E-commerce applications are increasingly popular and modern front-end frameworks like Angular and React enable the creation of fast and responsive single-page apps. Feature flags can be used in e-commerce environments to provide granular control and feature visibility, allowing for controlled rollouts of new features, personalized shopping experiences, and promotion management. In this article, an open-source Angular application demonstrates the power of feature flagging in an e-commerce context using LaunchDarkly's JavaScript SDK. The integration involves creating a service to initialize the LaunchDarkly client and setting up a listener for changes in feature flags, allowing dynamic updates to the app's content. This approach provides a safety net for managing discrepancies in pricing and discounts. The code is available on GitHub for further exploration.