Feature Fuse Logo
FeatureFuse
Back to blog
Sdk

FeatureFuse SDK Integration Guide (React, Node.js)

Add FeatureFuse to your app in minutes. Initialize, evaluate flags, and handle fallbacks gracefully.

14 min read
FeatureFuse Team

Use the SDK to evaluate flags close to where decisions are made.

Setup

  • Install SDK
  • Authenticate
  • Bootstrap defaults

Evaluation

  • Context attributes
  • Deterministic bucketing
  • Fallback behavior

Client vs. Server

  • Server‑side for sensitive logic
  • Client‑side for UI tweaks
  • Hybrid for performance

Resilience

  • Graceful defaults if provider unavailable
  • Cache evaluations
  • Timeouts and circuit breakers

Example: React Client

  • Initialize early (layout) with bootstrap values
  • Guard rendering on ready state
  • Wrap reads with helpful hooks

Example: Node Server

  • Evaluate flags close to controllers
  • Pass user context (id, plan)
  • Log evaluations for audit

Conclusion

FeatureFuse SDKs offer typed APIs, context helpers, and smart caching to keep evaluations fast and reliable.

More from the blog

11 min

FeatureFuse vs. Homegrown Flags: Build or Buy?

Weigh cost, reliability, and velocity. When a managed platform outperforms DIY flag systems.

12 min

Feature Flags in Monorepos: Patterns that Scale

Avoid flag sprawl with naming conventions, shared types, and cross-service governance in monorepos.

10 min

Security & Compliance Considerations for Feature Flags

Handle PII carefully, log evaluations responsibly, and scope access when using flags at scale.

12 min

Getting Value from FeatureFuse Analytics

Track exposure, adoption, and performance. Tie rollouts to outcomes using FeatureFuse analytics.

10 min

Canary Releases Explained: Reduce Risk with Gradual Exposure

Route a small percent of traffic to new code paths. Measure, compare, and expand safely with flags.

11 min

Managing Toggle Debt in Growing Codebases

Flags that outlive their purpose create maintenance risk. Put governance and SLAs in place to clean them up.