From b858eff539215060fa11a5ffd76fadf0a2d1f346 Mon Sep 17 00:00:00 2001
From: Johann Schopplich <mail@johannschopplich.com>
Date: Mon, 10 Mar 2025 07:18:08 +0100
Subject: [PATCH 1/2] feat!: increase generated `tsconfig.json` strictness

---
 src/core/build/types.ts | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/src/core/build/types.ts b/src/core/build/types.ts
index ee4cb19969..76761adbac 100644
--- a/src/core/build/types.ts
+++ b/src/core/build/types.ts
@@ -190,19 +190,25 @@ export async function writeTypes(nitro: Nitro) {
     const tsconfigDir = dirname(tsConfigPath);
     const tsConfig: TSConfig = defu(nitro.options.typescript.tsConfig, {
       compilerOptions: {
-        forceConsistentCasingInFileNames: true,
-        strict: nitro.options.typescript.strict,
-        noEmit: true,
+        /* Base options: */
+        esModuleInterop: true,
+        allowSyntheticDefaultImports: true,
+        skipLibCheck: true,
         target: "ESNext",
-        module: "ESNext",
-        moduleResolution:
-          nitro.options.experimental.typescriptBundlerResolution === false
-            ? "Node"
-            : "Bundler",
         allowJs: true,
         resolveJsonModule: true,
+        moduleDetection: "force",
+        isolatedModules: true,
+        verbatimModuleSyntax: true,
+        /* Strictness */
+        strict: nitro.options.typescript.strict,
+        noUncheckedIndexedAccess: true,
+        noImplicitOverride: true,
+        forceConsistentCasingInFileNames: true,
+        /* If NOT transpiling with TypeScript: */
+        // TODO: consider using 'module: preserve' (requires TS 5.4+)
+        module: "ESNext",
         jsx: "preserve",
-        allowSyntheticDefaultImports: true,
         jsxFactory: "h",
         jsxFragmentFactory: "Fragment",
         paths: {

From 76dc36f479c905fc233221ab1d0358ed0f0503ec Mon Sep 17 00:00:00 2001
From: Johann Schopplich <mail@johannschopplich.com>
Date: Mon, 10 Mar 2025 11:23:50 +0100
Subject: [PATCH 2/2] fix: update TypeScript module setting to 'Preserve'

---
 src/core/build/types.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/core/build/types.ts b/src/core/build/types.ts
index 76761adbac..ad1eba814d 100644
--- a/src/core/build/types.ts
+++ b/src/core/build/types.ts
@@ -206,8 +206,7 @@ export async function writeTypes(nitro: Nitro) {
         noImplicitOverride: true,
         forceConsistentCasingInFileNames: true,
         /* If NOT transpiling with TypeScript: */
-        // TODO: consider using 'module: preserve' (requires TS 5.4+)
-        module: "ESNext",
+        module: "Preserve",
         jsx: "preserve",
         jsxFactory: "h",
         jsxFragmentFactory: "Fragment",