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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>AppRegistry · React Native</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="<div class="banner-native-code-required">"/><meta name="docsearch:version" content="0.62"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="AppRegistry · React Native"/><meta property="og:type" content="website"/><meta property="og:url" content="https://reactnative.dev/"/><meta property="og:description" content="<div class="banner-native-code-required">"/><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/appregistry.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">AppRegistry</h1></header><article><div><span><div class="banner-native-code-required">
<h3>Project with Native Code Required</h3>
<p>
If you are using the managed <code>expo-cli</code> workflow there is only ever one entry component registered with <code>AppRegistry</code> and it is handled automatically, you do not need to use this API.
</p>
</div>
<p><code>AppRegistry</code> is the JS entry point to running all React Native apps. App root components should register themselves with <code>AppRegistry.registerComponent</code>, then the native system can load the bundle for the app and then actually run the app when it's ready by invoking <code>AppRegistry.runApplication</code>.</p>
<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span> Text<span class="token punctuation">,</span> AppRegistry <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> <span class="token function-variable function">App</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token parameter">props</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">View</span></span><span class="token punctuation">></span></span><span class="token plain-text">
</span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Text</span></span><span class="token punctuation">></span></span><span class="token plain-text">App1</span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span><span class="token class-name">Text</span></span><span class="token punctuation">></span></span><span class="token plain-text">
</span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span><span class="token class-name">View</span></span><span class="token punctuation">></span></span>
<span class="token punctuation">)</span><span class="token punctuation">;</span>
AppRegistry<span class="token punctuation">.</span><span class="token function">registerComponent</span><span class="token punctuation">(</span><span class="token string">'Appname'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> App<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<p>To "stop" an application when a view should be destroyed, call <code>AppRegistry.unmountApplicationComponentAtRootTag</code> with the tag that was passed into <code>runApplication</code>. These should always be used as a pair.</p>
<p><code>AppRegistry</code> should be required early in the <code>require</code> sequence to make sure the JS execution environment is setup before other modules are required.</p>
<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="setwrappercomponentprovider"></a><a href="#setwrappercomponentprovider" 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>setWrapperComponentProvider()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">setWrapperComponentProvider</span><span class="token punctuation">(</span>provider<span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>provider</td><td>ComponentProvider</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="enablearchitectureindicator"></a><a href="#enablearchitectureindicator" 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>enableArchitectureIndicator()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">enableArchitectureIndicator</span><span class="token punctuation">(</span>enabled<span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>enabled</td><td>boolean</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registerconfig"></a><a href="#registerconfig" 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>registerConfig()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerConfig</span><span class="token punctuation">(</span><span class="token punctuation">[</span>config<span class="token punctuation">]</span><span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th><th>Description</th></tr>
</thead>
<tbody>
<tr><td>config</td><td>AppConfig</td><td>yes</td><td>See below.</td></tr>
</tbody>
</table>
<p>Valid <code>AppConfig</code> keys are:</p>
<ul>
<li>'appKey' (string)- Required.</li>
<li>'component' (ComponentProvider) - Optional.</li>
<li>'run' (Function) - Optional.</li>
<li>'section' (boolean) - Optional.</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registercomponent"></a><a href="#registercomponent" 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>registerComponent()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerComponent</span><span class="token punctuation">(</span>appKey<span class="token punctuation">,</span> componentProvider<span class="token punctuation">,</span> section<span class="token operator">?</span><span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>appKey</td><td>string</td><td>yes</td></tr>
<tr><td>componentProvider</td><td>ComponentProvider</td><td>yes</td></tr>
<tr><td>section</td><td>boolean</td><td>no</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registerrunnable"></a><a href="#registerrunnable" 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>registerRunnable()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerRunnable</span><span class="token punctuation">(</span>appKey<span class="token punctuation">,</span> run<span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>appKey</td><td>string</td><td>yes</td></tr>
<tr><td>run</td><td>Function</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registersection"></a><a href="#registersection" 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>registerSection()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerSection</span><span class="token punctuation">(</span>appKey<span class="token punctuation">,</span> component<span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>appKey</td><td>string</td><td>yes</td></tr>
<tr><td>component</td><td>ComponentProvider</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="getappkeys"></a><a href="#getappkeys" 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>getAppKeys()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">getAppKeys</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>Returns an Array of AppKeys</p>
<h3><a class="anchor" aria-hidden="true" id="getsectionkeys"></a><a href="#getsectionkeys" 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>getSectionKeys()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">getSectionKeys</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>Returns an Array of SectionKeys</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="getsections"></a><a href="#getsections" 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>getSections()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">getSections</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>Returns all Runnables which is an object with key of <code>AppKeys</code> and value of type of <code>Runnable</code> which consist of:</p>
<ul>
<li>'component' (ComponentProvider).</li>
<li>'run' (Function).</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="getrunnable"></a><a href="#getrunnable" 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>getRunnable()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">getRunnable</span><span class="token punctuation">(</span>appKey<span class="token punctuation">)</span>
</code></pre>
<p>Returns a <code>Runnable</code> object which consist of:</p>
<ul>
<li>'component' (ComponentProvider).</li>
<li>'run' (Function).</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="getregistry"></a><a href="#getregistry" 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>getRegistry()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">getRegistry</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>Returns a type <code>Registry</code> which consist of:</p>
<ul>
<li>'sections' (Array of strings).</li>
<li>'runnables' (Runnables).</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="setcomponentproviderinstrumentationhook"></a><a href="#setcomponentproviderinstrumentationhook" 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>setComponentProviderInstrumentationHook()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">setComponentProviderInstrumentationHook</span><span class="token punctuation">(</span>hook<span class="token punctuation">)</span>
</code></pre>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th><th>Description</th></tr>
</thead>
<tbody>
<tr><td>hook</td><td>Function</td><td>yes</td><td>See below.</td></tr>
</tbody>
</table>
<p>A valid <code>hook</code> accepts the following as arguments:</p>
<ul>
<li>'component' (ComponentProvider)- Required.</li>
<li>'scopedPerformanceLogger' (IPerformanceLogger)- Required.</li>
</ul>
<p>The <code>hook</code> function returns a React Component</p>
<hr>
<h3><a class="anchor" aria-hidden="true" id="runapplication"></a><a href="#runapplication" 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>runApplication()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">runApplication</span><span class="token punctuation">(</span>appKey<span class="token punctuation">,</span> appParameters<span class="token punctuation">)</span>
</code></pre>
<p>Loads the JavaScript bundle and runs the app.</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>appKey</td><td>string</td><td>yes</td></tr>
<tr><td>appParameters</td><td>any</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="unmountapplicationcomponentatroottag"></a><a href="#unmountapplicationcomponentatroottag" 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>unmountApplicationComponentAtRootTag()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">unmountApplicationComponentAtRootTag</span><span class="token punctuation">(</span>rootTag<span class="token punctuation">)</span>
</code></pre>
<p>Stops an application when a view should be destroyed.</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>rootTag</td><td>number</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registerheadlesstask"></a><a href="#registerheadlesstask" 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>registerHeadlessTask()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerHeadlessTask</span><span class="token punctuation">(</span>taskKey<span class="token punctuation">,</span> taskProvider<span class="token punctuation">)</span>
</code></pre>
<p>Register a headless task. A headless task is a bit of code that runs without a UI. @param taskKey the key associated with this task @param taskProvider a promise returning function that takes some data passed from the native side as the only argument; when the promise is resolved or rejected the native side is notified of this event and it may decide to destroy the JS context.</p>
<p>This is a way to run tasks in JavaScript while your app is in the background. It can be used, for example, to sync fresh data, handle push notifications, or play music.</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th><th>Description</th></tr>
</thead>
<tbody>
<tr><td>taskKey</td><td>String</td><td>yes</td><td>See below.</td></tr>
<tr><td>taskProvider</td><td>TaskProvider</td><td>yes</td><td>See below.</td></tr>
</tbody>
</table>
<ul>
<li>A valid <code>TaskProvider</code> is a function that returns a <code>Task</code>.</li>
<li>A <code>Task</code> is a function that accepts any data as argument and returns a Promise that resolves to undefined.</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="registercancellableheadlesstask"></a><a href="#registercancellableheadlesstask" 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>registerCancellableHeadlessTask()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">registerCancellableHeadlessTask</span><span class="token punctuation">(</span>taskKey<span class="token punctuation">,</span> taskProvider<span class="token punctuation">,</span> taskCancelProvider<span class="token punctuation">)</span>
</code></pre>
<p>Register a headless task which can be cancelled. A headless task is a bit of code that runs without a UI. @param taskKey the key associated with this task @param taskProvider a promise returning function that takes some data passed from the native side as the only argument; when the promise is resolved or rejected the native side is notified of this event and it may decide to destroy the JS context. @param taskCancelProvider a void returning function that takes no arguments; when a cancellation is requested, the function being executed by taskProvider should wrap up and return ASAP.</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th><th>Description</th></tr>
</thead>
<tbody>
<tr><td>taskKey</td><td>String</td><td>yes</td><td>See below.</td></tr>
<tr><td>taskProvider</td><td>TaskProvider</td><td>yes</td><td>See below.</td></tr>
<tr><td>taskCancelProvider</td><td>TaskCancelProvider</td><td>yes</td><td>See below.</td></tr>
</tbody>
</table>
<ul>
<li>A valid <code>TaskProvider</code> is a function that returns a <code>Task</code>.</li>
<li>A <code>Task</code> is a function that accepts any data as argument and returns a Promise that resolves to undefined.</li>
<li>A valid <code>TaskCancelProvider</code> is a function that returns a <code>TaskCanceller</code>.</li>
<li>A <code>TaskCanceller</code> is a function that accepts no argument and returns void.</li>
</ul>
<hr>
<h3><a class="anchor" aria-hidden="true" id="startheadlesstask"></a><a href="#startheadlesstask" 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>startHeadlessTask()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">startHeadlessTask</span><span class="token punctuation">(</span>taskId<span class="token punctuation">,</span> taskKey<span class="token punctuation">,</span> data<span class="token punctuation">)</span>
</code></pre>
<p>Only called from native code. Starts a headless task.</p>
<p>@param taskId the native id for this task instance to keep track of its execution @param taskKey the key for the task to start @param data the data to pass to the task</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>taskId</td><td>number</td><td>yes</td></tr>
<tr><td>taskKey</td><td>string</td><td>yes</td></tr>
<tr><td>data</td><td>any</td><td>yes</td></tr>
</tbody>
</table>
<hr>
<h3><a class="anchor" aria-hidden="true" id="cancelheadlesstask"></a><a href="#cancelheadlesstask" 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>cancelHeadlessTask()</code></h3>
<pre><code class="hljs css language-jsx"><span class="token keyword">static</span> <span class="token function">cancelHeadlessTask</span><span class="token punctuation">(</span>taskId<span class="token punctuation">,</span> taskKey<span class="token punctuation">)</span>
</code></pre>
<p>Only called from native code. Cancels a headless task.</p>
<p>@param taskId the native id for this task instance that was used when startHeadlessTask was called @param taskKey the key for the task that was used when startHeadlessTask was called</p>
<p><strong>Parameters:</strong></p>
<table>
<thead>
<tr><th>Name</th><th>Type</th><th>Required</th></tr>
</thead>
<tbody>
<tr><td>taskId</td><td>number</td><td>yes</td></tr>
<tr><td>taskKey</td><td>string</td><td>yes</td></tr>
</tbody>
</table>
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