npm run dev should have an option to output build files

[thequailman]

Describe the problem

When developing my frontend code, I like having my backend serve the dev assets like in production. In webpack, I can do this by configuring the middleware settings. This helps because I can use relative paths from the frontend to the backend, i.e. /api.

Describe the proposed solution

I believe SvelteKit just needs to honor the config "vite.server.middlewareMode = ssr" in svelte.config.js. Though #2232 make this seem like it may be harder to do.

Alternatives considered

I could try doing HTTP proxying from my backend to the frontend, it's just a pain to wire up.

Importance

would make my life easier

Additional Information

No response

[Conduitry]

I don't know how this would work, since one of the core ideas of Vite's dev mode is that pretty much everything is only transformed on-demand when a page you visit needs it.

The middlewareMode setting doesn't seem related to this as far as I can tell.

I would recommend a proxy solution instead.

[bluwy]

I don't see this being possible either. One of the reason Vite is fast is because it doesn't rely on the filesystem for dev mode and keep things in memory. A lot of stuff happens in memory and today it's not really possible to serialize them into the filesystem, and to be run separately via a node server for example. Adding in adapters, it sounds like it would open a can of worms. Hence, I don't think this is something worth pursuing at the moment.