LWCIntermediatefeature-flagscustom-metadatawire
Design LWC feature flags via Custom Metadata and @wire
Real World Scenario
Product wants to toggle beta LWC features per region without deployment; current approach uses hardcoded boolean constants requiring releases.
Expected Answer
• Store flags in Custom Metadata Types queried via wire getRecord or Apex cacheable
• Default false for beta; enable per region record in CMDT
• LWC reads flags on load; hide UI sections when disabled
• Combine with Permission Set for user-level beta cohorts
• Log feature usage when flag enabled for analytics
• Avoid mixing flags with FLS — flags are product toggles not security
• Cache CMDT with understanding admin changes propagate on refresh not instantly
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Main difference: use case and scale. Store flags in Custom Metadata Types queried via wire getRecord or Apex cacheable. Default false for beta; enable per region record in CMDT. Pick based on your integration pattern and team capability. Feature flags decouple release cadence from exposure — essential for multi-region enterprise rollouts. Balance speed of delivery with maintainability.
Architect Perspective
Feature flags decouple release cadence from exposure — essential for multi-region enterprise rollouts.