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Evaluating Feature Gates in the Statsig SDK

statsig.com · 1,242 words · saved by 1 readers

Background: This post assumes some prior knowledge of Statsig Feature Gates (Feature flags). You can read more in our article: What are Feature Flags? To evaluate Feature Gates on your servers or in your clients, Statsig provides SDKs in a number of different languages. Let’s explore how they work. Statsig SDKs target two different types of environments: Single-user/client-side environments (check Feature Gate values and experiments for the current user) Multi-user/server-side environments (check Feature Gate values and experiments for the user associated with the current request) All SDKs expose a similar API: initialize() — setup the SDK checkGate() — gets the value of a Feature Gate for the user. The gate may be open to everyone, or in a partial rollout state where only certain users pass the gate, based on some predefined criteria or random assignment getConfig() — gets the json blob of data we call a Dynamic Config for the user logEvent() —send log data to Statsig, which is used t

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