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FlagForge — Feature Flag Manager
A feature-flag dashboard managing six flags, each with an on/off toggle and a percentage rollout slider, paired with a user simulator that…
A feature-flag dashboard managing six flags, each with an on/off toggle and a percentage rollout slider, paired with a user simulator that resolves whether a given user ID or email would receive each feature. Access is computed with a deterministic FNV-1a hash bucketing scheme so results are stable per user and rollout increases only ever add users. State persists in localStorage.
- Deterministic, monotonic percentage-rollout bucketing (standard hash-mod technique)
- Live per-user access simulator with GRANTED/DENIED badges and reasons
- Rollout sliders and toggles that re-run the simulation instantly
- Sample-user chips, random-user shuffle, and reset-to-defaults with localStorage
Built with: Vanilla JavaScript, FNV-1a hashing for deterministic bucketing, localStorage persistence, Range-input rollout sliders, CSS custom properties, Google Fonts / JetBrains Mono