2s;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
.spin-counter-clockwise {
-moz-animation: spin 2s reverse;
-webkit-animation: spin 2s reverse;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
#keyframes spin {
from {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
to {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
}
body {
text-align: center;
margin: 0 auto;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>Keyframes are not supported in IE9 and earlier</h2>
<div class="box">
<div class="top">top</div>
<div class="caret"><i class="fa fa-caret-square-o-up"></i>
</div>
<div class="bottom">bottom</div>
</div>
<p>
<button id="btnf">SPIN CLOCKWISE</button>
</p>
<p>
<button id="btnb">SPIN COUTNER CLOCKWISE</button>
</p>

TL;DR: (straight to the suggested solution)
If all you need is a rotation from 0° to 180° on the click of one button and back from 180° to 0° on the other then I would suggest using transitions instead of animations. Transitions by default produce the reverse effect and so there is no need to code for two different states (which makes it even better).
(function() {
$('#btnb').on('click', function(e) {
return $('.box').removeClass('spin');
});
$('#btnf').on('click', function(e) {
return $('.box').addClass('spin');
});
}.call(this));
.box {
background: red;
position: relative;
width: 176px;
height: 176px;
margin: 40px auto;
text-align: center;
transition: transform 1s linear;
/* add this to enable transition */
}
.box .top {
background: green;
position: absolute;
top: 0;
width: 100%;
height: 28px;
}
.box .bottom {
background: purple;
position: absolute;
bottom: 0;
width: 100%;
height: 28px;
}
.box .caret {
color: white;
font-size: 88px;
position: absolute;
top: 42px;
left: 50px;
}
.spin {
/* this is the only thing required for rotation (along with the JS) */
transform: rotate(180deg);
}
body {
text-align: center;
margin: 0 auto;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>Keyframes are not supported in IE9 and earlier</h2>
<div class="box">
<div class="top">top</div>
<div class="caret"><i class="fa fa-caret-square-o-up"></i>
</div>
<div class="bottom">bottom</div>
</div>
<p>
<button id="btnf">SPIN CLOCKWISE</button>
</p>
<p>
<button id="btnb">SPIN COUTNER CLOCKWISE</button>
</p>
If you were using animations only for learning purpose, the details provided below should still be useful to you in terms of understanding how animations work, what are the limitations because of it etc.
Chris' answer touches upon the reason for your problem but I thought the question merited a bit more detailed explanation of two things - (1) Why the element doesn't hold the state as at the last keyframe even though animation-fill-mode: forwards setting is applied (2) Why the same keyframe couldn't be used for the reverse animation (when the class with the original animation was not removed). I also wanted to suggest a different alternate to the whole thing and hence the separate answer.
Why does the element not hold the state as at the last keyframe even though fill mode is set to forwards?
This is because you are removing the class that adds the animation as soon as animation completes (inside the on('webkitAnimationEnd') event handler). Generally when animation-fill-mode is set to forwards, the UA uses the settings (or property-value pair) that are provided within last keyframe to maintain the state. But once the class is removed (and in-turn the animation settings), the UA does not keep track of (or know what) animations that were prior present on the element, their state and fill mode etc. Once animation is removed, the browser triggers a repaint and this will be performed based on classes that are present on the element as at the time of the repaint. Due to this, the element would snap back to its un-rotated state. You can read more about it in my answer here to a similar question (but not the same :)).
Why can't the same keyframe be used for the reverse animation (when the class which had the original animation was not removed)?
This again is because of how animations generally work. When any animation is added to an element, the UA maintains details about the animation's keyframes, its state etc as long as it is attached to the element. So, unless the class which added the forward (0° to 180°) animation is removed, the browser thinks that it has executed the animation to completion (as default iteration count is just 1) and so even when a class with the reverse animation is added, it does nothing. The only way to make it restart the animation in reverse direction is by removing the class with the forward animation and then adding the class with the reverse animation. You can have a look at this answer also for related reading.
Because of the aforementioned reasons, the only way to achieve what you need with animations is to create two different animations (or keyframes) for the forward and reverse animations, set them under two different classes and keep changing the classes using JavaScript. This whole process becomes tedious and is generally not necessary when all you need is a rotation from (0° to 180°) on the click of one button and back from (180° to 0°) on the other. This whole thing can be achieved using transitions and what makes this even better is the fact that transitions by default produce the reverse effect and so there is no need to code for two different states.
Further Reading:
What are the differences between Transitions and Animations
Choosing Transitions or Animations - When to use which?
If the need is to have continuous clockwise or counter-clockwise rotations with each button click (like in oMiKeY's answer) then I'd still recommend using transition with a bit of JS like in the below snippet. Let's leave animations for more complex stuff (and in specific stuff that'd happen without any triggers).
(function() {
var deg = 0;
$('#btnb').on('click', function(e) {
deg -= 180;
return $('.box').css('transform', 'rotate(' + deg + 'deg)');
});
$('#btnf').on('click', function(e) {
deg += 180;
return $('.box').css('transform', 'rotate(' + deg + 'deg)');
});
}.call(this));
.box {
background: red;
position: relative;
width: 176px;
height: 176px;
margin: 40px auto;
text-align: center;
transition: transform 1s linear; /* add this to enable transition */
}
.box .top {
background: green;
position: absolute;
top: 0;
width: 100%;
height: 28px;
}
.box .bottom {
background: purple;
position: absolute;
bottom: 0;
width: 100%;
height: 28px;
}
.box .caret {
color: white;
font-size: 88px;
position: absolute;
top: 42px;
left: 50px;
}
body {
text-align: center;
margin: 0 auto;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>Keyframes are not supported in IE9 and earlier</h2>
<div class="box">
<div class="top">top</div>
<div class="caret"><i class="fa fa-caret-square-o-up"></i>
</div>
<div class="bottom">bottom</div>
</div>
<p>
<button id="btnf">SPIN CLOCKWISE</button>
</p>
<p>
<button id="btnb">SPIN COUTNER CLOCKWISE</button>
</p>

So the root issue was the class with the animation was being removed.
I couldn't get it to work using the same keyframes, but what i did was create a new keyframes for counter clockwise, and then removed the opposite class when the buttons were clicked
Changes:
css
.spin-clockwise {
-moz-animation: spin 2s;
-webkit-animation: spin 2s;
}
.spin-fill-mode {
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
animation-fill-mode: forwards;
}
.spin-counter-clockwise {
-moz-animation: spin-counter 2s;
-webkit-animation: spin-counter 2s;
}
#keyframes spin {
from {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
to {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
}
#keyframes spin-counter {
from {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
to {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
}
js:
$('#btnb').on('click', (e)->
$('.box')
.addClass('spin-counter-clockwise')
.removeClass('spin-clockwise')
)
$('#btnf').on('click', (e) ->
$('.box')
.addClass('spin-clockwise')
.removeClass('spin-counter-clockwise')
)
And add the class spin-fill-mode to box. Though you could probably just leave the fill-mode in the animation classes...
updated codepen:
http://codepen.io/anon/pen/QypvOr

I fiddled with it for a while then decided you might need two separate rotation animations.
Check out my fiddle: http://codepen.io/anon/pen/jWBmZK
(function() {
$('#btnb').on('click', function(e) {
return $('.box')
.addClass('spin-counter-clockwise')
.toggleClass('upside-down');
});
$('#btnf').on('click', function(e) {
return $('.box')
.addClass('spin-clockwise')
.toggleClass('upside-down');
});
$('.box').on('webkitAnimationEnd', function(e) {
return $(e.target).removeClass('spin-counter-clockwise').removeClass('spin-clockwise');
});
}.call(this));
.box {
background: red;
position: relative;
width: 176px;
height: 176px;
margin: 40px auto;
text-align: center;
}
.box .top {
background: green;
position: absolute;
top: 0;
width: 100%;
height: 28px;
}
.box .bottom {
background: purple;
position: absolute;
bottom: 0;
width: 100%;
height: 28px;
}
.box .caret {
color: white;
font-size: 88px;
position: absolute;
top: 42px;
left: 50px;
}
.upside-down {
-moz-transform: rotate(180deg);
-webkit-transform: rotate(180deg);
-ms-transform: rotate(180deg);
-o-transform: rotate(180deg);
transform: rotate(180deg);
}
.spin-clockwise.upside-down {
-moz-animation: spin 2s;
-webkit-animation: spin 2s;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
.spin-counter-clockwise {
-moz-animation: spin 2s reverse;
-webkit-animation: spin 2s reverse;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
.spin-clockwise {
-moz-animation: back-spin 2s;
-webkit-animation: back-spin 2s;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
.spin-counter-clockwise.upside-down {
-moz-animation: back-spin 2s reverse;
-webkit-animation: back-spin 2s reverse;
-moz-animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}
#keyframes spin {
from {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
to {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
}
#keyframes back-spin {
from {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
to {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
body {
text-align: center;
margin: 0 auto;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
<body>
<h2>Keyframes are not supported in IE9 and earlier</h2>
<div class="box">
<div class="top">top</div>
<div class="caret"><i class="fa fa-caret-square-o-up"></i>
</div>
<div class="bottom">bottom</div>
</div>
<p>
<button id="btnf">SPIN CLOCKWISE</button>
</p>
<p>
<button id="btnb">SPIN COUTNER CLOCKWISE</button>
</p>
</body>
</html>

Loading CSS3 when page loads

I have the following HTML code. I have applied some animations to the logo using CSS3 and it's working as I wanted. Now the animation works when we hover on the logo. I want the animation to work automatically when the page loads.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>After Quote</title>
<style type="text/css">
.container {
background: none repeat scroll 0 0 #1180AE;
height: 340px;
margin: 0 auto;
padding-top: 50px;
width: 215px;
background: url(container.jpg) no-repeat;
}
.content {
background: none repeat scroll 0 0 #FFFFFF;
border-radius: 8px;
height: 200px;
margin: 0 auto;
padding-top: 115px;
width: 194px;
}
.logo:hover {
border-radius: 50%;
transform: rotate(720deg);
}
.logo {
height: 80px;
margin: 0 auto;
transition: all 1s ease 0s;
width: 80px;
}
.logo img {
border-radius: 15px;
}
</style>
</head>
<body>
<div class="container">
<div class="content">
<div class="logo"> <img src="logo.jpg" alt="logo" /> </div>
<!--logo-->
</div>
<!--content-->
</div>
<!--container-->
</body>
</html>

There are multiple ways how you can achieve this:
The first one is to add a class to the logo after pageload with JavaScript. You need to do this, because CSS transitions only react on changes like classlist changes, hover etc., but can not start by itself.
The second way is to use CSS keyframe animations, which I believe is more what you want. You can learn about it here: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_CSS_animations

#-webkit-keyframes anm {
0% {-webkit-transform: rotate(0deg);}
25% {-webkit-transform: rotate(180deg);}
50% {-webkit-transform: rotate(360deg);}
75% {-webkit-transform: rotate(540deg);}
100% {-webkit-transform: rotate(720deg);}
}
#keyframes anm {
0% {transform: rotate(0deg);}
25% {transform: rotate(180deg);}
50% {transform: rotate(360deg);}
75% {transform: rotate(540deg);}
100% {transform: rotate(720deg);}
}
.logo img {
height: 80px;
border-radius: 15px;
-webkit-animation: anm 1s;
animation: anm 1s;
}
.logo img:hover {
border-radius: 50%;
transition: all 1s ease 0s;
-webkit-transform: rotate(720deg);
transform: rotate(720deg);
}

It won't unless you use #keyframes CSS animations. you can use like mentioned below..
and use animation-rotate class in your img tag. Here is the Demo.
.animation-rotate {
margin:auto;
-webkit-animation:coinflip 2s infinite linear;
animation:coinflip 2s infinite linear;
-moz-animation:coinflip 2s infinite linear;
}
#-webkit-keyframes coinflip {
0% {
-webkit-transform:rotateY(-1deg);
}
100% {
-webkit-transform:rotateY(360deg);
}
}
#-moz-keyframes coinflip {
0% {
-moz-transform:rotateY(-1deg);
}
100% {
-moz-transform:rotateY(360deg);
}
}
#keyframes coinflip {
0% {
transform:rotateY(0deg);
}
100% {
transform:rotateY(360deg);
}
}