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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&#x27;s ready by invoking <code>AppRegistry.runApplication</code>.</p><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> Text</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> AppRegistry </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">from</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">&#x27;react-native&#x27;</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">App</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">props</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=&gt;</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain">  </span><span class="token tag punctuation" style="color:#657b83">&lt;</span><span class="token tag class-name" style="color:#fac863">View</span><span class="token tag punctuation" style="color:#657b83">&gt;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain">    </span><span class="token tag punctuation" style="color:#657b83">&lt;</span><span class="token tag class-name" style="color:#fac863">Text</span><span class="token tag punctuation" style="color:#657b83">&gt;</span><span class="token plain">App1</span><span class="token tag punctuation" style="color:#657b83">&lt;/</span><span class="token tag class-name" style="color:#fac863">Text</span><span class="token tag punctuation" style="color:#657b83">&gt;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain">  </span><span class="token tag punctuation" style="color:#657b83">&lt;/</span><span class="token tag class-name" style="color:#fac863">View</span><span class="token tag punctuation" style="color:#657b83">&gt;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain">AppRegistry</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">registerComponent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token string" style="color:#8dc891">&#x27;Appname&#x27;</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=&gt;</span><span class="token plain"> App</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>To &quot;stop&quot; 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 aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="reference"></a>Reference<a class="hash-link" href="#reference" title="Direct link to heading">#</a></h1><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="methods"></a>Methods<a class="hash-link" href="#methods" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="cancelheadlesstask"></a><code>cancelHeadlessTask()</code><a class="hash-link" href="#cancelheadlesstask" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">cancelHeadlessTask</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">taskId</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> taskKey</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Only called from native code. Cancels a headless task.</p><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>taskId <div class="label basic required">Required</div></td><td>number</td><td>The native id for this task instance that was used when <code>startHeadlessTask</code> was called.</td></tr><tr><td>taskKey <div class="label basic required">Required</div></td><td>string</td><td>The key for the task that was used when <code>startHeadlessTask</code> was called.</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="enablearchitectureindicator"></a><code>enableArchitectureIndicator()</code><a class="hash-link" href="#enablearchitectureindicator" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">enableArchitectureIndicator</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">enabled</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>enabled <div class="label basic required">Required</div></td><td>boolean</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="getappkeys"></a><code>getAppKeys()</code><a class="hash-link" href="#getappkeys" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getAppKeys</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Returns an array of strings.</p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="getregistry"></a><code>getRegistry()</code><a class="hash-link" href="#getregistry" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getRegistry</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Returns a <a href="/docs/next/appregistry#registry">Registry</a> object.</p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="getrunnable"></a><code>getRunnable()</code><a class="hash-link" href="#getrunnable" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getRunnable</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">appKey</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Returns a <a href="/docs/next/appregistry#runnable">Runnable</a> object.</p><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="getsectionkeys"></a><code>getSectionKeys()</code><a class="hash-link" href="#getsectionkeys" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getSectionKeys</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Returns an array of strings.</p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="getsections"></a><code>getSections()</code><a class="hash-link" href="#getsections" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getSections</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Returns a <a href="/docs/next/appregistry#runnables">Runnables</a> object.</p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registercancellableheadlesstask"></a><code>registerCancellableHeadlessTask()</code><a class="hash-link" href="#registercancellableheadlesstask" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerCancellableHeadlessTask</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">taskKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> taskProvider</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> taskCancelProvider</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Register a headless task which can be cancelled. A headless task is a bit of code that runs without a UI.</p><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>taskKey<br><div class="label basic required two-lines">Required</div></td><td>string</td><td>The native id for this task instance that was used when startHeadlessTask was called.</td></tr><tr><td>taskProvider<br><div class="label basic required two-lines">Required</div></td><td><a href="/docs/next/appregistry#taskprovider">TaskProvider</a></td><td>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.</td></tr><tr><td>taskCancelProvider<br><div class="label basic required two-lines">Required</div></td><td><a href="/docs/next/appregistry#taskcancelprovider">TaskCancelProvider</a></td><td>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.</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registercomponent"></a><code>registerComponent()</code><a class="hash-link" href="#registercomponent" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerComponent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">appKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> componentProvider</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> section</span><span class="token operator" style="color:#fc929e">?</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr><tr><td>componentProvider <div class="label basic required">Required</div></td><td>ComponentProvider</td></tr><tr><td>section</td><td>boolean</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registerconfig"></a><code>registerConfig()</code><a class="hash-link" href="#registerconfig" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerConfig</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">config</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>config <div class="label basic required">Required</div></td><td><a href="/docs/next/appregistry#appconfig">AppConfig</a></td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registerheadlesstask"></a><code>registerHeadlessTask()</code><a class="hash-link" href="#registerheadlesstask" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerHeadlessTask</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">taskKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> taskProvider</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Register a headless task. A headless task is a bit of code that runs without a UI.</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>Description</th></tr></thead><tbody><tr><td>taskKey <div class="label basic required two-lines">Required</div></td><td>string</td><td>The native id for this task instance that was used when startHeadlessTask was called.</td></tr><tr><td>taskProvider <div class="label basic required two-lines">Required</div></td><td><a href="/docs/next/appregistry#taskprovider">TaskProvider</a></td><td>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.</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registerrunnable"></a><code>registerRunnable()</code><a class="hash-link" href="#registerrunnable" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerRunnable</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">appKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> run</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr><tr><td>run <div class="label basic required">Required</div></td><td>function</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registersection"></a><code>registerSection()</code><a class="hash-link" href="#registersection" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">registerSection</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">appKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> component</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr><tr><td>component <div class="label basic required">Required</div></td><td>ComponentProvider</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="runapplication"></a><code>runApplication()</code><a class="hash-link" href="#runapplication" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">runApplication</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">appKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> appParameters</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Loads the JavaScript bundle and runs the app.</p><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr><tr><td>appParameters <div class="label basic required">Required</div></td><td>any</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="setcomponentproviderinstrumentationhook"></a><code>setComponentProviderInstrumentationHook()</code><a class="hash-link" href="#setcomponentproviderinstrumentationhook" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">setComponentProviderInstrumentationHook</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">hook</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>hook <div class="label basic required">Required</div></td><td>function</td></tr></tbody></table><p>A valid <code>hook</code> function accepts the following as arguments:</p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>component <div class="label basic required">Required</div></td><td>ComponentProvider</td></tr><tr><td>scopedPerformanceLogger <div class="label basic required">Required</div></td><td>IPerformanceLogger</td></tr></tbody></table><p>The function must also return a React Component.</p><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="setwrappercomponentprovider"></a><code>setWrapperComponentProvider()</code><a class="hash-link" href="#setwrappercomponentprovider" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">setWrapperComponentProvider</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">provider</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>provider <div class="label basic required">Required</div></td><td>ComponentProvider</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="startheadlesstask"></a><code>startHeadlessTask()</code><a class="hash-link" href="#startheadlesstask" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">startHeadlessTask</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">taskId</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> taskKey</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> data</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><p>Only called from native code. Starts a headless task.</p><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>taskId <div class="label basic required">Required</div></td><td>number</td><td>The native id for this task instance to keep track of its execution.</td></tr><tr><td>taskKey <div class="label basic required">Required</div></td><td>string</td><td>The key for the task to start.</td></tr><tr><td>data <div class="label basic required">Required</div></td><td>any</td><td>The data to pass to the task.</td></tr></tbody></table><hr><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="unmountapplicationcomponentatroottag"></a><code>unmountApplicationComponentAtRootTag()</code><a class="hash-link" href="#unmountapplicationcomponentatroottag" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_1daz"><div class="codeBlockContent_2es_"><div tabindex="0" class="prism-code language-jsx codeBlock_27aQ thin-scrollbar"><div class="codeBlockLines_2rCb" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">unmountApplicationComponentAtRootTag</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">rootTag</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div><button type="button" aria-label="Copy code to clipboard" class="copyButton_2bml">Copy</button></div></div><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></tr></thead><tbody><tr><td>rootTag <div class="label basic required">Required</div></td><td>number</td></tr></tbody></table><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="type-definitions"></a>Type Definitions<a class="hash-link" href="#type-definitions" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="appconfig"></a>AppConfig<a class="hash-link" href="#appconfig" title="Direct link to heading">#</a></h3><p>Application configuration for the <code>registerConfig</code> method.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>object</td></tr></tbody></table><p><strong>Properties:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>appKey <div class="label basic required">Required</div></td><td>string</td></tr><tr><td>component</td><td>ComponentProvider</td></tr><tr><td>run</td><td>function</td></tr><tr><td>section</td><td>boolean</td></tr></tbody></table><blockquote><p><strong>Note:</strong> Every config is expected to set either <code>component</code> or <code>run</code> function.</p></blockquote><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="registry"></a>Registry<a class="hash-link" href="#registry" title="Direct link to heading">#</a></h3><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>object</td></tr></tbody></table><p><strong>Properties:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>runnables</td><td>array of <a href="/docs/next/appregistry#runnable">Runnables</a></td></tr><tr><td>sections</td><td>array of strings</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="runnable"></a>Runnable<a class="hash-link" href="#runnable" title="Direct link to heading">#</a></h3><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>object</td></tr></tbody></table><p><strong>Properties:</strong></p><table><thead><tr><th>Name</th><th>Type</th></tr></thead><tbody><tr><td>component</td><td>ComponentProvider</td></tr><tr><td>run</td><td>function</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="runnables"></a>Runnables<a class="hash-link" href="#runnables" title="Direct link to heading">#</a></h3><p>An object with key of <code>appKey</code> and value of type of <a href="/docs/next/appregistry#runnable"><code>Runnable</code></a>.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>object</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="task"></a>Task<a class="hash-link" href="#task" title="Direct link to heading">#</a></h3><p>A <code>Task</code> is a function that accepts any data as argument and returns a Promise that resolves to <code>undefined</code>.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>function</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="taskcanceller"></a>TaskCanceller<a class="hash-link" href="#taskcanceller" title="Direct link to heading">#</a></h3><p>A <code>TaskCanceller</code> is a function that accepts no argument and returns void.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>function</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="taskcancelprovider"></a>TaskCancelProvider<a class="hash-link" href="#taskcancelprovider" title="Direct link to heading">#</a></h3><p>A valid <code>TaskCancelProvider</code> is a function that returns a <a href="/docs/next/appregistry#taskcanceller"><code>TaskCanceller</code></a>.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>function</td></tr></tbody></table><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_E4oP" id="taskprovider"></a>TaskProvider<a class="hash-link" href="#taskprovider" title="Direct link to heading">#</a></h3><p>A valid <code>TaskProvider</code> is a function that returns a <a href="/docs/next/appregistry#task"><code>Task</code></a>.</p><table><thead><tr><th>Type</th></tr></thead><tbody><tr><td>function</td></tr></tbody></table></div></article><div class="docMetadata margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/facebook/react-native-website/blob/master/website/../docs/appregistry.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" role="img" viewBox="0 0 40 40" class="iconEdit_2Hwv"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col text--right"><em><small class="docMetadata-updated">Last updated on <time datetime="2020-12-07T15:59:34.000Z" class="docLastUpdatedAt_1gIo">12/7/2020</time></small></em></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/docs/next/appearance"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">« Appearance</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/next/appstate"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">AppState »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_1zTD thin-scrollbar"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#methods" class="table-of-contents__link">Methods</a><ul><li><a href="#cancelheadlesstask" class="table-of-contents__link"><code>cancelHeadlessTask()</code></a></li><li><a href="#enablearchitectureindicator" class="table-of-contents__link"><code>enableArchitectureIndicator()</code></a></li><li><a href="#getappkeys" class="table-of-contents__link"><code>getAppKeys()</code></a></li><li><a href="#getregistry" class="table-of-contents__link"><code>getRegistry()</code></a></li><li><a href="#getrunnable" class="table-of-contents__link"><code>getRunnable()</code></a></li><li><a href="#getsectionkeys" class="table-of-contents__link"><code>getSectionKeys()</code></a></li><li><a href="#getsections" class="table-of-contents__link"><code>getSections()</code></a></li><li><a href="#registercancellableheadlesstask" class="table-of-contents__link"><code>registerCancellableHeadlessTask()</code></a></li><li><a href="#registercomponent" class="table-of-contents__link"><code>registerComponent()</code></a></li><li><a href="#registerconfig" class="table-of-contents__link"><code>registerConfig()</code></a></li><li><a href="#registerheadlesstask" class="table-of-contents__link"><code>registerHeadlessTask()</code></a></li><li><a href="#registerrunnable" class="table-of-contents__link"><code>registerRunnable()</code></a></li><li><a href="#registersection" class="table-of-contents__link"><code>registerSection()</code></a></li><li><a href="#runapplication" class="table-of-contents__link"><code>runApplication()</code></a></li><li><a href="#setcomponentproviderinstrumentationhook" class="table-of-contents__link"><code>setComponentProviderInstrumentationHook()</code></a></li><li><a href="#setwrappercomponentprovider" class="table-of-contents__link"><code>setWrapperComponentProvider()</code></a></li><li><a href="#startheadlesstask" class="table-of-contents__link"><code>startHeadlessTask()</code></a></li><li><a href="#unmountapplicationcomponentatroottag" class="table-of-contents__link"><code>unmountApplicationComponentAtRootTag()</code></a></li></ul></li><li><a href="#type-definitions" class="table-of-contents__link">Type Definitions</a><ul><li><a href="#appconfig" class="table-of-contents__link">AppConfig</a></li><li><a href="#registry" class="table-of-contents__link">Registry</a></li><li><a href="#runnable" class="table-of-contents__link">Runnable</a></li><li><a href="#runnables" class="table-of-contents__link">Runnables</a></li><li><a href="#task" class="table-of-contents__link">Task</a></li><li><a href="#taskcanceller" class="table-of-contents__link">TaskCanceller</a></li><li><a href="#taskcancelprovider" class="table-of-contents__link">TaskCancelProvider</a></li><li><a href="#taskprovider" class="table-of-contents__link">TaskProvider</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Docs</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/docs/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/tutorial">Tutorial</a></li><li class="footer__item"><a 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