Daily Term: Feature Toggle

Feature Toggle

A Feature Toggle (or feature flag) is a technique to enable or disable features in an application without deploying new code. For example, a team might deploy a new feature but keep it hidden behind a toggle, enabling it only for testing or a subset of users. Feature toggles support gradual rollouts and A/B testing, allowing quick rollbacks if issues arise, but they require careful management to avoid technical debt from unused toggles.

Date: 2025-09-21

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Previous Terms

Rolling Deployment

Gradually updating servers with a new version.

Date: 2025-09-20

Canary Deployment

Releasing to a small subset of users first.

Date: 2025-09-19