[Bug?]: `nitroV2Plugin` doesn't generate a valid output with Cloudflare presets

[dario-piotrowicz]

Duplicates

• I have searched the existing issues

Latest version

• I have tested the latest version

Current behavior 😯

When using the "@solidjs/vite-plugin-nitro-2" plugin Cloudflare presets (like cloudflare-module) don't generate a functioning application.

They generate an application that when run via npx wrangler dev returns a 500 response:

Note that using directly the nitro plugin from "nitro/vite" does instead.

Expected behavior 🤔

The "@solidjs/vite-plugin-nitro-2" plugin would produce valid Cloudflare Workers in the same way the official nitro plugin does. (especially since the "@solidjs/vite-plugin-nitro-2"plugin does accept apreset` in its options parameter).

Steps to reproduce 🕹

Steps:

1. Create a new solid-start app via npm create solid, select:
   (the options not listed are not relevant)
   • ◇ What type of project would you like to create?
     │ SolidStart
   • ◇ Which version of SolidStart?
     │ v2 (pre-release, recommended)
   • ◇ Which template would you like to use?
     │ basic
2. cd into the project's directory, run npm i
3. in the /vite.config.ts file add the cloudflare-module preset to the nitro plugin:

   import { defineConfig } from "vite";
   import { nitroV2Plugin as nitro } from "@solidjs/vite-plugin-nitro-2";
   
   import { solidStart } from "@solidjs/start/config";
   
   export default defineConfig({
    plugins: [solidStart(),
   -   nitro()
   +   nitro({ preset: 'cloudflare-module' })
    ]
   });

4. run npm run build
5. run npx wrangler dev .output/server/index.mjs --assets .output/public (as suggested by the npm run build output)
6. Try visiting the page and it won't work

Context 🔦

At Cloudflare we have the create-cloudflare CLI npm create cloudflare which scaffolds projects for users. It supports most frameworks including solidStart, however we noticed that recently, after solid switched to the @solidjs/vite-plugin-nitro-2 plugin, the solidStart integration of create-cloudflare broke and we would love it if we could fix it. I'm happy to try to help with whatever fix might be necessary here 🙂 (I don't have a lot of context and I don't really know what the switch was made from the official nitro plugin to the solid specific one).

But note that this issue is valid regardless on create-cloudflare. As far as I can tell, the use of the new solid specific plugin prevents the deployment of any solidStart applications to Cloudflare.

Your environment 🌎

System:
    OS: macOS 26.3.1
    CPU: (10) arm64 Apple M1 Pro
Binaries:
    Node: 22.21.1
    Yarn: 1.22.22
    npm: 10.9.4
    pnpm: 10.30.2
npmPackages:
   @solidjs/start: 2.0.0-alpha.2
   @solidjs/vite-plugin-nitro-2: 0.1.0
   (nitro: 3.0.260311-beta)

[dario-piotrowicz]

With some AI assistance I got a solution working that does make sense to me: solution, I'm happy to open a PR to propose this change if you think the approach looks valid 🙂 (I haven't opened it yet to respect your contributing instructions)