Feature SDK implementation

JavaScript v6+

The current universal JavaScript SDK using user contexts, decide, and trackEvent.

Browser or Node.js

Live decision runner

Simulation mode

No credential is stored in this repo. Simulation is deterministic and clearly labeled. Add an environment SDK key to send real decisions and events; it stays in this browser’s local storage.

Environment SDK key

Visitor ID

Audience attribute · plan

Flag key

Conversion event key

Implementation

Official docs ↗

npm install @optimizely/optimizely-sdk

import { createInstance } from '@optimizely/optimizely-sdk';

const client = createInstance({
  projectConfigManager: createPollingProjectConfigManager({ sdkKey }),
  eventProcessor: createBatchEventProcessor(),
});
await client.onReady();
const user = client.createUserContext('visitor-123', { plan: 'pro' });
const decision = await user.decideAsync('demo_flag');
user.trackEvent('demo_purchase', { revenue: 9900 });