---
title: "Feature Flags"
description: "With Feature Flags, Sentry tracks feature flag evaluations in your application, keeps an audit log of feature flag changes, and reports any suspicious updates that may have caused an error."
url: https://docs.sentry.io/platforms/javascript/guides/react-router/feature-flags/
---

# Set Up Feature Flags | Sentry for React Router Framework

## [Prerequisites](https://docs.sentry.io/platforms/javascript/guides/react-router/feature-flags.md#prerequisites)

* You have the [JavaScript SDK installed](https://docs.sentry.io/platforms/javascript/guides/react-router.md).

## [Enable Evaluation Tracking](https://docs.sentry.io/platforms/javascript/guides/react-router/feature-flags.md#enable-evaluation-tracking)

If you use a third-party SDK to evaluate feature flags, you can enable a Sentry SDK integration to track those evaluations. Integrations are provider specific. Documentation for supported SDKs is listed below.

* [LaunchDarkly](https://docs.sentry.io/platforms/javascript/guides/react-router/configuration/integrations/launchdarkly.md)
* [OpenFeature](https://docs.sentry.io/platforms/javascript/guides/react-router/configuration/integrations/openfeature.md) (multiple providers supported)
* [Statsig](https://docs.sentry.io/platforms/javascript/guides/react-router/configuration/integrations/statsig.md)
* [Unleash](https://docs.sentry.io/platforms/javascript/guides/react-router/configuration/integrations/unleash.md)

### [Generic Integration](https://docs.sentry.io/platforms/javascript/guides/react-router/feature-flags.md#generic-integration)

The generic `featureFlagsIntegration` allows you to manually track feature flag evaluations. Read the [documentation](https://docs.sentry.io/platforms/javascript/guides/react-router/configuration/integrations/featureflags.md) to learn more.

## [Enable Change Tracking](https://docs.sentry.io/platforms/javascript/guides/react-router/feature-flags.md#enable-change-tracking)

Change tracking requires registering a Sentry webhook with a feature flag provider. For set up instructions, visit the documentation for your provider:

* [Flagsmith](https://docs.sentry.io/organization/integrations/feature-flag/flagsmith.md#change-tracking)
* [LaunchDarkly](https://docs.sentry.io/organization/integrations/feature-flag/launchdarkly.md#change-tracking)
* [Statsig](https://docs.sentry.io/organization/integrations/feature-flag/statsig.md#change-tracking)
* [Unleash](https://docs.sentry.io/organization/integrations/feature-flag/unleash.md#change-tracking)
* [Generic](https://docs.sentry.io/organization/integrations/feature-flag/generic.md#change-tracking)