feat!: increase generated tsconfig.json strictness (#3204)

Author: johannschopplich

src/core/build/types.ts

@@ -190,19 +190,24 @@ 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: */
+        module: "Preserve",
         jsx: "preserve",
-        allowSyntheticDefaultImports: true,
         jsxFactory: "h",
         jsxFragmentFactory: "Fragment",
         paths: {