live demo

Select a flag · tune its props · watch users resolve to value or fallback

A/B test: which hero copy does this user see?

"control" | "challenger"
fallbackcontrol
enabled
Flag is live — rollout decides who gets value vs fallback
value
What users inside rollout receive
rollout
% of users that receive value · rest get fallback
50%
user_42b72fallback → control
user_99b30value → challenger
user_07b1value → challenger
user_88b62fallback → control
user_42fallback
✦ beta
Feature flags for TS.
Schema-first.
✓ Express checkout
user_99value
✦ beta
New
Ship flags faster.
✓ Express checkout
user_07value
New
Ship flags faster.
Legacy checkout
user_88fallback
✦ beta
Feature flags for TS.
Schema-first.
✓ Express checkout