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<h1 id="animations">Animations</h1>
<p>Chart.js animates charts out of the box. A number of options are provided to configure how the animation looks and how long it takes</p>
<h2 id="animation-configuration">Animation Configuration</h2>
<p>The following animation options are available. The global options for are defined in <code>Chart.defaults.global.animation</code>.</p>
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>duration</code></td>
<td><code>Number</code></td>
<td><code>1000</code></td>
<td>The number of milliseconds an animation takes.</td>
</tr>
<tr>
<td><code>easing</code></td>
<td><code>String</code></td>
<td><code>'easeOutQuart'</code></td>
<td>Easing function to use. <a href="#easing">more...</a></td>
</tr>
<tr>
<td><code>onProgress</code></td>
<td><code>Function</code></td>
<td><code>null</code></td>
<td>Callback called on each step of an animation. <a href="#animation-callbacks">more...</a></td>
</tr>
<tr>
<td><code>onComplete</code></td>
<td><code>Function</code></td>
<td><code>null</code></td>
<td>Callback called at the end of an animation. <a href="#animation-callbacks">more...</a></td>
</tr>
</tbody>
</table>
<h2 id="easing">Easing</h2>
<p> Available options are:</p>
<ul>
<li><code>'linear'</code></li>
<li><code>'easeInQuad'</code></li>
<li><code>'easeOutQuad'</code></li>
<li><code>'easeInOutQuad'</code></li>
<li><code>'easeInCubic'</code></li>
<li><code>'easeOutCubic'</code></li>
<li><code>'easeInOutCubic'</code></li>
<li><code>'easeInQuart'</code></li>
<li><code>'easeOutQuart'</code></li>
<li><code>'easeInOutQuart'</code></li>
<li><code>'easeInQuint'</code></li>
<li><code>'easeOutQuint'</code></li>
<li><code>'easeInOutQuint'</code></li>
<li><code>'easeInSine'</code></li>
<li><code>'easeOutSine'</code></li>
<li><code>'easeInOutSine'</code></li>
<li><code>'easeInExpo'</code></li>
<li><code>'easeOutExpo'</code></li>
<li><code>'easeInOutExpo'</code></li>
<li><code>'easeInCirc'</code></li>
<li><code>'easeOutCirc'</code></li>
<li><code>'easeInOutCirc'</code></li>
<li><code>'easeInElastic'</code></li>
<li><code>'easeOutElastic'</code></li>
<li><code>'easeInOutElastic'</code></li>
<li><code>'easeInBack'</code></li>
<li><code>'easeOutBack'</code></li>
<li><code>'easeInOutBack'</code></li>
<li><code>'easeInBounce'</code></li>
<li><code>'easeOutBounce'</code></li>
<li><code>'easeInOutBounce'</code></li>
</ul>
<p>See <a href="http://robertpenner.com/easing/" target="_blank">Robert Penner's easing equations</a>.</p>
<h2 id="animation-callbacks">Animation Callbacks</h2>
<p>The <code>onProgress</code> and <code>onComplete</code> callbacks are useful for synchronizing an external draw to the chart animation. The callback is passed a <code>Chart.Animation</code> instance:</p>
<pre><code class="lang-javascript">{
<span class="hljs-comment">// Chart object</span>
chart: Chart,
<span class="hljs-comment">// Current Animation frame number</span>
currentStep: <span class="hljs-built_in">Number</span>,
<span class="hljs-comment">// Number of animation frames</span>
numSteps: <span class="hljs-built_in">Number</span>,
<span class="hljs-comment">// Animation easing to use</span>
easing: <span class="hljs-built_in">String</span>,
<span class="hljs-comment">// Function that renders the chart</span>
render: <span class="hljs-built_in">Function</span>,
<span class="hljs-comment">// User callback</span>
onAnimationProgress: <span class="hljs-built_in">Function</span>,
<span class="hljs-comment">// User callback</span>
onAnimationComplete: <span class="hljs-built_in">Function</span>
}
</code></pre>
<p>The following example fills a progress bar during the chart animation.</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> chart = <span class="hljs-keyword">new</span> Chart(ctx, {
type: <span class="hljs-string">'line'</span>,
data: data,
options: {
animation: {
onProgress: <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">animation</span>) </span>{
progress.value = animation.animationObject.currentStep / animation.animationObject.numSteps;
}
}
}
});
</code></pre>
<p>Another example usage of these callbacks can be found on <a href="https://github.com/chartjs/Chart.js/blob/master/samples/advanced/progress-bar.html" target="_blank">Github</a>: this sample displays a progress bar showing how far along the animation is.</p>
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