❌ Wrong setup

Vite should only be loaded in development (or when building). Loading it in production is unnecessary and significantly bloats the production process.

In production:

Make sure you don't load the vite package nor Vike's Vite plugin.
Make sure you don't call createDevMiddleware(). (The development middleware isn't needed in production.)
You can import createDevMiddleware in production, but make sure you don't call it.
```
// Environment: production
import { createDevMiddleware } from 'vike/server' // ✅ You can import it
createDevMiddleware()                             // ❌ You shouldn't call it
```
If you use +server.js or +serverEntry.js, the development middleware is automatically created — you don't need to use createDevMiddleware() at all. (You only need createDevMiddleware() if you run the server yourself.)

❌ Wrong setup

See also