One post tagged with "express"

Node.js backend applications require robust feature management for APIs, microservices, and server-side logic. Feature flags provide the perfect solution for controlling backend functionality, managing database migrations, and enabling safe deployments in Node.js environments.

Why Node.js Backends Need Feature Flags​

Node.js applications power millions of APIs and microservices worldwide. Feature flags in Node.js enable:

• Zero-downtime deployments of new API endpoints
• Database migration safety with gradual rollouts
• API versioning without maintaining multiple codebases
• Kill switches for problematic features
• A/B testing at the API level

const { FlagpoleClient } = require("@flagpole/node");

const client = new FlagpoleClient({
  apiKey: "fp_live_your_api_key",
  environments: ["production"],
  fallbacks: {
    "new-payment-gateway": false,
    "enhanced-analytics": false,
  },
});

await client.initialize();

// Safe feature rollout
if (await client.isFeatureEnabled("new-payment-gateway")) {
  return await processPaymentV2(paymentData);
} else {
  return await processPaymentV1(paymentData);
}