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<title>KUTE.js Core Engine Examples | Javascript Animation Engine</title>
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<a href="index.html"><h1>KUTE.<span>js</span></h1></a>
<ul class="nav">
<li class="btn-group"><a href="#" data-function="toggle">Features <span class="caret"></span></a>
<ul class="subnav">
<li><a href="features.html">Feature Overview</a></li>
<li><a href="properties.html">Supported Properties</a></li>
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<a href="#" data-function="toggle">Examples <span class="caret"></span></a>
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<li class="active"><a href="examples.html">Core Engine</a></li>
<li><a href="css.html">CSS Plugin </a></li>
<li><a href="svg.html">SVG Plugin </a></li>
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<li><a href="start.html">Getting Started</a></li>
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<li><a href="options.html">Tween Options</a></li>
<li><a href="easing.html">Easing Functions</a></li>
<li><a href="extend.html">Extend Guide</a></li>
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<li><a href="about.html">About</a></li>
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<div class="content-wrap">
<h2>Core Engine</h2>
<p>KUTE.js core engine can animate by itself a great deal of CSS properties as well as scroll. You can do it all with native Javascript or with jQuery, but before we head over to the more advanced examples, let's have a quick look at these two
basic examples here. <strong>Note</strong>: the examples are posted on <a href="http://codepen.io/thednp/pens/public/" target="_blank">codepen</a>.</p>
<h3>Basic Native Javascript Example</h3>
<p>When developing with native Javascript, a very basic syntax goes like this:</p>
<pre>
<code class="language-javascript">// this is the tween object, basically KUTE.method(element, from, to, options);
var tween = KUTE.fromTo('selector', {left: 0}, {left: 100}, {yoyo: true});</code>
</pre>
<p>Now the tween object is created, it's a good time for you to know that via Native Javascript we <strong>always</strong> animate the first HTML element only, even if you're using a class selector. To create/control a tween for multiple elements
such as <code>querySelectorAll()</code> or <code>getElementsByTagName()</code>, you need to do a <code>for ()</code> loop, or make use of the two new methods: <code>.allTo()</code> or <code>.allFromTo()</code>. Now let's apply the tween
control methods:</p>
<pre><code class="language-javascript">tween.start(); // starts the animation
tween.stop(); // stops current tween and all chained tweens animating
tween.pause(); // pauses current tween animation
tween.play(); // or tween.resume(); resumes current tween animation
tween.chain(tween2); // when tween animation finished, you can trigger the start of another tween
tween.playing // checks if the tween is currenlty active so we prevent start() when not needed
tween.paused // checks if the tween is currenlty active so we can prevent pausing or resume if needed
</code></pre>
<p>The demo for the above example is <a href="http://codepen.io/thednp/pen/Bozbgg" target="_blank">here</a>.</p>
<h3>Basic jQuery Example</h3>
<p>KUTE.js includes a jQuery Plugin to help you easily implement KUTE.js in your jQuery applications. When using jQuery, the syntax is familiar but works a bit different than plain Javascript due to jQuery's specific code standards. Let's have
a look:</p>
<pre><code class="language-javascript">// this is the tween object, basically $('selector').method(fromValues, toValue, options)
var tween = $('selector').fromTo({top: 20}, {top: 100}, {delay: 500});
</code></pre>
<p>We mentioned that the jQuery Plugin is different, and here's why: the above function call uses the <code>allFromTo</code> method to create an <code>Array</code> of objects for each <code>HTML</code> element of chosen selector, but if the selector
only returns one element the call returns a single tween object built with <code>fromTo</code> method. For the array of objects we can now apply the exact same tween control methods, except these:</p>
<pre><code class="language-javascript">tween.length // check if the tween is an array of objects
tween.length && tween.tweens[0].playing && tween.tweens[tween.length-1].playing // now we know that one of the tweens is playing
tween.length && tween.tweens[0].paused && tween.tweens[tween.length-1].paused // now we know that one of the tweens is paused
</code></pre>
<p>The demo for the above example is <a href="http://codepen.io/thednp/pen/rryWZQ" target="_blank">here</a>.</p>
<h3>Transform Properties Examples</h3>
<p>KUTE.js supports almost all about <code>transform</code> as described in the <a href="http://www.w3.org/TR/css3-transforms/" target="_blank">spec</a>: the 2D <code>translate</code>, <code>rotate</code>, <code>skewX</code>, <code>skewY</code> and <code>scale</code>, as well as the 3D <code>translateX</code>, <code>translateY</code>, <code>translateZ</code>, <code>translate3d</code>, <code>rotateX</code>, <code>rotateY</code>, <code>rotateZ</code> properties. Additionally it
allows you to set a <code>perspective</code> for the element or it's parent as well as a <code>perpective-origin</code> for the element or it's parent.</p>
<h4>Translations</h4>
<p>In the next example the first box is moving to left 250px with <code>translate</code> property, the second box is moving to the right by 200px using <code>translateX</code> and the third box is moving to the bottom using <code>translate3d</code>.
The last box also uses <code>translate3d</code> but requires a <code>perspective</code> value for the animation on the Z axis to be effective.</p>
<pre><code class="language-javascript">var tween1 = KUTE.fromTo('selector1',{translate:0},{translate:-250}); // or translate:[x,y] for both axis
var tween2 = KUTE.fromTo('selector2',{translateX:0},{translateX:200});
var tween3 = KUTE.fromTo('selector3',{translate3d:[0,0,0]},{translate3d:[0,100,0]});
var tween4 = KUTE.fromTo('selector4',{translate3d:[0,0,0]},{translate3d:[0,0,-100]},{parentPerspective: 100});
</code></pre>
<p>And here is how it looks like:</p>
<div id="translate-examples" class="featurettes">
<div class="example-item example-box bg-indigo">2D</div>
<div class="example-item example-box bg-olive">X</div>
<div class="example-item example-box bg-pink">Y</div>
<div class="example-item example-box bg-red">Z</div>
<div class="example-buttons">
<a class="btn btn-blue" href="javascript:void(0)">Start</a>
</div>
</div>
<p>As you can see in your browsers console, for all animations <code>translate3d</code> is used, as explained in the <a href="features.html">features page</a>. Also the first example that's using the 2D <code>translate</code> for both vertical
and horizontal axis even if we only set X axis. You can download this example <a href="http://codepen.io/thednp/share/zip/rOLbyY">here</a>.</p>
<p><strong>Remember</strong>: stacking <code>translate</code> and <code>translate3d</code> together may not work and IE9 does not support <code>perspective</code>.</p>
<h4>Rotations</h4>
<p>Next we're gonna animate 4 elements with one axis each element. Unlike translations, KUTE.js does not support <code>rotate3d</code>.</p>
<pre><code class="language-javascript">var tween1 = KUTE.fromTo('selector1',{rotate:0},{rotate:-720});
var tween2 = KUTE.fromTo('selector2',{rotateX:0},{rotateX:200});
var tween3 = KUTE.fromTo('selector3',{rotateY:0},{rotateY:160},{perspective:100});
var tween4 = KUTE.fromTo('selector4',{rotateZ:0},{rotateZ:360});
</code></pre>
<p>And here is how it looks like:</p>
<div id="rotExamples" class="featurettes">
<div class="example-item example-box bg-blue">2D</div>
<div class="example-item example-box bg-indigo">X</div>
<div data-option-perspective="200" class="example-item example-box bg-olive">Y</div>
<div class="example-item example-box bg-pink">Z</div>
<div class="example-buttons">
<a class="btn btn-green" href="javascript:void(0)">Start</a>
</div>
</div>
<p>The <code>rotateX</code> and <code>rotateY</code> are 3D based rotations, so they require a perspective in order to make the browser render proper 3D layers, but in the example they animate different because only the second, Y axis, uses a
<code>perspective</code> setting. The rotation on Z axis does not require a perspective. Unlike translations, you can stack all axis rotation for your animation, but we will see that in a later example. You can download this example <a
href="http://codepen.io/thednp/share/zip/NGrmMR">here</a>.</p>
<h4>Skews</h4>
<p>KUTE.js supports <code>skewX</code> and <code>skewY</code> so let's animate the two. Since they are 2D transformations, IE9 supports skews.</p>
<pre><code class="language-javascript">var tween1 = KUTE.fromTo('selector1',{skewX:0},{skewX:20});
var tween2 = KUTE.fromTo('selector2',{skewY:0},{skewY:45});
</code></pre>
<p>And here is how it looks like:</p>
<div id="skewExamples" class="featurettes">
<div class="example-item example-box bg-teal">X</div>
<div class="example-item example-box bg-green">Y</div>
<div class="example-buttons">
<a class="btn btn-yellow" href="javascript:void(0)">Start</a>
</div>
</div>
<p>You can download this example <a href='http://codepen.io/thednp/share/zip/wKWbKd/'>here</a>.</p>
<h4>Mixed Transformations</h4>
<p>The current specification does not support animating different transform properties with multiple tween objects at the same time, you must stack them all together into a single object. See the example below:</p>
<pre><code class="language-javascript">var tween1 = KUTE.fromTo('selector1',{rotateX:0},{rotateX:20}).start();
var tween2 = KUTE.fromTo('selector1',{skewY:0},{skewY:45}).start();
</code></pre>
<p>If you check the <a href="http://codepen.io/thednp/pen/avZrYo" target="_blank">test here</a>, you will notice that only the <code>skewY</code> is going to work and no rotation. Now let's do this properly.</p>
<pre><code class="language-javascript">var tween1 = KUTE.fromTo(
'selector1', // element
{translateX:0, rotateX:0, rotateY:0, rotateZ:0}, // from
{translateX:250, rotateX:360, rotateY:15, rotateZ:5}, // to
{perspective:400, perspectiveOrigin: 'center top'} // transform options
);
var tween2 = KUTE.fromTo(
'selector2', // element
{translateX:0, rotateX:0, rotateY:0, rotateZ:0}, // from values
{translateX:-250, rotateX:360, rotateY:15, rotateZ:5}, // to values
{parentPerspective:400, parentPerspectiveOrigin: 'center top'} // transform options
);
</code></pre>
<p>Now you can see we are using the specific transform options, the first tween object uses these settings for an element and the second for its parent.</p>
<div id="mixTransforms" class="featurettes">
<div class="example-item example-box bg-pink" style="line-height: 50px; font-size: 25px;">element perspective 400px</div>
<div class="example-item example-box bg-orange" style="line-height: 50px; font-size: 25px;">parent perspective 400px</div>
<div class="example-buttons">
<a class="btn btn-olive" href="javascript:void(0)">Start</a>
</div>
</div>
<p>This example also shows the difference between an element's perspective and a parent's perspective. You can download the above example <a href='http://codepen.io/thednp/share/zip/jbrovv/'>here</a>.</p>
<h4>Chained Transformations</h4>
<p>KUTE.js has the ability to stack transform properties as they come in chained tweens because when we run animations one after another we are kinda expecting a certain degree of continuity. As explained before, the best solution is the <code>.to()</code> method because it has the ability to <strong>stack</strong> properties found in the element's inline styling, mostly from previous tween animation, and use them as start values for the next tween. It also transfers unchanged values to
values end for that same reason. OK now, let's see a side by side comparison with 3 elements:</p>
<div id="chainedTweens" class="featurettes">
<div class="example-item example-box bg-gray" style="font-size: 30px">FROMTO</div>
<div class="example-item example-box bg-olive" style="font-size: 30px">FROMTO</div>
<div class="example-item example-box bg-indigo" style="font-size: 30px">TO</div>
<div class="example-buttons">
<a class="btn btn-blue" href="#">Start</a>
</div>
</div>
<p>What's this all about?</p>
<ul>
<li>the first box uses a regular <code class="bg-gray">.fromTo()</code> object, we are doing things normally, we would expect them to work properly but due to the nature of the transforms, this is what it does</li>
<li>the second box is also using <code class="bg-olive">.fromTo()</code> object, but using proper values for all tweens at all times, so we fixed that glitch</li>
<li>and the last box uses the <code class="bg-indigo">.to()</code> method, and does the chaining easier for most properties, especially for <code>transform</code></li>
</ul>
<p>When coding transformation chains I would highly recommend:</p>
<ul>
<li>keep the same order of the transform properties, best would be: translation, rotation, skew and scale; an example of the difference shown <a href="http://jsfiddle.net/nvy26bgb/" target="_blank">here</a> for rotations and
<a href="http://jsfiddle.net/nvy26bgb/1/"
target="_blank">here</a> for rotations and skew;</li>
<li>2D and 3D translations would work best in if you provide a value at all times; eg. <code>translate:[x,y]</code> and <code>translate3d:[x,y,z]</code>; for instance using <code>translate:150</code> or <code>translateX:150</code> would mean
that all other axis are 0;</li>
<li>on larger amount of elements animating chains, the <code>.fromTo()</code> method is fastest, so you will have more work, but can potentially minimize or eliminate any syncronization issues that may occur, as explained in the <a href="features.html">features page</a>;</li>
<li>download this example <a href='http://codepen.io/thednp/share/zip/PPWZRL/'>here</a>.</li>
</ul>
<h3>Box Model Properties</h3>
<p>KUTE.js core engine supports most used box model properties, and almost all the box model properties via the <a href="css.html">CSS Plugin</a>, so the next example will only animate <code>width</code>, <code>height</code>, <code>top</code> and <code>left</code>.</p>
<pre><code class="language-javascript">var tween1 = KUTE.to('selector1',{width:200});
var tween2 = KUTE.to('selector1',{height:300});
var tween3 = KUTE.to('selector1',{left:250});
var tween4 = KUTE.to('selector1',{top:100});
</code></pre>
<p>We're gonna chain these tweens and start the animation. You can download this example <a href='http://codepen.io/thednp/share/zip/xwqYbX/'>here</a>.</p>
<div id="boxModel" class="featurettes">
<div class="example-item example-box bg-lime" style="line-height: 75px; font-size:30px">BOX MODEL</div>
<div class="example-buttons">
<a class="btn btn-orange" href="#">Start</a>
</div>
</div>
<p>TIP: the <code>width</code> and <code>height</code> properties used together can be great for <code>scale</code> animation fallback on images for legacy browsers.</p>
<h3>Color Properties</h3>
<p>The next example is about animating color properties. As for example, check these lines for reference. Additional color properties such as <code>borderColor</code> or <code>borderLeftColor</code> are supported via the <a href="css.html">CSS Plugin</a>.</p>
<pre><code class="language-javascript">KUTE.to('selector1',{color:'rgb(0,66,99)'}).start();
KUTE.to('selector1',{backgroundColor:'#069'}).start();
KUTE.to('selector1',{backgroundColor:'turquoise'}).start(); // IE9+ only
</code></pre>
<p>Let's get some animation going. Download the example <a href='http://codepen.io/thednp/share/zip/OypvNR/'>here</a>.</p>
<div id="colBox" class="featurettes">
<div class="example-item example-box bg-olive">Colors</div>
<div class="example-buttons">
<a class="btn btn-blue" href="#">Start</a>
</div>
</div>
<p>A quick reminder: you can also use <code>RGB</code> or <code>RGBA</code>, but the last one is not supported on IE8 and it will fallback to <code>RGB</code>.</p>
<h3>Vertical Scrolling</h3>
<p>Another property we can animate with KUTE.js is <code>scrollTop</code>. I works for both the window and any scrollable object. Quick example:</p>
<pre><code class="language-javascript">KUTE.to('selector',{scroll:450}).start(); // for a scrollable element
KUTE.to('window',{scroll:450}).start(); // for the window
</code></pre>
<p>The scroll animation could however be influenced by mouse hover effects, usually creating some really nasty bottlenecks, but you can always add some CSS to your page to prevent that:</p>
<pre><code class="language-css">/* prevent scroll bottlenecks */
body[data-tweening="scroll"],
body[data-tweening="scroll"] * { pointer-events: none !important; }
</code></pre>
<p>A working example would work like <a href="http://codepen.io/thednp/pen/bVqKmp/" target="_blank">this</a>. Scroll works with IE8+ and is a unitless property even if these scroll distances are measured in pixels.</p>
<h3 id="crossbrowser">Cross Browser Animation Example</h3>
<p>Unlike the examples <a href="http://codepen.io/thednp/pens/public/" target="_blank">hosted on Codepen</a>, most examples here should be supported on legacy browsers. The next example is going to explain more details about how to target browsers according to their supported properties, so stick around. So, if your target audience uses legacy browsers in a significant percent, check to have the proper polyfills and also make sure you target your browsers, here's a <a href="http://browserhacks.com/" target="_blank">complete reference</a>. Now we are ready:</p>
<h4>Collect Information And Cache It</h4>
<pre><code class="language-javascript">// grab an HTML element to build a tween object for it
var element = document.getElementById("myElement");
// check for IE legacy browsers
var isIE = (new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})").exec(navigator.userAgent) != null) ? parseFloat( RegExp.$1 ) : false;
var isIE8 = isIE === 8;
var isIE9 = isIE === 9;
// most browsers have specific checks, so make sure
// you include all you need for your target audience
</code></pre>
<h4>Define Properties And Options Objects</h4>
<pre><code class="language-javascript">// create values and options objects
var startValues = {};
var endValues = {};
var options = {};
// here we define properties that are commonly supported
startValues.backgroundColor = 'rgba(255,214,38,1)'; endValues.backgroundColor = 'rgba(236,30,113,0.1)';
// here we define the properties according to the target browsers
if (isIE8) { // or any other browser that doesn"t support transforms
startValues.left = 0;
endValues.left = 250;
// for IE we override color values
startValues.backgroundColor = '#CDDC39';
endValues.backgroundColor = '#ec1e71';
// IE8 also doesn't support RGBA, we set to animate the opacity of the element
startValues.opacity = 1;
endValues.opacity = 0.2;
} else if (isIE9) { // or any other browser that only support 2d transforms
startValues.translate = 0; // 2d translate on X axis
endValues.translate = 250;
startValues.rotate = -180; // 2d rotation on Z axis
endValues.rotate = 0;
startValues.scale = 1; // 2d scale
endValues.scale = 1.5;
} else { // most modern browsers
startValues.translate3d = [0,0,0]; //3d translation on X axis
endValues.translate3d = [250,0,0];
startValues.rotateZ = -180; // 3d rotation on Z axis
endValues.rotateZ = 0;
startValues.rotateX = -20; // 3d rotation on X axis
endValues.rotateX = 0;
startValues.scale = 1; // 2d scale
endValues.scale = 1.5;
options.perspective = 400; // 3d transform option
}
// common tween options
options.easing = "easingCubicOut";
options.duration = 2500;
options.yoyo = true;
options.repeat = 1;
</code></pre>
<h4>Build Tween Object And Tween Controls</h4>
<pre><code class="language-javascript">// the cached object
var myTween = KUTE.fromTo(element, startValues, endValues, options);
// trigger buttons
var startButton = document.getElementById('startButton'),
stopButton = document.getElementById('stopButton'),
playPauseButton = document.getElementById('playPauseButton');
// add handlers for the trigger buttons
startButton.addEventListener('click', function(e){
e.preventDefault();
if (!myTween.playing) { myTween.start(); } // only start the animation if hasn't started yet
}, false);
stopButton.addEventListener('click', function(e){
e.preventDefault();
if (myTween.playing) { myTween.stop(); } // only stop the animation if there is any
}, false);
playPauseButton.addEventListener('click', function(e){
e.preventDefault();
if (!myTween.paused && myTween.playing) {
myTween.pause(); playPauseButton.innerHTML = 'Resume';
} else {
myTween.resume();
playPauseButton.innerHTML = 'Pause';
}
}, false);
</code></pre>
<h4>Live Demo</h4>
<div class="featurettes" id="crossBrowser">
<div id="myElement" class="example-item example-box bg-yellow">
</div>
<div class="example-buttons">
<a id="playPauseButton" class="btn btn-orange" href="#">Pause</a>
<a id="startButton" class="btn btn-blue" href="#">Start</a>
<a id="stopButton" class="btn btn-red" href="#">Stop</a>
</div>
</div>
<p>Let's explain this code a bit. KUTE.js gives you the internal variables <code>myTween.playing</code> and <code>myTween.paused</code> (both true/false) to help you easily manage the tween control methods all together as in this example
here. As said before, KUTE.js version 0.9.5 doesn't stat animating by default, for all the examples on this page you have to start it yourself, unlike their versions hosted on Codepen.</p>
<p>Also please know that opacity animation only works on Internet Explorer 8 if the target element uses <code>float: left/right</code>, <code>display: block</code> or <code>display: inline-block</code>.</p>
<ul>
<li>the <code class="bg-blue">START</code> button will use the <code>.start()</code> method and the animation starts;</li>
<li>the <code class="bg-red">STOP</code> button will use the <code>.stop()</code> method and stops the animation; after this the, animation can only be started again</li>
<li>the <code class="bg-orange">PAUSE</code> button will use the <code>.pause()</code> method and pauses the animation; this also changes the button's text and functionality;</li>
<li>the <code class="bg-olive">RESUME</code> button will use the <code>.resume()</code> method and resumes the animation; this reverses the button's initial state;</li>
<li>make sure you work with the conditions properly when you want to pause an animation you MUST check both <code>!myTween.playing</code> and <code>myTween.paused</code> conditions because you could end up with errors.</li>
</ul>
<h3>Tween Object Collections</h3>
<p>With KUTE.js 1.5.0 new tween object constructor methods were introduced, and they allow you to create a tween object for each element in a collection, a very handy way to ease and speed up the animation programing workflow. Let's have
a little fun.</p>
<pre><code class="language-javascript">// a simple .to() for a collection of elements would look like this
var myMultiTween1 = KUTE.allTo('selector1',{translate:[0,150]});
// or a more complex .fromTo() example with the two new options
var myMultiTween2 = KUTE.allFromTo(
'selector2',
{translate:[0,0], rotate: 0},
{translate:[0,150], rotate: 360},
{transformOrigin: '10% 10%', offset: 200 }
);
</code></pre>
<p>And should looks like this:</p>
<div class="featurettes">
<div class="example-item example-box example-multi bg-indigo">K</div>
<div class="example-item example-box example-multi bg-olive">U</div>
<div class="example-item example-box example-multi bg-pink">T</div>
<div class="example-item example-box example-multi bg-red">E</div>
<div class="example-buttons">
<a class="btn btn-green" onclick="startMultiTween();" href="javascript:void(0)">Start</a>
</div>
</div>
<p>As you can see, we also used the new tween options <code>offset</code> and <code>transformOrigin</code> and they make it so much more easy.</p>
<h3>Easing Functions</h3>
<p>KUTE.js core engine comes with Robert Penner's easing functions, but it can also work with any other easing functions, including custom functions. In the example below the first box animation uses the <code>linear</code> easing function
and the second will use another function you choose.</p>
<div class="featurettes">
<div class="example-item easing-example example-box bg-green">Linear</div>
<div class="example-item easing-example example-box bg-pink"></div>
<div class="example-buttons">
<div class="btn-group">
<a id="easingSelectButton" class="btn btn-red" data-function="toggle" href="#">Select</a>
<ul id="easings">
<li>easingSinusoidalIn</li>
<li>easingSinusoidalOut</li>
<li>easingSinusoidalInOut</li>
<li>easingQuadraticIn</li>
<li>easingQuadraticOut</li>
<li>easingQuadraticInOut</li>
<li>easingCubicIn</li>
<li>easingCubicOut</li>
<li>easingCubicInOut</li>
<li>easingQuarticIn</li>
<li>easingQuarticOut</li>
<li>easingQuarticInOut</li>
<li>easingQuinticIn</li>
<li>easingQuinticOut</li>
<li>easingQuinticInOut</li>
<li>easingCircularIn</li>
<li>easingCircularOut</li>
<li>easingCircularInOut</li>
<li>easingExponentialIn</li>
<li>easingExponentialOut</li>
<li>easingExponentialInOut</li>
<li>easingBackIn</li>
<li>easingBackOut</li>
<li>easingBackInOut</li>
<li>easingElasticIn</li>
<li>easingElasticOut</li>
<li>easingElasticInOut</li>
</ul>
</div>
<a id="startEasingTween" class="btn btn-blue" href="#">Start</a>
</div>
</div>
<p>For more examples and info about the other easing functions, head over to the <a href="easing.html">easing examples</a> page.</p>
</div>
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