fix(scanner): respect tsconfig.json (#21547)

sapphi-red · web-flow · commit c6c04db9c67d · 2026-02-04T21:52:58.000+09:00
diff --git a/packages/vite/src/node/optimizer/scan.ts b/packages/vite/src/node/optimizer/scan.ts
@@ -35,8 +35,7 @@ import { BaseEnvironment } from '../baseEnvironment'
 import type { DevEnvironment } from '../server/environment'
 import { transformGlobImport } from '../plugins/importMetaGlob'
 import { cleanUrl } from '../../shared/utils'
-import { loadTsconfigJsonForFile } from '../plugins/esbuild'
-import { setOxcTransformOptionsFromTsconfigOptions } from '../plugins/oxc'
+import { getRollupJsxPresets } from '../plugins/oxc'
 
 export class ScanEnvironment extends BaseEnvironment {
   mode = 'scan' as const
@@ -253,23 +252,17 @@ async function prepareRolldownScanner(
     environment.config.optimizeDeps.rolldownOptions ?? {}
 
   const plugins = await asyncFlatten(arraify(pluginsFromConfig))
-
   plugins.push(...rolldownScanPlugin(environment, deps, missing, entries))
 
-  // The plugin pipeline automatically loads the closest tsconfig.json.
-  // But Rolldown doesn't support reading tsconfig.json (https://github.com/rolldown/rolldown/issues/4968).
-  // Due to syntax incompatibilities between the experimental decorators in TypeScript and TC39 decorators,
-  // we cannot simply set `"experimentalDecorators": true` or `false`. (https://github.com/vitejs/vite/pull/15206#discussion_r1417414715)
-  // Therefore, we use the closest tsconfig.json from the root to make it work in most cases.
-  const { tsconfig } = await loadTsconfigJsonForFile(
-    path.join(environment.config.root, '_dummy.js'),
-  )
   const transformOptions = deepClone(rolldownOptions.transform) ?? {}
-  setOxcTransformOptionsFromTsconfigOptions(
-    transformOptions,
-    tsconfig.compilerOptions,
-    [], // NOTE: ignore warnings as the same warning will be shown by the plugin container
-  )
+  if (transformOptions.jsx === undefined) {
+    transformOptions.jsx = {}
+  } else if (
+    transformOptions.jsx === 'react' ||
+    transformOptions.jsx === 'react-jsx'
+  ) {
+    transformOptions.jsx = getRollupJsxPresets(transformOptions.jsx)
+  }
   if (typeof transformOptions.jsx === 'object') {
     transformOptions.jsx.development ??= !environment.config.isProduction
   }
diff --git a/packages/vite/src/node/plugins/oxc.ts b/packages/vite/src/node/plugins/oxc.ts
@@ -53,7 +53,9 @@ export interface OxcOptions extends Omit<
   jsxRefreshExclude?: string | RegExp | ReadonlyArray<string | RegExp>
 }
 
-function getRollupJsxPresets(preset: 'react' | 'react-jsx'): OxcJsxOptions {
+export function getRollupJsxPresets(
+  preset: 'react' | 'react-jsx',
+): OxcJsxOptions {
   switch (preset) {
     case 'react':
       return {
@@ -72,7 +74,7 @@ function getRollupJsxPresets(preset: 'react' | 'react-jsx'): OxcJsxOptions {
   preset satisfies never
 }
 
-export function setOxcTransformOptionsFromTsconfigOptions(
+function setOxcTransformOptionsFromTsconfigOptions(
   oxcOptions: Omit<OxcTransformOptions, 'jsx'> & {
     jsx?:
       | OxcTransformOptions['jsx']
