fix: improve compatibility with native Node CJS resolution

packages/vite-node/src/client.ts

@@ -247,24 +247,21 @@ export class ViteNodeRunner {
         return Reflect.get(exports, p, receiver)
       },
       set(_, p, value) {
-        // Node also allows access of named exports via exports.default
-        // https://nodejs.org/api/esm.html#commonjs-namespaces
-        if (p !== 'default') {
-          if (!Reflect.has(exports, 'default'))
-            exports.default = {}
-
-          // returns undefined, when accessing named exports, if default is not an object
-          // but is still present inside hasOwnKeys, this is Node behaviour for CJS
-          if (exports.default === null || typeof exports.default !== 'object') {
-            defineExport(exports, p, () => undefined)
-            return true
-          }
-
-          exports.default[p] = value
-          defineExport(exports, p, () => value)
+        if (!Reflect.has(exports, 'default'))
+          exports.default = {}
+
+        // returns undefined, when accessing named exports, if default is not an object
+        // but is still present inside hasOwnKeys, this is Node behaviour for CJS
+        if (exports.default === null || typeof exports.default !== 'object') {
+          defineExport(exports, p, () => undefined)
           return true
         }
-        return Reflect.set(exports, p, value)
+
+        exports.default[p] = value
+        if (p !== 'default')
+          defineExport(exports, p, () => value)
+
+        return true
       },
     })
 
@@ -274,7 +271,7 @@ export class ViteNodeRunner {
     const moduleProxy = {
       set exports(value) {
         exportAll(cjsExports, value)
-        cjsExports.default = value
+        exports.default = value
       },
       get exports() {
         return cjsExports

test/cjs/src/other.cjs

@@ -0,0 +1,2 @@
+'use strict'
+exports.default = 2

test/cjs/src/other.d.cts

@@ -0,0 +1,5 @@
+declare const defaultExports: {
+  default: number
+}
+
+export default defaultExports

test/cjs/test/named-default.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest'
+
+import * as other from '../src/other.cjs'
+import defaultOther from '../src/other.cjs'
+
+describe('correctly identified named default', () => {
+  it('default should be on default', () => {
+    expect(other.default).toBe(defaultOther)
+  })
+
+  it('default is an object with default', () => {
+    expect(other.default).toMatchObject({ default: 2 })
+    expect(defaultOther).toMatchObject({ default: 2 })
+  })
+})

test/stacktraces/test/runner.test.ts

@@ -31,6 +31,6 @@ describe('stacktraces should respect sourcemaps', async () => {
       const index = lines.findIndex(val => val.includes(`${file}:`))
       const msg = lines.slice(index, index + 8).join('\n')
       expect(msg).toMatchSnapshot(file)
-    }, 10000)
+    }, 30000)
   }
 })