diff --git a/.github/workflows/platform-tests-vercel.yml b/.github/workflows/platform-tests-vercel.yml
index c17c9be6b9d1..13411077f5d0 100644
--- a/.github/workflows/platform-tests-vercel.yml
+++ b/.github/workflows/platform-tests-vercel.yml
@@ -44,3 +44,26 @@ jobs:
with:
test-app-dir: packages/adapter-vercel/test/apps/basic
deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+
+ test-split:
+ if: github.repository == 'sveltejs/kit'
+ runs-on: ubuntu-latest
+ timeout-minutes: 15
+ environment: '@sveltejs/adapter-vercel platform tests'
+ steps:
+ - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+ with:
+ ref: ${{ inputs.sha || github.sha }}
+ persist-credentials: false
+
+ - uses: ./.github/actions/vercel-deploy
+ id: deploy
+ with:
+ vercel-project-id: ${{ secrets.VERCEL_PROJECT_ID_SPLIT }}
+ vercel-token: ${{ secrets.VERCEL_TOKEN }}
+ vercel-org-id: ${{ secrets.VERCEL_ORG_ID }}
+
+ - uses: ./.github/actions/platform-test
+ with:
+ test-app-dir: packages/adapter-vercel/test/apps/split
+ deployment-url: ${{ steps.deploy.outputs.deployment-url }}
diff --git a/packages/adapter-vercel/test/apps/basic/tsconfig.json b/packages/adapter-vercel/test/apps/basic/tsconfig.json
index ca10a5d09eba..619fe2dd9d72 100644
--- a/packages/adapter-vercel/test/apps/basic/tsconfig.json
+++ b/packages/adapter-vercel/test/apps/basic/tsconfig.json
@@ -10,5 +10,6 @@
"skipLibCheck": true,
"sourceMap": true,
"moduleResolution": "bundler"
- }
+ },
+ "include": ["src", "test", "playwright.config.js", "vite.config.ts"]
}
diff --git a/packages/adapter-vercel/test/apps/split/package.json b/packages/adapter-vercel/test/apps/split/package.json
new file mode 100644
index 000000000000..130925759762
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/package.json
@@ -0,0 +1,20 @@
+{
+ "name": "test-vercel-split",
+ "version": "0.0.1",
+ "private": true,
+ "scripts": {
+ "dev": "vite dev",
+ "preview": "vite preview",
+ "build": "vite build",
+ "prepare": "svelte-kit sync || echo ''",
+ "test:platform": "playwright test"
+ },
+ "devDependencies": {
+ "@sveltejs/kit": "workspace:*",
+ "@sveltejs/vite-plugin-svelte": "catalog:",
+ "svelte": "catalog:",
+ "typescript": "catalog:",
+ "vite": "catalog:"
+ },
+ "type": "module"
+}
diff --git a/packages/adapter-vercel/test/apps/split/playwright.config.js b/packages/adapter-vercel/test/apps/split/playwright.config.js
new file mode 100644
index 000000000000..33d36b651014
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/playwright.config.js
@@ -0,0 +1 @@
+export { config as default } from '../../utils.js';
diff --git a/packages/adapter-vercel/test/apps/split/src/app.d.ts b/packages/adapter-vercel/test/apps/split/src/app.d.ts
new file mode 100644
index 000000000000..da08e6da592d
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/src/app.d.ts
@@ -0,0 +1,13 @@
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+ namespace App {
+ // interface Error {}
+ // interface Locals {}
+ // interface PageData {}
+ // interface PageState {}
+ // interface Platform {}
+ }
+}
+
+export {};
diff --git a/packages/adapter-vercel/test/apps/split/src/app.html b/packages/adapter-vercel/test/apps/split/src/app.html
new file mode 100644
index 000000000000..f273cc58f7eb
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/src/app.html
@@ -0,0 +1,11 @@
+
+
+
+
+
+ %sveltekit.head%
+
+
+ %sveltekit.body%
+
+
diff --git a/packages/adapter-vercel/test/apps/split/src/routes/+layout.svelte b/packages/adapter-vercel/test/apps/split/src/routes/+layout.svelte
new file mode 100644
index 000000000000..a54cfdcb7efa
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/src/routes/+layout.svelte
@@ -0,0 +1,5 @@
+
+
+{@render children()}
diff --git a/packages/adapter-vercel/test/apps/split/src/routes/+page.svelte b/packages/adapter-vercel/test/apps/split/src/routes/+page.svelte
new file mode 100644
index 000000000000..57d50b6f11b3
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/src/routes/+page.svelte
@@ -0,0 +1,5 @@
+Hello from SvelteKit on Vercel
+
+
diff --git a/packages/adapter-vercel/test/apps/split/src/routes/a/+page.svelte b/packages/adapter-vercel/test/apps/split/src/routes/a/+page.svelte
new file mode 100644
index 000000000000..445d9a0d621b
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/src/routes/a/+page.svelte
@@ -0,0 +1 @@
+This route will be served by a different function because we use the split config
diff --git a/packages/adapter-vercel/test/apps/split/test/test.ts b/packages/adapter-vercel/test/apps/split/test/test.ts
new file mode 100644
index 000000000000..95250e9e1d71
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/test/test.ts
@@ -0,0 +1,8 @@
+import { expect, test } from '@playwright/test';
+
+test('split functions work', async ({ page }) => {
+ await page.goto('/');
+ await expect(page.locator('h1')).toContainText('Hello from SvelteKit on Vercel');
+ await page.goto('/a');
+ await expect(page.locator('p')).toContainText(/split config/);
+});
diff --git a/packages/adapter-vercel/test/apps/split/tsconfig.json b/packages/adapter-vercel/test/apps/split/tsconfig.json
new file mode 100644
index 000000000000..619fe2dd9d72
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/tsconfig.json
@@ -0,0 +1,15 @@
+{
+ "extends": "$app/tsconfig",
+ "compilerOptions": {
+ "rewriteRelativeImportExtensions": true,
+ "allowJs": true,
+ "checkJs": true,
+ "esModuleInterop": true,
+ "forceConsistentCasingInFileNames": true,
+ "resolveJsonModule": true,
+ "skipLibCheck": true,
+ "sourceMap": true,
+ "moduleResolution": "bundler"
+ },
+ "include": ["src", "test", "playwright.config.js", "vite.config.ts"]
+}
diff --git a/packages/adapter-vercel/test/apps/split/vite.config.ts b/packages/adapter-vercel/test/apps/split/vite.config.ts
new file mode 100644
index 000000000000..0b40b6378475
--- /dev/null
+++ b/packages/adapter-vercel/test/apps/split/vite.config.ts
@@ -0,0 +1,13 @@
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+import adapter from '../../../index.js';
+
+export default defineConfig({
+ plugins: [
+ sveltekit({
+ adapter: adapter({
+ split: true
+ })
+ })
+ ]
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ef91f2258c1b..7a26948907df 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -451,6 +451,24 @@ importers:
specifier: 'catalog:'
version: 8.1.5(@types/node@22.19.19)(esbuild@0.28.1)(jiti@2.4.2)(yaml@2.9.0)
+ packages/adapter-vercel/test/apps/split:
+ devDependencies:
+ '@sveltejs/kit':
+ specifier: workspace:*
+ version: link:../../../../kit
+ '@sveltejs/vite-plugin-svelte':
+ specifier: 'catalog:'
+ version: 7.0.0(svelte@5.56.3(@typescript-eslint/types@8.61.1))(vite@8.1.5(@types/node@22.19.19)(esbuild@0.28.1)(jiti@2.4.2)(yaml@2.9.0))
+ svelte:
+ specifier: 'catalog:'
+ version: 5.56.3(@typescript-eslint/types@8.61.1)
+ typescript:
+ specifier: 'catalog:'
+ version: 6.0.3
+ vite:
+ specifier: 'catalog:'
+ version: 8.1.5(@types/node@22.19.19)(esbuild@0.28.1)(jiti@2.4.2)(yaml@2.9.0)
+
packages/amp:
devDependencies:
'@sveltejs/kit':