How to deploy UI changes with ZERO risk – PostHog Feature Flags Demo
Learn how to use feature flags to deploy new UI changes to production without affecting users, then gradually roll them out. In this live coding tutorial, Adam (UX Platform Engineer at PostHog) demonstrates:
✅ Deploying code to production behind feature flags (already live, invisible to users)
✅ Using internal flags to test features before public release
✅ Implementing conditional UI rendering based on flag state
✅ Refactoring UX across multiple products safely
✅ Using AI coding tools (Cursor) with feature flag workflows
✅ Testing flag variants in real-time with the PostHog toolbar
✅ Gradually rolling out UI changes across the product
Watch real code implementation: adding a unified scene layout header to surveys while hiding old UI elements, all controlled by a feature flag so changes can be toggled instantly without redeploying.
Perfect for frontend developers, UX engineers, product engineers, and engineering teams who want to ship features safely and iterate quickly.
🔗 Try PostHog: https://posthog.com
📚 Feature Flags Docs: https://posthog.com/docs/feature-flags
📖 Best Practices: https://posthog.com/docs/feature-flag...
#FeatureFlags #Frontend #React #PostHog #WebDevelopment #UIDesign #ContinuousDeployment
What is PostHog? – PostHog is an all-in-one developer platform for building successful products. We provide product analytics, web analytics, session replay, error tracking, feature flags, experiments, surveys, LLM analytics, data warehouse, CDP, and an AI product assistant to help debug your code, ship features faster, and keep all your usage and customer data in one stack.