react-native/docs/appregistry.md

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---
id: appregistry
title: AppRegistry
layout: docs
category: APIs
permalink: docs/appregistry.html
next: appstate
previous: animated
---
<div class="banner-crna-ejected">
<h3>Project with Native Code Required</h3>
<p>
This API only works in projects made with <code>react-native init</code>
or in those made with Create React Native App which have since ejected. For
more information about ejecting, please see
the <a href="https://github.com/react-community/create-react-native-app/blob/master/EJECTING.md" target="_blank">guide</a> on
the Create React Native App repository.
</p>
</div>
`AppRegistry` is the JS entry point to running all React Native apps. App
root components should register themselves with
`AppRegistry.registerComponent`, then the native system can load the bundle
for the app and then actually run the app when it's ready by invoking
`AppRegistry.runApplication`.
To "stop" an application when a view should be destroyed, call
`AppRegistry.unmountApplicationComponentAtRootTag` with the tag that was
passed into `runApplication`. These should always be used as a pair.
`AppRegistry` should be `require`d early in the `require` sequence to make
sure the JS execution environment is setup before other modules are
`require`d.
### Methods
- [`setWrapperComponentProvider`](docs/appregistry.html#setwrappercomponentprovider)
- [`registerConfig`](docs/appregistry.html#registerconfig)
- [`registerComponent`](docs/appregistry.html#registercomponent)
- [`registerRunnable`](docs/appregistry.html#registerrunnable)
- [`registerSection`](docs/appregistry.html#registersection)
- [`getAppKeys`](docs/appregistry.html#getappkeys)
- [`getSectionKeys`](docs/appregistry.html#getsectionkeys)
- [`getSections`](docs/appregistry.html#getsections)
- [`getRunnable`](docs/appregistry.html#getrunnable)
- [`getRegistry`](docs/appregistry.html#getregistry)
- [`setComponentProviderInstrumentationHook`](docs/appregistry.html#setcomponentproviderinstrumentationhook)
- [`runApplication`](docs/appregistry.html#runapplication)
- [`unmountApplicationComponentAtRootTag`](docs/appregistry.html#unmountapplicationcomponentatroottag)
- [`registerHeadlessTask`](docs/appregistry.html#registerheadlesstask)
- [`startHeadlessTask`](docs/appregistry.html#startheadlesstask)
---
# Reference
## Methods
### `setWrapperComponentProvider()`
```javascript
static setWrapperComponentProvider(provider)
```
---
### `registerConfig()`
```javascript
static registerConfig(config)
```
---
### `registerComponent()`
```javascript
static registerComponent(appKey, componentProvider, section?)
```
---
### `registerRunnable()`
```javascript
static registerRunnable(appKey, run)
```
---
### `registerSection()`
```javascript
static registerSection(appKey, component)
```
---
### `getAppKeys()`
```javascript
static getAppKeys()
```
---
### `getSectionKeys()`
```javascript
static getSectionKeys()
```
---
### `getSections()`
```javascript
static getSections()
```
---
### `getRunnable()`
```javascript
static getRunnable(appKey)
```
---
### `getRegistry()`
```javascript
static getRegistry()
```
---
### `setComponentProviderInstrumentationHook()`
```javascript
static setComponentProviderInstrumentationHook(hook)
```
---
### `runApplication()`
```javascript
static runApplication(appKey, appParameters)
```
---
### `unmountApplicationComponentAtRootTag()`
```javascript
static unmountApplicationComponentAtRootTag(rootTag)
```
---
### `registerHeadlessTask()`
```javascript
static registerHeadlessTask(taskKey, task)
```
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 task 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.
---
### `startHeadlessTask()`
```javascript
static startHeadlessTask(taskId, taskKey, data)
```
Only called from native code. Starts a headless task.
@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