Remote functions break Vitest tests with jsdom/happy-dom
### Describe the bug
Importing a remote function (*.remote.ts) into a Vitest test that runs under a DOM environment (happy-dom or jsdom) throws at collection time:
```
[vite] (ssr) Error when evaluating SSR module .../src/lib/data.remote.ts: __SVELTEKIT_PATHS_BASE__ is not defined
ReferenceError: __SVELTEKIT_PATHS_BASE__ is not defined
Plugin: vite-plugin-sveltekit-remote
```
This was working fine with 2.55.0 but started to break with the 2.56.0 upgrade.
The same test passes under environment: 'node'. The test never touches the DOM itself - the failure happens while the plugin evaluates the imported remote module, before any test runs.
### Reproduction
Created a minimal repro here: https://github.com/cemreyavuz/sveltekit-remote-vitest-repro.
```
bun install
bun run sync
TEST_ENV=node bunx vitest run # ✅ passes
TEST_ENV=happy-dom bunx vitest run # ❌ ReferenceError: __SVELTEKIT_PATHS_BASE__ is not defined
TEST_ENV=jsdom bunx vitest run # ❌ ReferenceError: __SVELTEKIT_PATHS_BASE__ is not defined
```
### Logs
```Shell
$ TEST_ENV=happy-dom bunx vitest run
RUN v4.1.10 /repro
1:59:12 PM [vite] (ssr) Error when evaluating SSR module /repro/src/lib/data.remote.ts: __SVELTEKIT_PATHS_BASE__ is not defined
at eval (/repro/node_modules/@sveltejs/kit/src/runtime/app/paths/internal/server.js:11:12)
at ESModulesEvaluator.runInlinedModule (file:///repro/node_modules/vite/dist/node/module-runner.js:913:161)
at SSRCompatModuleRunner.directRequest (file:///repro/node_modules/vite/dist/node/module-runner.js:1146:80)
at SSRCompatModuleRunner.directRequest (file:///repro/node_modules/vite/dist/node/chunks/config.js:15184:22)
at SSRCompatModuleRunner.cachedRequest (file:///repro/node_modules/vite/dist/node/module-runner.js:1053:73)
at eval (/repro/node_modules/@sveltejs/kit/src/runtime/app/paths/server.js:9:31)
at ESModulesEvaluator.runInlinedModule (file:///repro/node_modules/vite/dist/node/module-runner.js:913:3)
at SSRCompatModuleRunner.directRequest (file:///repro/node_modules/vite/dist/node/module-runner.js:1146:59)
at SSRCompatModuleRunner.directRequest (file:///repro/node_modules/vite/dist/node/chunks/config.js:15184:22)
at SSRCompatModuleRunner.cachedRequest (file:///repro/node_modules/vite/dist/node/module-runner.js:1053:73)
❯ src/data.spec.ts (0 test)
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Failed Suites 1 ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
FAIL src/data.spec.ts [ src/data.spec.ts ]
ReferenceError: __SVELTEKIT_PATHS_BASE__ is not defined
Plugin: vite-plugin-sveltekit-remote
File: /repro/src/lib/data.remote.ts
❯ eval node_modules/@sveltejs/kit/src/runtime/app/paths/internal/server.js:11:12
10| * this one's the original non-relative base path
11| */
12| export const initial_base = initial.base;
| ^
13|
14| /**
❯ SSRCompatModuleRunner.directRequest node_modules/vite/dist/node/chunks/config.js:15184:22
❯ eval node_modules/@sveltejs/kit/src/runtime/app/paths/server.js:9:31
❯ SSRCompatModuleRunner.directRequest node_modules/vite/dist/node/chunks/config.js:15184:22
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[1/1]⎯
Test Files 1 failed (1)
Tests no tests
Start at 13:59:11
Duration 189ms (transform 11ms, setup 0ms, import 0ms, tests 0ms, environment 84ms)
```
### System Info
```Shell
System:
OS: macOS 26.0.1
CPU: (14) arm64 Apple M4 Pro
Memory: 437.39 MB / 24.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 24.14.0 - /Users/cemreyavuz/.nvm/versions/node/v24.14.0/bin/node
Yarn: 1.22.22 - /Users/cemreyavuz/.nvm/versions/node/v24.14.0/bin/yarn
npm: 11.9.0 - /Users/cemreyavuz/.nvm/versions/node/v24.14.0/bin/npm
pnpm: 10.32.1 - /Users/cemreyavuz/.nvm/versions/node/v24.14.0/bin/pnpm
bun: 1.3.10 - /Users/cemreyavuz/.bun/bin/bun
Browsers:
Chrome: 149.0.7827.201
Safari: 26.0.1
npmPackages:
@sveltejs/adapter-auto: ^6.1.0 => 6.1.1
@sveltejs/kit: 2.68.0 => 2.68.0
@sveltejs/vite-plugin-svelte: 6.2.4 => 6.2.4
svelte: ^5.56.3 => 5.56.4
vite: ^7.3.1 => 7.3.6
```
### Severity
blocking an upgrade
### Additional Information
_No response_
0 条评论