netlify-edge-functions

Write and configure Netlify Edge Functions — TypeScript/JavaScript handlers running in a Deno runtime at the network edge. Use when adding auth middleware or auth redirects, geolocation or localization logic, A/B testing or personalization, request/response transforms (rewrites/redirects), or edge SSR to a Netlify site. Triggers on tasks like "add an edge function", "auth check at the edge", "redirect visitors by country", "A/B test with cookies", "rewrite requests", "personalize by geo", or "cache an edge response". Covers the config export, path routing, the Context object, response caching, environment variables, and edge-vs-serverless choices. Check the framework's adapter first — only hand-write an edge function when the framework doesn't already generate one.