How to Build Feature Flags with LaunchDarkly
Implement feature flags for controlled rollouts and experimentation
Intermediate
2-4 hours
Prerequisites
Before you begin, make sure you have the following ready.
LaunchDarkly account
Application to integrate
Features to flag
What You Will Build
A feature flag system for safe deployments and A/B testing
Key Features
Feature toggles
User targeting
Percentage rollouts
A/B testing
Audit logs
Step-by-Step Tutorial
Follow these steps to build your with .
1
Set up LaunchDarkly
Create account and project
2
Create your first flag
Define a feature flag in the dashboard
3
Integrate the SDK
Add LaunchDarkly to your application
4
Implement flag checks
Add conditional logic based on flags
5
Set up targeting
Configure user targeting rules
Common Mistakes to Avoid
Too many flags
No cleanup process
Missing fallbacks
Next Steps
Once you have completed this tutorial, consider these enhancements.
Add targeting rules
Implement experiments
Set up workflows
Learn More
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Master feature flags at Buildday Melbourne
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