Stop Flickering UIs: Handle Subdomains with Next.js Edge Middleware ⚡

The Challenge of Dynamic Subdomains When scaling a professional B2B SaaS platform at Smart Tech Devs, providing clients with their own custom subdomains (e.g., acme.smarttechdevs.in ) is a premium feature that instantly elevates your brand. However, architecting this on the frontend can be complex. In a monolithic React app, you might find yourself writing messy `useEffect` hooks to parse the window.location.host and render different components based on the URL. This approach is slow, causes scr