How to incrementally migrate from Express to the standard Request/Response API

You want to migrate to the modern way to write JavaScript servers , which is supported across JavaScript runtimes . Deno.serve , Bun.serve , Cloudflare Workers etc. – they all use the same standards-based Request / Response API for route handlers: export const handler = (req: Request) => { return new Response(`Hello ${req.url}`); } But how do you incrementally migrate from your existing Express…