How to add function/element action after animate function runs in javascript? - javascript

I have tried searching on SO and google and cant seem to find a decent answer on this question.
I want to remove the element that is being animated after the animation is complete. After the single iteration, it puts the element back where it started. It seems to understand when the animation ends, where to add that last bit?
The code:
svg.animate([
// keyframes
{ transform: 'scale(2.5)'},
{ left: '50px',top:'175px',transform: 'scale(1.0)' }
], {
// timing options
duration: 600,
iterations: 1,
easing:'cubic-bezier(0.89, 0.41, 1, 0.95)'
})
What I want to add:
svg.remove()
Any ideas? thanks!

Use a promise:
Promise.all(
svg.getAnimations().map(
function(animation) {
return animation.finished
}
)
).then(
function() {
return svg.remove()
}
)

Look into animation events
Example:
HTML:
<button>Hello</button>
CSS:
#keyframes example {
from {background-color: red;}
to {background-color: yellow;}
}
button {
background-color: red;
animation-name: example;
animation-duration: 2s;
}
JS:
const button = document.querySelector("button");
button.addEventListener("animationend", () => { button.remove(); });
demo

Related

How to create button in javascript to preform flip of card on click

.thecard:hover {
transform: rotateY(180deg)
}
I want to perform this transform when the user will click on the card. I want to know how to make a javascript button that can perform this function when the user will click on a card.
you can make use of the the Javascript API element.animate() to add your keyframe animations and set how you want them to work. I would advise using a site like caniuseto see what browsers are compatible with the API.
let animation = document.getElementById("card")
//If you just want to click on the card to flip it
animation.addEventListener("click", turnCard)
function turnCard (){
animation.animate([
// keyframes
{ transform: 'perspective(400px) rotateY(0)' },
{ transform: 'perspective(400px) rotateY(180deg)' }
], {
// timing options
duration: 1000,
iterations: 1
})
}
//Using a button to flip the card
const cardFlipper = () =>{
animation.animate([
{ transform: 'perspective(400px) rotateY(0)' },
{ transform: 'perspective(400px) rotateY(180deg)' }
], {
duration: 1000,
iterations: 1
})
}
#card{
height: 400px;
background-color: blue;
width: 200px;
}
<div id="card">
</div>
<button onclick="cardFlipper()">Flip Card</button>

Flashing text on value change [duplicate]

I'm brand new to jQuery and have some experience using Prototype. In Prototype, there is a method to "flash" an element — ie. briefly highlight it in another color and have it fade back to normal so that the user's eye is drawn to it. Is there such a method in jQuery? I see fadeIn, fadeOut, and animate, but I don't see anything like "flash". Perhaps one of these three can be used with appropriate inputs?
My way is .fadein, .fadeout .fadein, .fadeout ......
$("#someElement").fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100);
function go1() { $("#demo1").fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100)}
function go2() { $('#demo2').delay(100).fadeOut().fadeIn('slow') }
#demo1,
#demo2 {
text-align: center;
font-family: Helvetica;
background: IndianRed;
height: 50px;
line-height: 50px;
width: 150px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button onclick="go1()">Click Me</button>
<div id='demo1'>My Element</div>
<br>
<button onclick="go2()">Click Me</button> (from comment)
<div id='demo2'>My Element</div>
You can use the jQuery Color plugin.
For example, to draw attention to all the divs on your page, you could use the following code:
$("div").stop().css("background-color", "#FFFF9C")
.animate({ backgroundColor: "#FFFFFF"}, 1500);
Edit - New and improved
The following uses the same technique as above, but it has the added benefits of:
parameterized highlight color and duration
retaining original background color, instead of assuming that it is white
being an extension of jQuery, so you can use it on any object
Extend the jQuery Object:
var notLocked = true;
$.fn.animateHighlight = function(highlightColor, duration) {
var highlightBg = highlightColor || "#FFFF9C";
var animateMs = duration || 1500;
var originalBg = this.css("backgroundColor");
if (notLocked) {
notLocked = false;
this.stop().css("background-color", highlightBg)
.animate({backgroundColor: originalBg}, animateMs);
setTimeout( function() { notLocked = true; }, animateMs);
}
};
Usage example:
$("div").animateHighlight("#dd0000", 1000);
You can use css3 animations to flash an element
.flash {
-moz-animation: flash 1s ease-out;
-moz-animation-iteration-count: 1;
-webkit-animation: flash 1s ease-out;
-webkit-animation-iteration-count: 1;
-ms-animation: flash 1s ease-out;
-ms-animation-iteration-count: 1;
}
#keyframes flash {
0% { background-color: transparent; }
50% { background-color: #fbf8b2; }
100% { background-color: transparent; }
}
#-webkit-keyframes flash {
0% { background-color: transparent; }
50% { background-color: #fbf8b2; }
100% { background-color: transparent; }
}
#-moz-keyframes flash {
0% { background-color: transparent; }
50% { background-color: #fbf8b2; }
100% { background-color: transparent; }
}
#-ms-keyframes flash {
0% { background-color: transparent; }
50% { background-color: #fbf8b2; }
100% { background-color: transparent; }
}
And you jQuery to add the class
jQuery(selector).addClass("flash");
After 5 years... (And no additional plugin needed)
This one "pulses" it to the color you want (e.g. white) by putting a div background color behind it, and then fading the object out and in again.
HTML object (e.g. button):
<div style="background: #fff;">
<input type="submit" class="element" value="Whatever" />
</div>
jQuery (vanilla, no other plugins):
$('.element').fadeTo(100, 0.3, function() { $(this).fadeTo(500, 1.0); });
element - class name
first number in fadeTo() - milliseconds for the transition
second number in fadeTo() - opacity of the object after fade/unfade
You may check this out in the lower right corner of this webpage: https://single.majlovesreg.one/v1/
Edit (willsteel) no duplicated selector by using $(this) and tweaked values to acutally perform a flash (as the OP requested).
You could use the highlight effect in jQuery UI to achieve the same, I guess.
If you're using jQueryUI, there is pulsate function in UI/Effects
$("div").click(function () {
$(this).effect("pulsate", { times:3 }, 2000);
});
http://docs.jquery.com/UI/Effects/Pulsate
$('#district').css({opacity: 0});
$('#district').animate({opacity: 1}, 700 );
Pure jQuery solution.
(no jquery-ui/animate/color needed.)
If all you want is that yellow "flash" effect without loading jquery color:
var flash = function(elements) {
var opacity = 100;
var color = "255, 255, 20" // has to be in this format since we use rgba
var interval = setInterval(function() {
opacity -= 3;
if (opacity <= 0) clearInterval(interval);
$(elements).css({background: "rgba("+color+", "+opacity/100+")"});
}, 30)
};
Above script simply does 1s yellow fadeout, perfect for letting the user know the element was was updated or something similar.
Usage:
flash($('#your-element'))
You could use this plugin (put it in a js file and use it via script-tag)
http://plugins.jquery.com/project/color
And then use something like this:
jQuery.fn.flash = function( color, duration )
{
var current = this.css( 'color' );
this.animate( { color: 'rgb(' + color + ')' }, duration / 2 );
this.animate( { color: current }, duration / 2 );
}
This adds a 'flash' method to all jQuery objects:
$( '#importantElement' ).flash( '255,0,0', 1000 );
You can extend Desheng Li's method further by allowing an iterations count to do multiple flashes like so:
// Extend jquery with flashing for elements
$.fn.flash = function(duration, iterations) {
duration = duration || 1000; // Default to 1 second
iterations = iterations || 1; // Default to 1 iteration
var iterationDuration = Math.floor(duration / iterations);
for (var i = 0; i < iterations; i++) {
this.fadeOut(iterationDuration).fadeIn(iterationDuration);
}
return this;
}
Then you can call the method with a time and number of flashes:
$("#someElementId").flash(1000, 4); // Flash 4 times over a period of 1 second
How about a really simple answer?
$('selector').fadeTo('fast',0).fadeTo('fast',1).fadeTo('fast',0).fadeTo('fast',1)
Blinks twice...that's all folks!
I can't believe this isn't on this question yet. All you gotta do:
("#someElement").show('highlight',{color: '#C8FB5E'},'fast');
This does exactly what you want it to do, is super easy, works for both show() and hide() methods.
This may be a more up-to-date answer, and is shorter, as things have been consolidated somewhat since this post. Requires jquery-ui-effect-highlight.
$("div").click(function () {
$(this).effect("highlight", {}, 3000);
});
http://docs.jquery.com/UI/Effects/Highlight
function pulse() {
$('.blink').fadeIn(300).fadeOut(500);
}
setInterval(pulse, 1000);
I was looking for a solution to this problem but without relying on jQuery UI.
This is what I came up with and it works for me (no plugins, just Javascript and jQuery);
-- Heres the working fiddle -- http://jsfiddle.net/CriddleCraddle/yYcaY/2/
Set the current CSS parameter in your CSS file as normal css, and create a new class that just handles the parameter to change i.e. background-color, and set it to '!important' to override the default behavior. like this...
.button_flash {
background-color: #8DABFF !important;
}//This is the color to change to.
Then just use the function below and pass in the DOM element as a string, an integer for the number of times you would want the flash to occur, the class you want to change to, and an integer for delay.
Note: If you pass in an even number for the 'times' variable, you will end up with the class you started with, and if you pass an odd number you will end up with the toggled class. Both are useful for different things. I use the 'i' to change the delay time, or they would all fire at the same time and the effect would be lost.
function flashIt(element, times, klass, delay){
for (var i=0; i < times; i++){
setTimeout(function(){
$(element).toggleClass(klass);
}, delay + (300 * i));
};
};
//Then run the following code with either another delay to delay the original start, or
// without another delay. I have provided both options below.
//without a start delay just call
flashIt('.info_status button', 10, 'button_flash', 500)
//with a start delay just call
setTimeout(function(){
flashIt('.info_status button', 10, 'button_flash', 500)
}, 4700);
// Just change the 4700 above to your liking for the start delay. In this case,
//I need about five seconds before the flash started.
Would a pulse effect(offline) JQuery plugin be appropriate for what you are looking for ?
You can add a duration for limiting the pulse effect in time.
As mentioned by J-P in the comments, there is now his updated pulse plugin.
See his GitHub repo. And here is a demo.
Found this many moons later but if anyone cares, it seems like this is a nice way to get something to flash permanently:
$( "#someDiv" ).hide();
setInterval(function(){
$( "#someDiv" ).fadeIn(1000).fadeOut(1000);
},0)
The following codes work for me. Define two fade-in and fade-out functions and put them in each other's callback.
var fIn = function() { $(this).fadeIn(300, fOut); };
var fOut = function() { $(this).fadeOut(300, fIn); };
$('#element').fadeOut(300, fIn);
The following controls the times of flashes:
var count = 3;
var fIn = function() { $(this).fadeIn(300, fOut); };
var fOut = function() { if (--count > 0) $(this).fadeOut(300, fIn); };
$('#element').fadeOut(300, fIn);
If including a library is overkill here is a solution that is guaranteed to work.
$('div').click(function() {
$(this).css('background-color','#FFFFCC');
setTimeout(function() { $(this).fadeOut('slow').fadeIn('slow'); } , 1000);
setTimeout(function() { $(this).css('background-color','#FFFFFF'); } , 1000);
});
Setup event trigger
Set the background color of block element
Inside setTimeout use fadeOut and fadeIn to create a little animation effect.
Inside second setTimeout reset default background color
Tested in a few browsers and it works nicely.
Like fadein / fadeout you could use animate css / delay
$(this).stop(true, true).animate({opacity: 0.1}, 100).delay(100).animate({opacity: 1}, 100).animate({opacity: 0.1}, 100).delay(100).animate({opacity: 1}, 100);
Simple and flexible
$("#someElement").fadeTo(3000, 0.3 ).fadeTo(3000, 1).fadeTo(3000, 0.3 ).fadeTo(3000, 1);
3000 is 3 seconds
From opacity 1 it is faded to 0.3, then to 1 and so on.
You can stack more of these.
Only jQuery is needed. :)
There is a workaround for the animate background bug. This gist includes an example of a simple highlight method and its use.
/* BEGIN jquery color */
(function(jQuery){jQuery.each(['backgroundColor','borderBottomColor','borderLeftColor','borderRightColor','borderTopColor','color','outlineColor'],function(i,attr){jQuery.fx.step[attr]=function(fx){if(!fx.colorInit){fx.start=getColor(fx.elem,attr);fx.end=getRGB(fx.end);fx.colorInit=true;}
fx.elem.style[attr]="rgb("+[Math.max(Math.min(parseInt((fx.pos*(fx.end[0]-fx.start[0]))+fx.start[0]),255),0),Math.max(Math.min(parseInt((fx.pos*(fx.end[1]-fx.start[1]))+fx.start[1]),255),0),Math.max(Math.min(parseInt((fx.pos*(fx.end[2]-fx.start[2]))+fx.start[2]),255),0)].join(",")+")";}});function getRGB(color){var result;if(color&&color.constructor==Array&&color.length==3)
return color;if(result=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color))
return[parseInt(result[1]),parseInt(result[2]),parseInt(result[3])];if(result=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(color))
return[parseFloat(result[1])*2.55,parseFloat(result[2])*2.55,parseFloat(result[3])*2.55];if(result=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))
return[parseInt(result[1],16),parseInt(result[2],16),parseInt(result[3],16)];if(result=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))
return[parseInt(result[1]+result[1],16),parseInt(result[2]+result[2],16),parseInt(result[3]+result[3],16)];if(result=/rgba\(0, 0, 0, 0\)/.exec(color))
return colors['transparent'];return colors[jQuery.trim(color).toLowerCase()];}
function getColor(elem,attr){var color;do{color=jQuery.curCSS(elem,attr);if(color!=''&&color!='transparent'||jQuery.nodeName(elem,"body"))
break;attr="backgroundColor";}while(elem=elem.parentNode);return getRGB(color);};var colors={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0],transparent:[255,255,255]};})(jQuery);
/* END jquery color */
/* BEGIN highlight */
jQuery(function() {
$.fn.highlight = function(options) {
options = (options) ? options : {start_color:"#ff0",end_color:"#fff",delay:1500};
$(this).each(function() {
$(this).stop().css({"background-color":options.start_color}).animate({"background-color":options.end_color},options.delay);
});
}
});
/* END highlight */
/* BEGIN highlight example */
$(".some-elements").highlight();
/* END highlight example */
https://gist.github.com/1068231
Unfortunately the top answer requires JQuery UI. http://api.jquery.com/animate/
Here is a vanilla JQuery solution
http://jsfiddle.net/EfKBg/
JS
var flash = "<div class='flash'></div>";
$(".hello").prepend(flash);
$('.flash').show().fadeOut('slow');
CSS
.flash {
background-color: yellow;
display: none;
position: absolute;
width: 100%;
height: 100%;
}
HTML
<div class="hello">Hello World!</div>
Here's a slightly improved version of colbeerhey's solution. I added a return statement so that, in true jQuery form, we chain events after calling the animation. I've also added the arguments to clear the queue and jump to the end of an animation.
// Adds a highlight effect
$.fn.animateHighlight = function(highlightColor, duration) {
var highlightBg = highlightColor || "#FFFF9C";
var animateMs = duration || 1500;
this.stop(true,true);
var originalBg = this.css("backgroundColor");
return this.css("background-color", highlightBg).animate({backgroundColor: originalBg}, animateMs);
};
This one will pulsate an element's background color until a mouseover event is triggered
$.fn.pulseNotify = function(color, duration) {
var This = $(this);
console.log(This);
var pulseColor = color || "#337";
var pulseTime = duration || 3000;
var origBg = This.css("background-color");
var stop = false;
This.bind('mouseover.flashPulse', function() {
stop = true;
This.stop();
This.unbind('mouseover.flashPulse');
This.css('background-color', origBg);
})
function loop() {
console.log(This);
if( !stop ) {
This.animate({backgroundColor: pulseColor}, pulseTime/3, function(){
This.animate({backgroundColor: origBg}, (pulseTime/3)*2, 'easeInCirc', loop);
});
}
}
loop();
return This;
}
Put this together from all of the above - an easy solution for flashing an element and return to the original bgcolour...
$.fn.flash = function (highlightColor, duration, iterations) {
var highlightBg = highlightColor || "#FFFF9C";
var animateMs = duration || 1500;
var originalBg = this.css('backgroundColor');
var flashString = 'this';
for (var i = 0; i < iterations; i++) {
flashString = flashString + '.animate({ backgroundColor: highlightBg }, animateMs).animate({ backgroundColor: originalBg }, animateMs)';
}
eval(flashString);
}
Use like this:
$('<some element>').flash('#ffffc0', 1000, 3);
Hope this helps!
Here's a solution that uses a mix of jQuery and CSS3 animations.
http://jsfiddle.net/padfv0u9/2/
Essentially you start by changing the color to your "flash" color, and then use a CSS3 animation to let the color fade out. You need to change the transition duration in order for the initial "flash" to be faster than the fade.
$(element).removeClass("transition-duration-medium");
$(element).addClass("transition-duration-instant");
$(element).addClass("ko-flash");
setTimeout(function () {
$(element).removeClass("transition-duration-instant");
$(element).addClass("transition-duration-medium");
$(element).removeClass("ko-flash");
}, 500);
Where the CSS classes are as follows.
.ko-flash {
background-color: yellow;
}
.transition-duration-instant {
-webkit-transition-duration: 0s;
-moz-transition-duration: 0s;
-o-transition-duration: 0s;
transition-duration: 0s;
}
.transition-duration-medium {
-webkit-transition-duration: 1s;
-moz-transition-duration: 1s;
-o-transition-duration: 1s;
transition-duration: 1s;
}
just give elem.fadeOut(10).fadeIn(10);
This is generic enough that you can write whatever code you like to animate. You can even decrease the delay from 300ms to 33ms and fade colors, etc.
// Flash linked to hash.
var hash = location.hash.substr(1);
if (hash) {
hash = $("#" + hash);
var color = hash.css("color"), count = 1;
function hashFade () {
if (++count < 7) setTimeout(hashFade, 300);
hash.css("color", count % 2 ? color : "red");
}
hashFade();
}
you can use jquery Pulsate plugin to force to focus the attention on any html element with control over speed and repeatation and color.
JQuery.pulsate() * with Demos
sample initializer:
$(".pulse4").pulsate({speed:2500})
$(".CommandBox button:visible").pulsate({ color: "#f00", speed: 200, reach: 85, repeat: 15 })

Looping javascript function

I have a script that creates a progress bar and is style with CSS. It works great, but once the bar reaches the end, it stops and I can not get the script to loop so that it starts again. How can I loop this script so that the progress bar starts over once it reaches the end?
<script type="text/javascript">
$(document).ready(function() {
var el = $(''#progress'');
el.animate({
width: "100%"
}, 40000);
});
</script>
<style>
#progressKeeper {background:#f2f2f2;display:none;width: 400px;height: 18px;border: 1px solid #CCC;-moz-border-radius:7px; border-radius:7px;color:#f2f2f2;font-family:Arial;font- weight:bold;font-style:italic;font-size:.9em;margin-bottom:2000px;}
#progress {background: #005c9e;width: 0;height: 17px;-moz-border-radius:7px; border- radius:7px;}
</style>
Drop the jQuery, use CSS3!
#progress {
animation:progress 40s linear infinite;
-webkit-animation:progress 40s linear infinite;
}
#keyframes progress {from {width:0} to {width:100%}}
#-webkit-keyframes progress {from {width:0} to {width:100%}}
If you must support outdated browsers... well, pass a callback to the animate function to tell it to start the animation again. Something like this:
$(function() {
var prog = $("#progress");
anim();
function anim() {
prog.css({width:0});
prog.animate({width:"100%"},40000,anim);
}
});
Make it a function and pass that function to your .animate call as completion handler. See jQuery().animate().
Something like:
$(document).ready(function() {
function animateProgressBar( ) {
$('#progress').width(0).animate({
width : "100%"
}, 40000, animateProgressBar);
}
animateProgressBar();
});
(Untested)

alternative to blink() method

I am in a need of having a blinking function in my application. Basically, I am creating a calculator and I need something like "|" to blink after the user inputs each numbers from the button. For firefox and opera, something like:
var str = "Hello world!";
document.write(str.blink());
This is exactly what I want. My problem is they don't work in Chrome, IE or safari. Is there any easy substitution for this or I have to create blinking functionality myself if I want my application to run on cross-browsers?
you could use just css3 :
#keyframes 'blink' {
0% { background: rgba(255,0,0,0.5); }
50% { background: rgba(255,0,0,0); }
100% { background: rgba(255,0,0,0.5); }
}
Try this-:SOLUTION NO 1
You can create your own custom blink function.This can also be done by creating css class and adding them to our element.
function blink()
{
setInterval(function () {
document.getElementById("blink").style.webkitTransitionDuration = "0.7s";
document.getElementById("blink").style.opacity = 0;
setTimeout(function () {
document.getElementById("blink").style.webkitTransitionDuration = "0.7s";
document.getElementById("blink").style.opacity = 1;
}, 700);
},1400);
}
OR
try this-->SOLUTION NO.2
JAVASCRIPT
function blink()
{
document.getElementById('blink').className = "animated blink_css";
}
In css
.animated {
-webkit-animation-fill-mode:both;
-moz-animation-fill-mode:both;
-ms-animation-fill-mode:both;
-o-animation-fill-mode:both;
animation-fill-mode:both;
-webkit-animation-duration:1s;
-moz-animation-duration:1s;
-ms-animation-duration:1s;
-o-animation-duration:1s;
animation-duration:1s;
}
#keyframes 'blink' {
0% { background: rgba(255,0,0,0.5); }
50% { background: rgba(255,0,0,0); }
100% { background: rgba(255,0,0,0.5);
}
//try moz for mozilla,o for opera and webkit for safari and chrome
.blink_css {
-webkit-animation-name: blink;
-moz-animation-name: blink;
-o-animation-name: blink;
animation-name: blink;
}
Both of them will work.Tested!!!
If you truly want cross-browser compatibility, you should use a library, jQuery for instance.
Here is a nice little script that accomplishes what you want- http://www.silverphp.com/simple-jquery-blink-script-alternative-to-html-blink-tag.html
On the other hand, if you prefer vanilla JS, you may have to implement it yourself. Maybe use setInterval() with a function that makes the element disappear?

Set the webkit-keyframes from/to parameter with JavaScript

Is there any way to set the from or to of a webkit-keyframe with JavaScript?
A solution of sorts:
var cssAnimation = document.createElement('style');
cssAnimation.type = 'text/css';
var rules = document.createTextNode('#-webkit-keyframes slider {'+
'from { left:100px; }'+
'80% { left:150px; }'+
'90% { left:160px; }'+
'to { left:150px; }'+
'}');
cssAnimation.appendChild(rules);
document.getElementsByTagName("head")[0].appendChild(cssAnimation);
Just adds a style definition to the header. Would be much cleaner/better to define it though the DOM if possible.
Edit: Error in Chrome with old method
You can use the CSS DOM interface. For instance:
<html>
<body>
<style>
#keyframes fadeout {
from { opacity:1; }
to { opacity:0; }
}
</style>
<script text="javascript">
var stylesheet = document.styleSheets[0];
var fadeOutRule = stylesheet.cssRules[0];
alert( fadeOutRule.name ); // alerts "fadeout"
var fadeOutRule_From = fadeOutRule.cssRules[0];
var fadeOutRule_To = fadeOutRule.cssRules[1];
alert( fadeOutRule_From.keyText ); // alerts "0%" ( and not "from" as you might expect)
alert( fadeOutRule_To.keyText ); // alerts "100%"
var fadeOutRule_To_Style = fadeOutRule_To.style;
alert( fadeOutRule_To_Style.cssText ); // alerts "opacity:0;"
fadeOutRule_To_Style.setProperty('color', 'red'); // add the style color:red
fadeOutRule_To_Style.removeProperty('opacity'); // remove the style opacity
alert( fadeOutRule_To_Style.cssText ); // alerts "color:red;"
</script>
</body>
</html>
This example covers several different browsers:
var keyFramePrefixes = ["-webkit-", "-o-", "-moz-", ""];
var keyFrames = [];
var textNode = null;
for (var i in keyFramePrefixes){
keyFrames = '#'+keyFramePrefixes[i]+'keyframes cloudsMove {'+
'from {'+keyFramePrefixes[i]+'transform: translate(0px,0px);}'+
'to {'+keyFramePrefixes[i]+'transform: translate(1440px'
'px,0px);}}';
textNode = document.createTextNode(keyFrames);
document.getElementsByTagName("style")[0].appendChild(textNode);
}
The way I handle this is to not set either the from or to of the element style I am manipulating in the css file and before triggering the animation I will set the element style that it should go to with javascript. This way you are free to dynamically manage what stuff should do until we can manage this directly in js. You only need to specify one of the two. The setTimeout allows the application of the css rule to the element before the animation is triggered otherwise you would have a race condition and it wouldn't animate.
#someDiv.slideIn {
-webkit-animation: slideIn 0.5s ease;
}
#-webkit-keyframes slideIn {
0% {
left:0px;
}
100% {}
}
var someDiv = document.getElementById('someDiv');
someDiv.style.left = '-50px';
setTimeout(function(){
someDiv.addClass('slideIn');
},0);
To solve this I added a 'webkit animation name' to my CSS selector and then created separate rules for my options, in my example red and yellow colouring:
.spinner {
-webkit-animation-name: spinnerColorRed;
}
#-webkit-keyframes spinnerColorRed {
from {
background-color: Black;
}
to {
background-color: Red;
}
}
#-webkit-keyframes spinnerColorYellow {
from {
background-color: Black;
}
to {
background-color: Yellow;
}
}
Then using jQuery:
$("#link").click(function(event) {
event.preventDefault();
$(".spinner").css("-webkit-animation-name", "spinnerColorYellow");
});
Yes, there is a way to do it dynamically with JavaScript. You can use css animation directives in native javascript code with the function Element.animate(). This approach is widely supported across browser, except for IE.
document.getElementById("tunnel").animate([
// keyframes
{ transform: 'translateY(0px)' },
{ transform: 'translateY(-300px)' }
], {
// timing options
duration: 1000,
iterations: Infinity
});
This function accepts two arguments - keyframes and options. Inside options you can specify the css animation parameters. Inside keyframes you can specify one or many transitional states. In your case with from and to you need two keyframes.

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