@flaggr/react-native

Crash and error reporting for React Native and Expo apps. Crashes show up on Flaggr's Issues page with the feature-flag variants they happened under. The Releases view shows each release's crash-free session rate.

npm install @flaggr/react-native @react-native-async-storage/async-storage

import AsyncStorage from "@react-native-async-storage/async-storage";
import { flaggrReactNative } from "@flaggr/react-native";

export const errors = flaggrReactNative({
  siteId: "site_…",                 // the app's Site in Flaggr
  release: "[email protected]+45",
  environment: __DEV__ ? "development" : "production",
  storage: AsyncStorage,            // keeps a fatal crash for the next launch
});
errors.install();

// With @flaggr/sdk the reporter is also a plugin, so crashes carry the evaluated variants:
// createFlaggr({ serviceId: "mobile-app", apiKey: "fgr_…", plugins: [errors] })

errors.captureException(error, { tags: { screen: "Checkout" } });
errors.trackScreen("Checkout"); // e.g. from React Navigation's onStateChange

What it does:

• Catches JavaScript crashes and errors (React Native's global handler) and unhandled promise rejections.
• Records breadcrumbs for flag evaluations, console warnings, fetches, app state changes and screens.
• Reports each launch as a session, for crash-free rates.
• Doesn't catch native crashes (Objective-C, Swift, Java, Kotlin or C++).

See React Native and Expo.

MIT licensed.