Monitor your React Native application

Our New Relic React Native agent monitors your React Native mobile app and provides deep insights into your app's performance, errors, and user experience. Written in JavaScript, the React Native agent includes all New Relic mobile monitoring features we offer for native mobile apps. Once you install and configure the React Native agent, you'll be able to:

Capture JavaScript errors Identify and fix problems quickly.
Track network requests: See how your app interacts with the backend.
Use distributed tracing: Drill down into handled exceptions and find the root cause.
Create custom events and metrics: Understand how your users interact with your app.

one.newrelic.com > All capabilities > Mobile > (select an app) > Summary: The React Native agent sends data to New Relic, where you can analyze crash data, network traffic, and other info on your hybrid app.

The agent allows your team to understand the health of your hybrid app regardless of the platform. We empower your team to make more informed development choices by providing insight into Javascript errors, distributed tracing, network instrumentation, and more.

Compatibility Requirements

Before you install the React Native agent, ensure your app meets these requirements:

Native support levels are based on React Native requirements.

If you haven't already, create your free New Relic account below to start monitoring your data today.

Install the agent

To install the React Native agent, follow our guided install, located directly in the UI.

If you need to install the agent manually, follow these steps:

Step 1 of 7

Add the React Native agent

Run the following:

bash

$npm i newrelic-react-native-agent

Step 2 of 7

Configure your application

Open your index.js and add the following code to launch New Relic:

import NewRelic from 'newrelic-react-native-agent';
import {name, version} from './package.json';
import {Platform} from 'react-native';
    let appToken;
    if (Platform.OS === 'ios') {
        appToken = '<IOS-APP-TOKEN>';
    } else {
        appToken = '<ANDROID-APP-TOKEN>';
    }
 const agentConfiguration = {
    
    //Android Specific
    // Optional:Enable or disable collection of event data.
    analyticsEventEnabled: true,
    // Optional:Enable or disable crash reporting.
    crashReportingEnabled: true,
    // Optional:Enable or disable interaction tracing. Trace instrumentation still occurs, but no traces are harvested. This will disable default and custom interactions.
    interactionTracingEnabled: true,
    // Optional:Enable or disable reporting successful HTTP requests to the MobileRequest event type.
    networkRequestEnabled: true,
    // Optional:Enable or disable reporting network and HTTP request errors to the MobileRequestError event type.
    networkErrorRequestEnabled: true,
    // Optional:Enable or disable capture of HTTP response bodies for HTTP error traces, and MobileRequestError events.
    httpRequestBodyCaptureEnabled: true,
   // Optional:Enable or disable agent logging.
    loggingEnabled: true,
    // Optional:Specifies the log level. Omit this field for the default log level.
    // Options include: ERROR (least verbose), WARNING, INFO, VERBOSE, AUDIT (most verbose).
    logLevel: NewRelic.LogLevel.INFO,
    // iOS Specific
    // Optional:Enable/Disable automatic instrumentation of WebViews
    webViewInstrumentation: true,
    // Optional:Set a specific collector address for sending data. Omit this field for default address.
    // collectorAddress: "",
    // Optional:Set a specific crash collector address for sending crashes. Omit this field for default address.
    // crashCollectorAddress: "",
    // Optional:Enable or disable reporting data using different endpoints for US government clients
    // fedRampEnabled: false
  };
NewRelic.startAgent(appToken,agentConfiguration);
NewRelic.setJSAppVersion(version);
AppRegistry.registerComponent(name, () => App);

Important

Please be sure to enter your proper application tokens. appToken is platform-specific. You will need to generate a separate token for Android and iOS apps.

Step 3 of 7

(Android-native apps only) Install the Android agent

Install the New Relic native Android agent.

Update build.gradle:

...
  repositories {
    ...
    mavenCentral()
  }
  dependencies {
    ...
    classpath "com.newrelic.agent.android:agent-gradle-plugin:7.1.0"
  }

Update app/build.gradle:

apply plugin: "com.android.application"
apply plugin: 'newrelic' // <-- add this

Make sure your app requests INTERNET and ACCESS_NETWORK_STATE permissions by adding these lines to your AndroidManifest.xml:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Step 4 of 7

(iOS-native apps only) Install the iOS agent

To ensure that the React Native agent is compatible with all iOS frameworks, install the New Relic iOS agent:

bash

$npx pod-install

Step 5 of 7

Configure autolinking and rebuilding

The React Native New Relic library must be linked to your project and your application needs to be rebuilt. If you use React Native 0.60+, you automatically have access to autolinking, requiring no further manual installation steps.

For Android:

bash

$npx react-native run-android

For iOS:

bash

$cd ios/
$pod install --repo-update
$cd ..
$npx react-native run-ios

In order to make sure that the React Native application functioning properly, you can run following commands, and fatal JS errors will show up as a crash in the New Relic UI.

For Android:

bash

$npx react-native run-android --variant=release

For iOS:

bash

$npx react-native run-ios --configuration Release

Step 6 of 7

(Optional) Integrate with Expo

After installing the React Native agent, integration with Expo is automatic with bare workflow but requires some extra steps for custom managed workflow via config plugins.

To set up custom managed workflow, after installing our package, add the config plugin to the plugins array of your app.json or app.config.js.

{
      "name": "my app",
      "plugins": ["newrelic-react-native-agent"]
    }

For the managed work flow, use the expo prebuild --clean command as described in the Adding custom native code guide to rebuild your app with the plugin changes. If this command is not running, you'll get errors when starting the New Relic agent. For Expo Go users, the agent will require using native code. Since Expo Go does not support sending custom native code over-the-air, you can follow Expo's documentation on how to use custom native code in Expo Go.

Step 7 of 7

To instrument routing and navigation for your React Native apps:

For react-navigation v5:
Set the onStateChange to NewRelic.onStateChange in your NavigationContainer as follows:
```
<NavigationContainer
onStateChange={  NewRelic.onStateChange  }  />
```
For react-navigation v4 and below: Set the onNavigationStateChange to NewRelic.onNavigationStateChange in your App wrapper as follows:
```
export  default () => (
<App
onNavigationStateChange={ NewRelic.onNavigationStateChange  }  />
);
```

For react-native-navigation, you can either:

Navigation.events().registerComponentDidAppearListener( NewRelic.componentDidAppearListener );

Or, you can report your screen changes manually using the following API:

var params = {
    'screenName':'screenName'
  };
  
  NewRelic.recordBreadcrumb('navigation',params);

Customize the agent instrumentation

Need to customize your agent instrumentation? Our public mobile SDK API methods let you collect custom data, configure default settings, and more.

The following customizations are available for the React Native agent.

If you want to...	Use this method
Record breadcrumbs to track app activity that may be helpful for troubleshooting crashes.	Record breadcrumbs
Track a method as an interaction.	Start interactions Stop interactions
Record custom metrics.	Record custom metrics
Record custom errors.	Record custom errors
Record custom attributes and events.	There are several ways to report custom attributes and events: Record custom attributes Increment session attribute count Remove an attribute Remove all attributes Record custom events Set the maximum size of an event pool Set maximum time the agent stores events in memory Get a current session's ID Set a custom user ID to associate with events and attributes For more about which would be the best method to use and why, see Add custom data.
Track custom network requests and failures.	Track HTTP requests Track failing HTTP requests
Shut down the agent.	Shut down the agent.
Enable/disable default mobile monitoring settings.	Enable/disable monitoring features
Run a test crash report.	Test crash reporting

Troubleshoot JavaScript errors

JavaScript errors and promise rejections can be seen in the Handled Exceptions tab in New Relic One. You will be able to see the event trail, attributes, and stack trace for each JavaScript error recorded.

You can also find these errors by running this query:

SELECT * FROM MobileHandledException SINCE 24 hours ago

The React Native agent creates custom events for JavaScript errors and reports them to New Relic. In the UI, you can track these JavaScript error events with a custom dashboard.

To create a custom dashboard:

Go to one.newrelic.com.
Click Query your data.
Run this query:
```
SELECT * FROM `JS Errors`
```
Click Add to dashboard.
one.newrelic.com > Query your data: Use the Query builder to create a custom dashboard for tracking JavaScript errors from your React app.
If you need help getting started with dashboards, see Introduction to dashboards.

JavaScript console logs

To view JavaScript console logs in New Relic, go to one.newrelic.com > Query your data and add this query to find those JavaScript console logs:

SELECT * FROM consoleEvents SINCE 24 HOURS AGO

Compatibility Requirements

Install the agent

Add the React Native agent

Configure your application

Important

(Android-native apps only) Install the Android agent

(iOS-native apps only) Install the iOS agent

Configure autolinking and rebuilding

(Optional) Integrate with Expo

(Optional) Configure instrument routing and navigation

React Navigation

React Native Navigation

Customize the agent instrumentation

Troubleshoot JavaScript errors

React Native Agent v1.2.0 and higher

React Native Agent v1.1.0 and lower

JavaScript console logs