provide access to request context via event.platform

.changeset/polite-files-relate.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-vercel': minor
+---
+
+feat: provide access to request context via `event.platform`

packages/adapter-vercel/ambient.d.ts

@@ -1,8 +1,12 @@
-declare module 'SERVER' {
-	export { Server } from '@sveltejs/kit';
-}
+import { RequestContext } from '@vercel/edge';
 
-declare module 'MANIFEST' {
-	import { SSRManifest } from '@sveltejs/kit';
-	export const manifest: SSRManifest;
+declare global {
+	namespace App {
+		export interface Platform {
+			/**
+			 * `context` is only available in Edge Functions
+			 */
+			context?: RequestContext;
+		}
+	}
 }

packages/adapter-vercel/files/edge.js

@@ -8,12 +8,16 @@ const initialized = server.init({
 
 /**
  * @param {Request} request
+ * @param {import('@vercel/edge').RequestContext} context
  */
-export default async (request) => {
+export default async (request, context) => {
 	await initialized;
 	return server.respond(request, {
 		getClientAddress() {
 			return /** @type {string} */ (request.headers.get('x-forwarded-for'));
+		},
+		platform: {
+			context
 		}
 	});
 };

packages/adapter-vercel/index.d.ts

@@ -1,4 +1,5 @@
 import { Adapter } from '@sveltejs/kit';
+import './ambient.js';
 
 export default function plugin(config?: Config): Adapter;
 

packages/adapter-vercel/internal.d.ts

@@ -0,0 +1,8 @@
+declare module 'SERVER' {
+	export { Server } from '@sveltejs/kit';
+}
+
+declare module 'MANIFEST' {
+	import { SSRManifest } from '@sveltejs/kit';
+	export const manifest: SSRManifest;
+}

packages/adapter-vercel/package.json

@@ -28,6 +28,7 @@
 		"check": "tsc"
 	},
 	"dependencies": {
+		"@vercel/edge": "^0.3.1",
 		"@vercel/nft": "^0.22.1",
 		"esbuild": "^0.16.3"
 	},

packages/adapter-vercel/tsconfig.json

@@ -14,5 +14,5 @@
 			"@sveltejs/kit": ["../kit/types/index"]
 		}
 	},
-	"include": ["**/*.js", "ambient.d.ts"]
+	"include": ["**/*.js", "index.d.ts", "internal.d.ts"]
 }