In short
Toggles that let you enable or disable features at runtime without deploying new code — used for gradual rollouts, A/B testing, and safely shipping incomplete work.
How to learn this
- 1Add a simple boolean feature flag (even hardcoded) gating one feature in a project.
- 2Read how a feature-flag service (LaunchDarkly, GrowthBook) manages flags remotely.
- 3Learn why flags let teams ship code to production before a feature is fully 'launched'.
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