From 2302a9e6e5f9d657009af7d5883c97cba5bfc221 Mon Sep 17 00:00:00 2001
From: Ben McCann <322311+benmccann@users.noreply.github.com>
Date: Thu, 7 Oct 2021 16:26:55 -0700
Subject: [PATCH] [fix] improve type of `init` (#2544)

---
 .changeset/five-bags-prove.md          | 5 +++++
 packages/kit/src/core/preview/index.js | 2 +-
 packages/kit/types/app.d.ts            | 9 +--------
 packages/kit/types/internal.d.ts       | 9 +++++++++
 4 files changed, 16 insertions(+), 9 deletions(-)
 create mode 100644 .changeset/five-bags-prove.md

diff --git a/.changeset/five-bags-prove.md b/.changeset/five-bags-prove.md
new file mode 100644
index 000000000000..07fd2af940b5
--- /dev/null
+++ b/.changeset/five-bags-prove.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] improve type of `init`
diff --git a/packages/kit/src/core/preview/index.js b/packages/kit/src/core/preview/index.js
index c4d7a62bd034..5b1568ecc78b 100644
--- a/packages/kit/src/core/preview/index.js
+++ b/packages/kit/src/core/preview/index.js
@@ -35,7 +35,7 @@ export async function preview({
 
 	const app_file = resolve(cwd, `${SVELTE_KIT}/output/server/app.js`);
 
-	/** @type {import('types/app').App} */
+	/** @type {import('types/internal').App} */
 	const app = await import(pathToFileURL(app_file).href);
 
 	/** @type {import('sirv').RequestHandler} */
diff --git a/packages/kit/types/app.d.ts b/packages/kit/types/app.d.ts
index 467c8b57369b..0fbe02bd9d7f 100644
--- a/packages/kit/types/app.d.ts
+++ b/packages/kit/types/app.d.ts
@@ -2,14 +2,7 @@ import { ReadOnlyFormData, RequestHeaders } from './helper';
 import { ServerResponse } from './hooks';
 
 export interface App {
-	init(options?: {
-		paths: {
-			base: string;
-			assets: string;
-		};
-		prerendering: boolean;
-		read(file: string): Buffer;
-	}): void;
+	init(): void;
 	render(incoming: IncomingRequest): Promise<ServerResponse>;
 }
 
diff --git a/packages/kit/types/internal.d.ts b/packages/kit/types/internal.d.ts
index ab2977dc2f47..8f9aa5105eb6 100644
--- a/packages/kit/types/internal.d.ts
+++ b/packages/kit/types/internal.d.ts
@@ -19,6 +19,15 @@ export interface PrerenderOptions {
 }
 
 export interface App extends PublicApp {
+	init(options?: {
+		paths: {
+			base: string;
+			assets: string;
+		};
+		prerendering: boolean;
+		read(file: string): Buffer;
+	}): void;
+
 	render(
 		incoming: IncomingRequest,
 		options?: {