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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Easing · React Native</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="The `Easing` module implements common easing functions. This module is used by [Animated.timing()](/docs/animated#timing) to convey physically believable motion in animations."/><meta name="docsearch:version" content="0.63"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Easing · React Native"/><meta property="og:type" content="website"/><meta property="og:url" content="https://reactnative.dev/"/><meta property="og:description" content="The `Easing` module implements common easing functions. This module is used by [Animated.timing()](/docs/animated#timing) to convey physically believable motion in animations."/><meta property="og:image" content="https://reactnative.dev/img/logo-og.png"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://reactnative.dev/img/logo-og.png"/><link rel="shortcut icon" href="/img/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/solarized-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://reactnative.dev/blog/atom.xml" title="React Native Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://reactnative.dev/blog/feed.xml" title="React Native Blog RSS Feed"/><script>
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</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/facebook/react-native-website/blob/master/docs/easing.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Easing</h1></header><article><div><span><p>The <code>Easing</code> module implements common easing functions. This module is used by <a href="/docs/animated#timing">Animated.timing()</a> to convey physically believable motion in animations.</p>
<p>You can find a visualization of some common easing functions at <a href="http://easings.net/">http://easings.net/</a></p>
<h3><a class="anchor" aria-hidden="true" id="predefined-animations"></a><a href="#predefined-animations" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Predefined animations</h3>
<p>The <code>Easing</code> module provides several predefined animations through the following methods:</p>
<ul>
<li><a href="/docs/easing#back"><code>back</code></a> provides a basic animation where the object goes slightly back before moving forward</li>
<li><a href="/docs/easing#bounce"><code>bounce</code></a> provides a bouncing animation</li>
<li><a href="/docs/easing#ease"><code>ease</code></a> provides a basic inertial animation</li>
<li><a href="/docs/easing#elastic"><code>elastic</code></a> provides a basic spring interaction</li>
</ul>
<h3><a class="anchor" aria-hidden="true" id="standard-functions"></a><a href="#standard-functions" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Standard functions</h3>
<p>Three standard easing functions are provided:</p>
<ul>
<li><a href="/docs/easing#linear"><code>linear</code></a></li>
<li><a href="/docs/easing#quad"><code>quad</code></a></li>
<li><a href="/docs/easing#cubic"><code>cubic</code></a></li>
</ul>
<p>The <a href="/docs/easing#poly"><code>poly</code></a> function can be used to implement quartic, quintic, and other higher power functions.</p>
<h3><a class="anchor" aria-hidden="true" id="additional-functions"></a><a href="#additional-functions" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Additional functions</h3>
<p>Additional mathematical functions are provided by the following methods:</p>
<ul>
<li><a href="/docs/easing#bezier"><code>bezier</code></a> provides a cubic bezier curve</li>
<li><a href="/docs/easing#circle"><code>circle</code></a> provides a circular function</li>
<li><a href="/docs/easing#sin"><code>sin</code></a> provides a sinusoidal function</li>
<li><a href="/docs/easing#exp"><code>exp</code></a> provides an exponential function</li>
</ul>
<p>The following helpers are used to modify other easing functions.</p>
<ul>
<li><a href="/docs/easing#in"><code>in</code></a> runs an easing function forwards</li>
<li><a href="/docs/easing#inout"><code>inOut</code></a> makes any easing function symmetrical</li>
<li><a href="/docs/easing#out"><code>out</code></a> runs an easing function backwards</li>
</ul>
<h2><a class="anchor" aria-hidden="true" id="example"></a><a href="#example" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Example</h2>
<div class="snack-player"><div class="mobile-friendly-snack" style="display: none"><pre><code class="hljs css javascript"><span class="hljs-keyword">import</span> React <span class="hljs-keyword">from</span> <span class="hljs-string">"react"</span>;
<span class="hljs-keyword">import</span> { Animated, Easing, SectionList, StatusBar, StyleSheet, Text, TouchableOpacity, View } <span class="hljs-keyword">from</span> <span class="hljs-string">"react-native"</span>;
<span class="hljs-keyword">const</span> App = <span class="hljs-function"><span class="hljs-params">()</span> =&gt;</span> {
<span class="hljs-keyword">let</span> opacity = <span class="hljs-keyword">new</span> Animated.Value(<span class="hljs-number">0</span>);
<span class="hljs-keyword">const</span> animate = <span class="hljs-function"><span class="hljs-params">easing</span> =&gt;</span> {
opacity.setValue(<span class="hljs-number">0</span>);
Animated.timing(opacity, {
<span class="hljs-attr">toValue</span>: <span class="hljs-number">1</span>,
<span class="hljs-attr">duration</span>: <span class="hljs-number">1200</span>,
easing
}).start();
};
<span class="hljs-keyword">const</span> size = opacity.interpolate({
<span class="hljs-attr">inputRange</span>: [<span class="hljs-number">0</span>, <span class="hljs-number">1</span>],
<span class="hljs-attr">outputRange</span>: [<span class="hljs-number">0</span>, <span class="hljs-number">80</span>]
});
<span class="hljs-keyword">const</span> animatedStyles = [
styles.box,
{
opacity,
<span class="hljs-attr">width</span>: size,
<span class="hljs-attr">height</span>: size
}
];
<span class="hljs-keyword">return</span> (
&lt;View style={styles.container}&gt;
&lt;StatusBar hidden={true} /&gt;
&lt;Text style={styles.title}&gt;
Press rows below to preview the Easing!
&lt;/Text&gt;
&lt;View style={styles.boxContainer}&gt;
&lt;Animated.View style={animatedStyles} /&gt;
&lt;/View&gt;
&lt;SectionList
style={styles.list}
sections={SECTIONS}
keyExtractor={(item) =&gt; item.title}
renderItem={({ item }) =&gt; (
&lt;TouchableOpacity
onPress={() =&gt; animate(item.easing)}
style={styles.listRow}
&gt;
&lt;Text&gt;{item.title}&lt;/Text&gt;
&lt;/TouchableOpacity&gt;
)}
renderSectionHeader={({ section: { title } }) =&gt; (
&lt;Text style={styles.listHeader}&gt;{title}&lt;/Text&gt;
)}
/&gt;
&lt;/View&gt;
);
};
const SECTIONS = [
{
title: "Predefined animations",
data: [
{ title: "Bounce", easing: Easing.bounce },
{ title: "Ease", easing: Easing.ease },
{ title: "Elastic", easing: Easing.elastic(4) }
]
},
{
title: "Standard functions",
data: [
{ title: "Linear", easing: Easing.linear },
{ title: "Quad", easing: Easing.quad },
{ title: "Cubic", easing: Easing.cubic }
]
},
{
title: "Additional functions",
data: [
{
title: "Bezier",
easing: Easing.bezier(0, 2, 1, -1)
},
{ title: "Circle", easing: Easing.circle },
{ title: "Sin", easing: Easing.sin },
{ title: "Exp", easing: Easing.exp }
]
},
{
title: "Combinations",
data: [
{
title: "In + Bounce",
easing: Easing.in(Easing.bounce)
},
{
title: "Out + Exp",
easing: Easing.out(Easing.exp)
},
{
title: "InOut + Elastic",
easing: Easing.inOut(Easing.elastic(1))
}
]
}
];
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: "#20232a"
},
title: {
marginTop: 10,
textAlign: "center",
color: "#61dafb"
},
boxContainer: {
height: 160,
alignItems: "center"
},
box: {
marginTop: 32,
borderRadius: 4,
backgroundColor: "#61dafb"
},
list: {
backgroundColor: "#fff"
},
listHeader: {
paddingHorizontal: 8,
paddingVertical: 4,
backgroundColor: "#f4f4f4",
color: "#999",
fontSize: 12,
textTransform: "uppercase"
},
listRow: {
padding: 8
}
});
export default App;
</code></pre></div><div class="desktop-friendly-snack" style="margin-top: 15px; margin-bottom: 15px"><div
data-snack-name="Easing Demo"
data-snack-description="Example usage"
data-snack-code="import%20React%20from%20%22react%22%3B%0Aimport%20%7B%20Animated%2C%20Easing%2C%20SectionList%2C%20StatusBar%2C%20StyleSheet%2C%20Text%2C%20TouchableOpacity%2C%20View%20%7D%20from%20%22react-native%22%3B%0A%0Aconst%20App%20%3D%20()%20%3D%3E%20%7B%0A%20%20let%20opacity%20%3D%20new%20Animated.Value(0)%3B%0A%0A%20%20const%20animate%20%3D%20easing%20%3D%3E%20%7B%0A%20%20%20%20opacity.setValue(0)%3B%0A%20%20%20%20Animated.timing(opacity%2C%20%7B%0A%20%20%20%20%20%20toValue%3A%201%2C%0A%20%20%20%20%20%20duration%3A%201200%2C%0A%20%20%20%20%20%20easing%0A%20%20%20%20%7D).start()%3B%0A%20%20%7D%3B%0A%0A%20%20const%20size%20%3D%20opacity.interpolate(%7B%0A%20%20%20%20inputRange%3A%20%5B0%2C%201%5D%2C%0A%20%20%20%20outputRange%3A%20%5B0%2C%2080%5D%0A%20%20%7D)%3B%0A%0A%20%20const%20animatedStyles%20%3D%20%5B%0A%20%20%20%20styles.box%2C%0A%20%20%20%20%7B%0A%20%20%20%20%20%20opacity%2C%0A%20%20%20%20%20%20width%3A%20size%2C%0A%20%20%20%20%20%20height%3A%20size%0A%20%20%20%20%7D%0A%20%20%5D%3B%0A%0A%20%20return%20(%0A%20%20%20%20%3CView%20style%3D%7Bstyles.container%7D%3E%0A%20%20%20%20%20%20%3CStatusBar%20hidden%3D%7Btrue%7D%20%2F%3E%0A%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.title%7D%3E%0A%20%20%20%20%20%20%20%20Press%20rows%20below%20to%20preview%20the%20Easing!%0A%20%20%20%20%20%20%3C%2FText%3E%0A%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.boxContainer%7D%3E%0A%20%20%20%20%20%20%20%20%3CAnimated.View%20style%3D%7BanimatedStyles%7D%20%2F%3E%0A%20%20%20%20%20%20%3C%2FView%3E%0A%20%20%20%20%20%20%3CSectionList%0A%20%20%20%20%20%20%20%20style%3D%7Bstyles.list%7D%0A%20%20%20%20%20%20%20%20sections%3D%7BSECTIONS%7D%0A%20%20%20%20%20%20%20%20keyExtractor%3D%7B(item)%20%3D%3E%20item.title%7D%0A%20%20%20%20%20%20%20%20renderItem%3D%7B(%7B%20item%20%7D)%20%3D%3E%20(%0A%20%20%20%20%20%20%20%20%20%20%3CTouchableOpacity%0A%20%20%20%20%20%20%20%20%20%20%20%20onPress%3D%7B()%20%3D%3E%20animate(item.easing)%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20style%3D%7Bstyles.listRow%7D%0A%20%20%20%20%20%20%20%20%20%20%3E%0A%20%20%20%20%20%20%20%20%20%20%20%20%3CText%3E%7Bitem.title%7D%3C%2FText%3E%0A%20%20%20%20%20%20%20%20%20%20%3C%2FTouchableOpacity%3E%0A%20%20%20%20%20%20%20%20)%7D%0A%20%20%20%20%20%20%20%20renderSectionHeader%3D%7B(%7B%20section%3A%20%7B%20title%20%7D%20%7D)%20%3D%3E%20(%0A%20%20%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.listHeader%7D%3E%7Btitle%7D%3C%2FText%3E%0A%20%20%20%20%20%20%20%20)%7D%0A%20%20%20%20%20%20%2F%3E%0A%20%20%20%20%3C%2FView%3E%0A%20%20)%3B%0A%7D%3B%0A%0Aconst%20SECTIONS%20%3D%20%5B%0A%20%20%7B%0A%20%20%20%20title%3A%20%22Predefined%20animations%22%2C%0A%20%20%20%20data%3A%20%5B%0A%20%20%20%20%20%20%7B%20title%3A%20%22Bounce%22%2C%20easing%3A%20Easing.bounce%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Ease%22%2C%20easing%3A%20Easing.ease%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Elastic%22%2C%20easing%3A%20Easing.elastic(4)%20%7D%0A%20%20%20%20%5D%0A%20%20%7D%2C%0A%20%20%7B%0A%20%20%20%20title%3A%20%22Standard%20functions%22%2C%0A%20%20%20%20data%3A%20%5B%0A%20%20%20%20%20%20%7B%20title%3A%20%22Linear%22%2C%20easing%3A%20Easing.linear%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Quad%22%2C%20easing%3A%20Easing.quad%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Cubic%22%2C%20easing%3A%20Easing.cubic%20%7D%0A%20%20%20%20%5D%0A%20%20%7D%2C%0A%20%20%7B%0A%20%20%20%20title%3A%20%22Additional%20functions%22%2C%0A%20%20%20%20data%3A%20%5B%0A%20%20%20%20%20%20%7B%0A%20%20%20%20%20%20%20%20title%3A%20%22Bezier%22%2C%0A%20%20%20%20%20%20%20%20easing%3A%20Easing.bezier(0%2C%202%2C%201%2C%20-1)%0A%20%20%20%20%20%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Circle%22%2C%20easing%3A%20Easing.circle%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Sin%22%2C%20easing%3A%20Easing.sin%20%7D%2C%0A%20%20%20%20%20%20%7B%20title%3A%20%22Exp%22%2C%20easing%3A%20Easing.exp%20%7D%0A%20%20%20%20%5D%0A%20%20%7D%2C%0A%20%20%7B%0A%20%20%20%20title%3A%20%22Combinations%22%2C%0A%20%20%20%20data%3A%20%5B%0A%20%20%20%20%20%20%7B%0A%20%20%20%20%20%20%20%20title%3A%20%22In%20%2B%20Bounce%22%2C%0A%20%20%20%20%20%20%20%20easing%3A%20Easing.in(Easing.bounce)%0A%20%20%20%20%20%20%7D%2C%0A%20%20%20%20%20%20%7B%0A%20%20%20%20%20%20%20%20title%3A%20%22Out%20%2B%20Exp%22%2C%0A%20%20%20%20%20%20%20%20easing%3A%20Easing.out(Easing.exp)%0A%20%20%20%20%20%20%7D%2C%0A%20%20%20%20%20%20%7B%0A%20%20%20%20%20%20%20%20title%3A%20%22InOut%20%2B%20Elastic%22%2C%0A%20%20%20%20%20%20%20%20easing%3A%20Easing.inOut(Easing.elastic(1))%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%5D%0A%20%20%7D%0A%5D%3B%0A%0Aconst%20styles%20%3D%20StyleSheet.create(%7B%0A%20%20container%3A%20%7B%0A%20%20%20%20flex%3A%201%2C%0A%20%20%20%20backgroundColor%3A%20%22%2320232a%22%0A%20%20%7D%2C%0A%20%20title%3A%20%7B%0A%20%20%20%20marginTop%3A%2010%2C%0A%20%20%20%20textAlign%3A%20%22center%22%2C%0A%20%20%20%20color%3A%20%22%2361dafb%22%0A%20%20%7D%2C%0A%20%20boxContainer%3A%20%7B%0A%20%20%20%20height%3A%20160%2C%0A%20%20%20%20alignItem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data-snack-platform="web"
data-snack-supported-platforms=ios,android,web
data-snack-preview="true"
style="
overflow: hidden;
background: #fafafa;
border: 1px solid rgba(0,0,0,.16);
border-radius: 4px;
height: 514px;
width: 100%;
"
></div></div></div><hr>
<h1><a class="anchor" aria-hidden="true" id="reference"></a><a href="#reference" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Reference</h1>
<h2><a class="anchor" aria-hidden="true" id="methods"></a><a href="#methods" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Methods</h2>
<h3><a class="anchor" aria-hidden="true" id="step0"></a><a href="#step0" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>step0()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">step0</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span>
</code></pre>
<p>A stepping function, returns 1 for any positive value of <code>n</code>.</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="step1"></a><a href="#step1" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>step1()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">step1</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span>
</code></pre>
<p>A stepping function, returns 1 if <code>n</code> is greater than or equal to 1.</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="linear"></a><a href="#linear" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>linear()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">linear</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A linear function, <code>f(t) = t</code>. Position correlates to elapsed time one to one.</p>
<p><a href="http://cubic-bezier.com/#0,0,1,1">http://cubic-bezier.com/#0,0,1,1</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="ease"></a><a href="#ease" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>ease()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">ease</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A basic inertial interaction, similar to an object slowly accelerating to speed.</p>
<p><a href="http://cubic-bezier.com/#.42,0,1,1">http://cubic-bezier.com/#.42,0,1,1</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="quad"></a><a href="#quad" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>quad()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">quad</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A quadratic function, <code>f(t) = t * t</code>. Position equals the square of elapsed time.</p>
<p><a href="http://easings.net/#easeInQuad">http://easings.net/#easeInQuad</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="cubic"></a><a href="#cubic" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>cubic()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">cubic</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A cubic function, <code>f(t) = t * t * t</code>. Position equals the cube of elapsed time.</p>
<p><a href="http://easings.net/#easeInCubic">http://easings.net/#easeInCubic</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="poly"></a><a href="#poly" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>poly()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">poly</span><span class="token punctuation">(</span>n<span class="token punctuation">)</span>
</code></pre>
<p>A power function. Position is equal to the Nth power of elapsed time.</p>
<p>n = 4: <a href="http://easings.net/#easeInQuart">http://easings.net/#easeInQuart</a> n = 5: <a href="http://easings.net/#easeInQuint">http://easings.net/#easeInQuint</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="sin"></a><a href="#sin" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>sin()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">sin</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A sinusoidal function.</p>
<p><a href="http://easings.net/#easeInSine">http://easings.net/#easeInSine</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="circle"></a><a href="#circle" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>circle()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">circle</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>A circular function.</p>
<p><a href="http://easings.net/#easeInCirc">http://easings.net/#easeInCirc</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="exp"></a><a href="#exp" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>exp()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">exp</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>An exponential function.</p>
<p><a href="http://easings.net/#easeInExpo">http://easings.net/#easeInExpo</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="elastic"></a><a href="#elastic" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>elastic()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">elastic</span><span class="token punctuation">(</span>bounciness<span class="token punctuation">)</span>
</code></pre>
<p>A basic elastic interaction, similar to a spring oscillating back and forth.</p>
<p>Default bounciness is 1, which overshoots a little bit once. 0 bounciness doesn't overshoot at all, and bounciness of N &gt; 1 will overshoot about N times.</p>
<p><a href="http://easings.net/#easeInElastic">http://easings.net/#easeInElastic</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="back"></a><a href="#back" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>back()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">back</span><span class="token punctuation">(</span>s<span class="token punctuation">)</span>
</code></pre>
<p>Use with <code>Animated.parallel()</code> to create a basic effect where the object animates back slightly as the animation starts.</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="bounce"></a><a href="#bounce" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>bounce()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">bounce</span><span class="token punctuation">(</span>t<span class="token punctuation">)</span>
</code></pre>
<p>Provides a basic bouncing effect.</p>
<p><a href="http://easings.net/#easeInBounce">http://easings.net/#easeInBounce</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="bezier"></a><a href="#bezier" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>bezier()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">bezier</span><span class="token punctuation">(</span>x1<span class="token punctuation">,</span> y1<span class="token punctuation">,</span> x2<span class="token punctuation">,</span> y2<span class="token punctuation">)</span>
</code></pre>
<p>Provides a cubic bezier curve, equivalent to CSS Transitions' <code>transition-timing-function</code>.</p>
<p>A useful tool to visualize cubic bezier curves can be found at <a href="http://cubic-bezier.com/">http://cubic-bezier.com/</a></p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="in"></a><a href="#in" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>in()</code></h3>
<!-- prettier-ignore-start -->
```jsx
static in(easing);
```
<!-- prettier-ignore-end -->
<p>Runs an easing function forwards.</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="out"></a><a href="#out" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>out()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">out</span><span class="token punctuation">(</span>easing<span class="token punctuation">)</span>
</code></pre>
<p>Runs an easing function backwards.</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="inout"></a><a href="#inout" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>inOut()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">inOut</span><span class="token punctuation">(</span>easing<span class="token punctuation">)</span>
</code></pre>
<p>Makes any easing function symmetrical. The easing function will run forwards for half of the duration, then backwards for the rest of the duration.</p>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/dimensions"><span class="arrow-prev">← </span><span>Dimensions</span></a><a class="docs-next button" href="/docs/interactionmanager"><span class="function-name-prevnext">InteractionManager</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#example">Example</a></li><li><a href="#methods">Methods</a><ul class="toc-headings"><li><a href="#step0"><code>step0()</code></a></li><li><a href="#step1"><code>step1()</code></a></li><li><a href="#linear"><code>linear()</code></a></li><li><a href="#ease"><code>ease()</code></a></li><li><a href="#quad"><code>quad()</code></a></li><li><a href="#cubic"><code>cubic()</code></a></li><li><a href="#poly"><code>poly()</code></a></li><li><a href="#sin"><code>sin()</code></a></li><li><a href="#circle"><code>circle()</code></a></li><li><a href="#exp"><code>exp()</code></a></li><li><a href="#elastic"><code>elastic()</code></a></li><li><a href="#back"><code>back()</code></a></li><li><a href="#bounce"><code>bounce()</code></a></li><li><a href="#bezier"><code>bezier()</code></a></li><li><a href="#in"><code>in()</code></a></li><li><a href="#out"><code>out()</code></a></li><li><a href="#inout"><code>inOut()</code></a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><div><h5>Docs</h5><a href="/docs/getting-started">Getting Started</a><a href="/docs/tutorial">Tutorial</a><a href="/docs/components-and-apis">Components and APIs</a><a href="/docs/more-resources">More Resources</a></div><div><h5>Community</h5><a href="/help">The React Native Community</a><a href="/showcase">Who&#x27;s using React Native?</a><a href="https://stackoverflow.com/questions/tagged/react-native" target="_blank">Ask Questions on Stack Overflow</a><a href="https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md">Contributor Guide</a><a href="https://dev.to/t/reactnative" target="_blank">DEV Community</a></div><div><h5>More Resources</h5><a href="/blog">Blog</a><a href="https://twitter.com/reactnative" target="_blank">Twitter</a><a href="https://github.com/facebook/react-native" target="_blank">GitHub</a><a href="https://reactjs.org" target="_blank">React</a></div></section><a href="https://code.facebook.com/projects/" target="_blank" class="fbOpenSource"><img src="/img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"/></a><section class="copyright">Copyright © 2020 Facebook Inc.</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>window.fbAsyncInit = function() {FB.init({appId:'1677033832619985',xfbml:true,version:'v2.7'});};(function(d, s, id){var js, fjs = d.getElementsByTagName(s)[0];if (d.getElementById(id)) {return;}js = d.createElement(s); js.id = id;js.src = '//connect.facebook.net/en_US/sdk.js';fjs.parentNode.insertBefore(js, fjs);}(document, 'script','facebook-jssdk'));
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