fix(resolve): always use module condition

packages/vite/src/node/plugins/resolve.ts

@@ -1101,8 +1101,6 @@ function resolveExportsOrImports(
         return options.isProduction
       case 'development':
         return !options.isProduction
-      case 'module':
-        return !options.isRequire
     }
     return true
   })

playground/resolve/__tests__/resolve.spec.ts

@@ -67,6 +67,15 @@ test('Respect exports to take precedence over mainFields', async () => {
   expect(await page.textContent('.exports-with-module')).toMatch('[success]')
 })
 
+test('import and require resolve using module condition', async () => {
+  expect(await page.textContent('.exports-with-module-condition')).toMatch(
+    '[success]',
+  )
+  expect(
+    await page.textContent('.exports-with-module-condition-required'),
+  ).toMatch('[success]')
+})
+
 test('implicit dir/index.js', async () => {
   expect(await page.textContent('.index')).toMatch('[success]')
 })

playground/resolve/exports-with-module-condition-required/index.js

@@ -0,0 +1,3 @@
+/* eslint-disable import/no-commonjs */
+const { msg } = require('@vitejs/test-resolve-exports-with-module-condition')
+module.exports = { msg }

playground/resolve/exports-with-module-condition-required/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "@vitejs/test-resolve-exports-with-module-condition-required",
+  "private": true,
+  "version": "1.0.0",
+  "main": "index.js",
+  "dependencies": {
+    "@vitejs/test-resolve-exports-with-module-condition": "link:../exports-with-module-condition"
+  }
+}

playground/resolve/exports-with-module-condition/index.esm.js

@@ -0,0 +1 @@
+export const msg = '[success] exports with module condition (index.esm.js)'

playground/resolve/exports-with-module-condition/index.js

@@ -0,0 +1,2 @@
+/* eslint-disable import/no-commonjs */
+module.exports.msg = '[fail] exports with module condition (index.js)'

playground/resolve/exports-with-module-condition/index.mjs

@@ -0,0 +1 @@
+export const msg = '[fail] exports with module condition (index.mjs)'

playground/resolve/exports-with-module-condition/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@vitejs/test-resolve-exports-with-module-condition",
+  "private": true,
+  "version": "1.0.0",
+  "exports": {
+    "module": "./index.esm.js",
+    "import": "./index.mjs",
+    "require": "./index.js"
+  }
+}

playground/resolve/index.html

@@ -36,6 +36,13 @@ <h2>Exports with legacy fallback</h2>
 <h2>Exports with module</h2>
 <p class="exports-with-module">fail</p>
 
+<h2>
+  Both import and require resolve using module condition (avoids dual package
+  hazard)
+</h2>
+<p class="exports-with-module-condition">fail</p>
+<p class="exports-with-module-condition-required">fail</p>
+
 <h2>Resolving top level with imports field</h2>
 <p class="imports-top-level">fail</p>
 
@@ -214,6 +221,14 @@ <h2>resolve package that contains # in path</h2>
   import { msg as exportsWithModule } from '@vitejs/test-resolve-exports-with-module'
   text('.exports-with-module', exportsWithModule)
 
+  import { msg as exportsWithModuleCondition } from '@vitejs/test-resolve-exports-with-module-condition'
+  import { msg as exportsWithModuleConditionRequired } from '@vitejs/test-resolve-exports-with-module-condition-required'
+  text('.exports-with-module-condition', exportsWithModuleCondition)
+  text(
+    '.exports-with-module-condition-required',
+    exportsWithModuleConditionRequired,
+  )
+
   // imports field
   import { msg as importsTopLevel } from '#top-level'
   text('.imports-top-level', importsTopLevel)

playground/resolve/package.json

@@ -34,6 +34,8 @@
     "@vitejs/test-resolve-exports-legacy-fallback": "link:./exports-legacy-fallback",
     "@vitejs/test-resolve-exports-path": "link:./exports-path",
     "@vitejs/test-resolve-exports-with-module": "link:./exports-with-module",
+    "@vitejs/test-resolve-exports-with-module-condition": "link:./exports-with-module-condition",
+    "@vitejs/test-resolve-exports-with-module-condition-required": "link:./exports-with-module-condition-required",
     "@vitejs/test-resolve-linked": "workspace:*",
     "@vitejs/test-resolve-imports-pkg": "link:./imports-path/other-pkg",
     "@vitejs/test-resolve-sharp-dir": "link:./sharp-dir"

playground/resolve/vite.config.js

@@ -102,6 +102,7 @@ export default defineConfig({
   ],
   optimizeDeps: {
     include: [
+      '@vitejs/test-resolve-exports-with-module-condition-required',
       '@vitejs/test-require-pkg-with-module-field',
       '@vitejs/test-resolve-sharp-dir',
     ],