tggl-client

import { TgglClient, TgglLocalClient, StaticStorage } from 'tggl-client'; async function runFeatureFlagExample() { // It's highly recommended to use environment variables for API keys in production const clientApiKey = process.env.TGGL_CLIENT_API_KEY ?? 'TGGL_CLIENT_KEY_XXX'; const serverApiKey = process.env.TGGL_SERVER_API_KEY ?? 'TGGL_SERVER_KEY_YYY'; // --- Client-side usage example (e.g., browser, React Native) --- console.log("\n--- Initializing TgglClient (Client-side) ---"); const client = new TgglClient({ apiKey: clientApiKey, initialContext: { userId: 'browser-user-123', plan: 'free' }, }); try { await client.waitReady(); // Wait for initial flags to be fetched if (client.get('enable-dark-mode', false)) { console.log('Client: Dark mode is ENABLED for this user!'); } else { console.log('Client: Dark mode is DISABLED or not found, using default.'); } const welcomeMessage = client.get('welcome-banner-text', 'Hello there!'); console.log(`Client: Welcome message: "${welcomeMessage}"`); } catch (error) { console.error("Error with TgglClient initialization or flag evaluation:", error); } // --- Server-side usage example (e.g., Node.js backend) --- console.log("\n--- Initializing TgglLocalClient (Server-side) ---"); // For production, consider PostgresStorage or RedisStorage with proper configuration const storage = new StaticStorage(); const localClient = new TgglLocalClient({ apiKey: serverApiKey, storage, // Pass the storage instance refreshInterval: 60000, // Refresh flags from Tggl API every minute }); try { await localClient.waitReady(); // Wait for initial flags to be fetched const serverContext = { userId: 'server-user-456', environment: 'production' }; if (localClient.get(serverContext, 'new-api-endpoint', false)) { console.log('Server: Using new API endpoint for this context!'); } else { console.log('Server: Using old API endpoint.'); } const featureVariant = localClient.get({ userId: 'another-user-789' }, 'feature-x-variant', 'control'); console.log(`Server: 'feature-x-variant' for 'another-user-789' is: ${featureVariant}`); } catch (error) { console.error("Error with TgglLocalClient initialization or flag evaluation:", error); } finally { // Important: Stop background processes for local client when done (e.g., on server shutdown) localClient.stopReporting?.(); localClient.stopRefreshing?.(); } } runFeatureFlagExample();