Luke Murray • 4/4/2026

Remove Build-Time Environment Variables with Azure App Configuration with Front Door for Static Web Apps

This article addresses the common pain point of build-time environment variable injection in SPAs and static web apps, such as React or Vue applications. It explains how Azure App Configuration integrated with Azure Front Door allows runtime configuration fetching via CDN, eliminating the need to rebuild for different environments. The article covers the problem of hardcoded URLs, the architecture shift to runtime config, and why Front Door is needed for authentication. It includes a proof of concept using preview SDKs and highlights benefits like single artifact deployment and dynamic feature flags.

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#environment variables #Single Page Application #Azure Front Door