Welcome to Flagix Documentation

Flagix is a lightweight feature flag management platform designed to help teams safely deploy and control features. With support for gradual rollouts, A/B testing, and user targeting, Flagix enables you to ship features faster while maintaining control over your releases.

What are Feature Flags?

Feature flags (also known as feature toggles) are a software development technique that lets you enable or disable features without deploying new code. This powerful approach gives you:

Instant Control: Turn features on or off in real-time
Risk Mitigation: Roll back problematic features instantly
Gradual Rollouts: Release features to subsets of users
A/B Testing: Test different variations with your users
Targeted Delivery: Show features to specific user segments

Why Choose Flagix?

Developer Friendly

Simple SDKs for JavaScript and React
Minimal setup required
TypeScript support out of the box

Real-time Updates

Changes reflect instantly in your applications

Advanced Targeting

Target specific users or segments
Attribute-based targeting
Percentage-based rollouts

Analytics & Insights

Track flag usage and performance
Monitor experiment results
Conversion tracking

Enterprise Ready

Multi-environment support
Role-based access control
Audit logs

Key Concepts

Variations

Each flag can have multiple variations that represent different values:

// Boolean variation
const isNewUI = Flagix.evaluate("new-ui"); // true or false

// String variation
const theme = Flagix.evaluate("theme-mode"); // "light", "dark", "auto"

// Number variation
const timeoutMs = Flagix.evaluate("api-timeout"); // 5000, 10000, 30000

Rules & Targeting

Rules determine which users see which variations:

Targeting Rules: Serve a specific variation to users matching certain conditions
Experiment Rules: Split traffic between variations for A/B testing
Percentage Rollouts: Gradually release features to a percentage of users

Environments

Manage flags separately across development, staging, and production with isolated configurations for each environment.

Getting Started

Ready to integrate Flagix into your application?

Installation - Set up the SDK in your project
Creating Flags - Create and configure your first flag
User Targeting - Set up targeting rules
Analytics - Track usage and measure impact

How Flagix Works

The evaluation flow:

Your application calls Flagix.evaluate(flagKey) with user context
The SDK evaluates rules locally
Returns the appropriate variation value
Automatically tracks the evaluation for analytics
Real-time updates push flag changes to all connected clients
Reactive Updates: When user attributes change (like a plan upgrade), the SDK notifies all components to re-evaluate instantly

This ensures evaluations are instant, reliable, and low-latency since they happen locally without network calls.

Introduction