Courses / JavaScript
73. Feature flags
Using feature flags to control rollout of frontend features and coordinate cross-team releases.
JavaScript
Feature flags
A feature flag is a runtime toggle that turns a UI feature on or off without deploying new code.
"I want to ship a new button to 10% of users first and turn it off instantly if something breaks."
Feature flagging stores small boolean or variant flags (remote or local) and checks them at runtime to enable or disable code paths, enabling gradual rollouts, A/B testing, and fast kill-switches.
"I want to ship a new button to 10% of users first and turn it off instantly if something breaks."
Feature flagging stores small boolean or variant flags (remote or local) and checks them at runtime to enable or disable code paths, enabling gradual rollouts, A/B testing, and fast kill-switches.