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Update first-device-level-experiment.mdx #3411

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Update first-device-level-experiment.mdx
mnmcho Aug 27, 2025
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xhuang-statsig Sep 4, 2025
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6 changes: 3 additions & 3 deletions docs/guides/first-device-level-experiment.mdx
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Expand Up @@ -45,10 +45,10 @@ You can implement a device-level experiment almost exactly like a traditional us
After setting up your experiment in the Statsig console, the next step is to integrate it into your client application using one of Statsig’s SDKs.

**Important:**
- **`userID`** should **only** should only be set for authenticated, logged-in users.
- For logged-out or anonymous users, use **`stableID`** (Statsig’s auto-generated device ID) or your own custom deviceID to identify the device. See [customID types](/guides/experiment-on-custom-id-types) if you have your own deviceID
- **`userID`** should **only** be set for authenticated, logged-in users.
- For logged-out or anonymous users, use **`stableID`** (Statsig’s auto-generated device ID) or your own custom deviceID to identify the device. See [customID types](/guides/experiment-on-custom-id-types) if you have your own deviceID.
- Always pass all known IDs to the SDK — Statsig will use the correct one for evaluation depending on the experiment or gate’s ID type.
- If you do rely on stableID, it is only generated by Statsig client sdks (javascript, react, mobile, etc) - server sdks are unable to generate this ID for you
- If you do rely on stableID, it is only generated by Statsig client SDKs (javascript, react, mobile, etc) - server SDKs are unable to generate this ID for you.
- **User attributes**: You can pass additional attributes like `appVersion`, and `custom` properties for experiment targeting.

#### Example (JavaScript):
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