Fetch errors from `import.meta.glob` paths in `preview`

[stephenlrandall]

Describe the bug

A follow-up to #13362. When using import.meta.glob and then fetching the resulting files, any non-inlined assets in the built application have /_app/immutable/... paths. When deployed (https://stephenlrandall.github.io/kit-preview-issue/), this works fine. But during preview, "Not found" errors are produced.

Reproduction

https://github.com/stephenlrandall/kit-preview-issue

Logs

requesting resource: /_app/immutable/assets/sample.lmZegr8j.json
SyntaxError: Unexpected token 'N', "Not found" is not valid JSON
    at JSON.parse (<anonymous>)
    at Proxy.<anonymous> (file:///Users/randasl1/Desktop/kit-cors-issue/.svelte-kit/output/server/index.js:1324:25)
    at async load (file:///Users/randasl1/Desktop/kit-cors-issue/.svelte-kit/output/server/entries/pages/_page.js:8:16)
    at async load_data (file:///Users/randasl1/Desktop/kit-cors-issue/.svelte-kit/output/server/index.js:1231:18)
    at async file:///Users/randasl1/Desktop/kit-cors-issue/.svelte-kit/output/server/index.js:2794:18

System Info

System:
    OS: macOS 15.3.1
    CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 47.19 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.8.0 - /usr/local/bin/node
    npm: 10.1.0 - /usr/local/bin/npm
    pnpm: 10.4.1 - /usr/local/bin/pnpm
  Browsers:
    Chrome: 133.0.6943.127
    Edge: 133.0.3065.82
    Safari: 18.3
  npmPackages:
    @sveltejs/adapter-static: ^3.0.8 => 3.0.8 
    @sveltejs/kit: ^2.17.3 => 2.17.3 
    @sveltejs/vite-plugin-svelte: ^4.0.4 => 4.0.4 
    svelte: ^5.20.4 => 5.20.4 
    vite: ^5.4.14 => 5.4.14

Severity

serious, but I can work around it

Additional Information

The workaround is to just not use preview, which isn't the end of the world but isn't really a workaround either.

[stephenlrandall]

@eltigerchino Is this related to the previously closed issue #11020?

[eltigerchino]

@eltigerchino Is this related to the previously closed issue #11020?

No, this is a separate issue. The server is trying to read the file from the server but cannot find it because it is not in the manifest. The difference between the local preview and your deployment is that the local preview is running your app in Node and uses the server while the preview deployment renders the page on the client which has no issues fetching the public asset. To more accurately preview your local build, you'll want to only serve the static files such as by running pnpx serve build

[stephenlrandall]

Makes sense; appreciate the explanation and the fix!