Runtime Feature Toggles
Runtime feature toggles (also known as feature flags) are a software development technique that allows developers to enable or disable features in an application at runtime without deploying new code. This is typically implemented through configuration files, environment variables, or external services that control feature availability. They enable teams to decouple feature release from deployment, facilitating practices like canary releases, A/B testing, and gradual rollouts.
Developers should use runtime feature toggles to reduce deployment risks, test new features in production with a subset of users, and quickly disable problematic features without rolling back entire releases. They are essential for continuous delivery pipelines, allowing for safer and more controlled releases, and are widely used in agile and DevOps environments to manage feature lifecycle from development to full deployment.