Read a Statsig experiment in the Node.js server-core SDK and get the user's assigned group and parameter values

Documented steps

1. Install the Server Core Node SDK: npm i @statsig/statsig-node-core (distinct from the legacy `statsig-node` package).
2. Import: import { Statsig, StatsigUser } from '@statsig/statsig-node-core';
3. Create and initialize the client with a server Secret Key from the console API Keys tab: const statsig = new Statsig("secret-key"); await statsig.initialize();
4. Only call evaluation methods after the initialize() promise resolves; after that virtually all SDK calls are synchronous.
5. Build the user object: const user = new StatsigUser({ userID: "a-user" }); add email/custom/customIDs as needed for targeting.
6. Fetch the experiment: const experiment = statsig.getExperiment(user, "pricing_experiment"); - returns a DynamicConfig-shaped object.
7. Read the assigned group/bucket if needed: const groupName = experiment.group_name;
8. Read individual parameters (preferred over branching on group_name): const price = experiment.getValue("price", 9.99);
9. Note that calling getExperiment/getValue automatically fires an exposure event unless you pass { disableExposureLogging: true } to the call.
10. For mutually-exclusive multi-experiment setups, use statsig.getLayer(user, "layer_name") and layer.getValue(...) instead of a single experiment.
11. Before the process exits, flush queued exposure/events: await statsig.shutdown();
12. Reference: https://docs.statsig.com/server-core/node-core