test: add test for vitejs#9652

playground/resolve/__tests__/resolve.spec.ts

@@ -97,6 +97,10 @@ test('Resolve module field if browser field is likely UMD or CJS', async () => {
   expect(await page.textContent('.browser-module2')).toMatch('[success]')
 })
 
+test('Resolve module field if browser field is likely IIFE', async () => {
+  expect(await page.textContent('.browser-module3')).toMatch('[success]')
+})
+
 test('css entry', async () => {
   expect(await page.textContent('.css')).toMatch('[success]')
 })

playground/resolve/browser-module-field3/index.js

@@ -0,0 +1 @@
+export default '[success] this should run in browser'

playground/resolve/browser-module-field3/index.web.js

@@ -0,0 +1,7 @@
+var browserModuleField3 = (function () {
+  'use strict'
+
+  var main = '[fail] this should not run in the browser'
+
+  return main
+})()

playground/resolve/browser-module-field3/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "resolve-browser-module-field3",
+  "private": true,
+  "version": "1.0.0",
+  "module": "index.js",
+  "browser": "index.web.js"
+}

playground/resolve/index.html

@@ -82,6 +82,9 @@ <h2>Resolve browser field even if module field exists</h2>
 <h2>Resolve module field if browser field is likely UMD or CJS</h2>
 <p class="browser-module2">fail</p>
 
+<h2>Resolve module field if browser field is likely IIFE</h2>
+<p class="browser-module3">fail</p>
+
 <h2>Don't resolve to the `module` field if the importer is a `require` call</h2>
 <p class="require-pkg-with-module-field">fail</p>
 
@@ -225,6 +228,9 @@ <h2>resolve package that contains # in path</h2>
   import browserModule2 from 'resolve-browser-module-field2'
   text('.browser-module2', browserModule2)
 
+  import browserModule3 from 'resolve-browser-module-field3'
+  text('.browser-module3', browserModule3)
+
   import { msg as requireButWithModuleFieldMsg } from 'require-pkg-with-module-field'
   text('.require-pkg-with-module-field', requireButWithModuleFieldMsg)
 

playground/resolve/package.json

@@ -16,6 +16,7 @@
     "resolve-browser-field": "link:./browser-field",
     "resolve-browser-module-field1": "link:./browser-module-field1",
     "resolve-browser-module-field2": "link:./browser-module-field2",
+    "resolve-browser-module-field3": "link:./browser-module-field3",
     "resolve-custom-condition": "link:./custom-condition",
     "resolve-custom-main-field": "link:./custom-main-field",
     "resolve-exports-env": "link:./exports-env",