# Statsig | Sentry for Hono

##### Currently in Beta

Feature flag change tracking and feature flag evaluation tracking is currently in open beta.

This integration only works inside a browser environment. It is only available from a package-based install (e.g. `npm` or `yarn`).

The [Statsig](https://www.statsig.com/.md) integration tracks feature flag evaluations produced by the Statsig JavaScript Client SDK. These evaluations are held in memory, and in the event an error occurs, sent to Sentry for review and analysis. **At the moment, we only support boolean flag evaluations from Statsig's `checkGate` method**. Learn more about [Statsig feature gates](https://docs.statsig.com/feature-flags/working-with.md).

This integration is available in Sentry SDK **versions 9.0.0 and higher**, or **versions 8.55.0 and higher for v8.**

*Import name: `Sentry.statsigIntegration`*

Before using this integration, you need to install and instrument Statsig in your app. Learn more by reading [Statsig's SDK reference](https://docs.statsig.com/client/javascript-sdk.md) and [quickstart guide](https://docs.statsig.com/guides/first-feature.md).

```javascript
import * as Sentry from "@sentry/browser";
import { StatsigClient } from "@statsig/js-client";

const statsigClient = new StatsigClient(
  YOUR_SDK_KEY,
  { userID: "my-user-id" },
  {},
); // see Statsig SDK reference.

Sentry.init({
  dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",
  integrations: [
    Sentry.statsigIntegration({ featureFlagClient: statsigClient }),
  ],
});

await statsigClient.initializeAsync(); // or statsigClient.initializeSync();

const result = statsigClient.checkGate("my-feature-gate");
Sentry.captureException(new Error("something went wrong"));
```

Visit the Sentry website and confirm that your error event has recorded the feature flag "my-feature-gate" and its value "false".

##### Next Steps

* **Track feature flag evaluations in other parts of your codebase.** If needed, you can set up evaluation tracking for more than one SDK. [Read the docs](https://docs.sentry.io/platforms/javascript/feature-flags.md#enable-evaluation-tracking) to learn more.
* **Set up your change tracking webhook.** In order to take full advantage of the feature flag capabilities Sentry offers there is an additional setup step needed. Your feature flag provider needs to notify Sentry when a feature flag definition has changed. A Sentry webhook URL can be registered with your provider. Learn [how](https://docs.sentry.io/platforms/javascript/feature-flags.md#enable-change-tracking).
