fix: call tryFsResolve for relative new URL(foo, import.meta.url)

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

@@ -14,6 +14,8 @@ import {
 import { CLIENT_ENTRY } from '../constants'
 import { fileToUrl } from './asset'
 import { preloadHelperId } from './importAnalysisBuild'
+import type { InternalResolveOptions } from './resolve'
+import { tryFsResolve } from './resolve'
 
 /**
  * Convert `new URL('./foo.png', import.meta.url)` to its resolved built URL
@@ -29,6 +31,16 @@ export function assetImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
   const normalizedPublicDir = normalizePath(config.publicDir)
   let assetResolver: ResolveFn
 
+  const fsResolveOptions: InternalResolveOptions = {
+    ...config.resolve,
+    root: config.root,
+    isProduction: config.isProduction,
+    isBuild: config.command === 'build',
+    packageCache: config.packageCache,
+    ssrConfig: config.ssr,
+    asSrc: true,
+  }
+
   return {
     name: 'vite:asset-import-meta-url',
     async transform(code, id, options) {
@@ -98,6 +110,7 @@ export function assetImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
           let file: string | undefined
           if (url[0] === '.') {
             file = slash(path.resolve(path.dirname(id), url))
+            file = tryFsResolve(file, fsResolveOptions) ?? file
           } else {
             assetResolver ??= config.createResolver({
               extensions: [],

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

@@ -498,7 +498,7 @@ function splitFileAndPostfix(path: string) {
   return { file, postfix: path.slice(file.length) }
 }
 
-function tryFsResolve(
+export function tryFsResolve(
   fsPath: string,
   options: InternalResolveOptions,
   tryIndex = true,

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

@@ -17,6 +17,8 @@ import type { ResolveFn } from '..'
 import type { WorkerType } from './worker'
 import { WORKER_FILE_ID, workerFileToUrl } from './worker'
 import { fileToUrl } from './asset'
+import type { InternalResolveOptions } from './resolve'
+import { tryFsResolve } from './resolve'
 
 const ignoreFlagRE = /\/\*\s*@vite-ignore\s*\*\//
 
@@ -99,6 +101,16 @@ export function workerImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
   const isBuild = config.command === 'build'
   let workerResolver: ResolveFn
 
+  const fsResolveOptions: InternalResolveOptions = {
+    ...config.resolve,
+    root: config.root,
+    isProduction: config.isProduction,
+    isBuild: config.command === 'build',
+    packageCache: config.packageCache,
+    ssrConfig: config.ssr,
+    asSrc: true,
+  }
+
   return {
     name: 'vite:worker-import-meta-url',
 
@@ -143,6 +155,7 @@ export function workerImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
           let file: string | undefined
           if (url[0] === '.') {
             file = path.resolve(path.dirname(id), url)
+            file = tryFsResolve(file, fsResolveOptions) ?? file
           } else {
             workerResolver ??= config.createResolver({
               extensions: [],

playground/assets/__tests__/assets.spec.ts

@@ -312,6 +312,15 @@ test('new URL("/...", import.meta.url)', async () => {
   )
 })
 
+test('new URL(..., import.meta.url) without extension', async () => {
+  expect(await page.textContent('.import-meta-url-without-extension')).toMatch(
+    isBuild ? 'data:application/javascript' : 'nested/test.js',
+  )
+  expect(
+    await page.textContent('.import-meta-url-content-without-extension'),
+  ).toContain('export default class')
+})
+
 test('new URL(`${dynamic}`, import.meta.url)', async () => {
   expect(await page.textContent('.dynamic-import-meta-url-1')).toMatch(
     isBuild ? 'data:image/png;base64' : '/foo/nested/icon.png',

playground/assets/index.html

@@ -190,6 +190,14 @@ <h2>new URL('/...', import.meta.url)</h2>
 <img class="import-meta-url-base-path-img" />
 <code class="import-meta-url-base-path"></code>
 
+<h2>new URL('...', import.meta.url (without extension))</h2>
+<p>
+  <code class="import-meta-url-content-without-extension"></code>
+</p>
+<p>
+  <code class="import-meta-url-without-extension"></code>
+</p>
+
 <h2>new URL('...', import.meta.url,) (with comma)</h2>
 <img class="import-meta-url-img-comma" />
 <code class="import-meta-url-comma"></code>
@@ -393,6 +401,13 @@ <h3>assets in noscript</h3>
   text('.import-meta-url-base-path', metaUrlBasePath)
   document.querySelector('.import-meta-url-base-path-img').src = metaUrlBasePath
 
+  const metaUrlWithoutExtension = new URL('./nested/test', import.meta.url)
+  text('.import-meta-url-without-extension', metaUrlWithoutExtension)
+  ;(async () => {
+    const res = await fetch(metaUrlWithoutExtension)
+    text('.import-meta-url-content-without-extension', await res.text())
+  })()
+
   // prettier-ignore
   const metaUrlWithComma = new URL('./nested/asset.png', import.meta.url,)
   text('.import-meta-url-comma', metaUrlWithComma)

playground/worker/__tests__/es/es-worker.spec.ts

@@ -113,6 +113,11 @@ test('module worker', async () => {
     'A string',
     true,
   )
+  await untilUpdated(
+    () => page.textContent('.worker-import-meta-url-without-extension'),
+    'A string',
+    true,
+  )
   await untilUpdated(
     () => page.textContent('.shared-worker-import-meta-url'),
     'A string',

playground/worker/__tests__/iife/iife-worker.spec.ts

@@ -98,6 +98,11 @@ test('module worker', async () => {
     /A\sstring.*\/iife\/.+url-worker\.js/,
     true,
   )
+  await untilUpdated(
+    () => page.textContent('.worker-import-meta-url-without-extension'),
+    'A string',
+    true,
+  )
   await untilUpdated(
     () => page.textContent('.shared-worker-import-meta-url'),
     'A string',

playground/worker/index.html

@@ -56,6 +56,12 @@ <h2 class="format-iife">format iife:</h2>
 </p>
 <code class="worker-import-meta-url-resolve"></code>
 
+<p>
+  new Worker(new URL('./url-worker', import.meta.url), { type: 'module' })
+  <span class="classname">.worker-import-meta-url-without-extension</span>
+</p>
+<code class="worker-import-meta-url-without-extension"></code>
+
 <p>
   new SharedWorker(new URL('./url-shared-worker.js', import.meta.url), { type:
   'module' })

playground/worker/worker/main-module.js

@@ -90,6 +90,15 @@ wResolve.addEventListener('message', (ev) =>
   text('.worker-import-meta-url-resolve', JSON.stringify(ev.data)),
 )
 
+// url import worker without extension
+const wWithoutExt = new Worker(
+  new URL('../url-worker', import.meta.url),
+  /* @vite-ignore */ workerOptions,
+)
+wWithoutExt.addEventListener('message', (ev) =>
+  text('.worker-import-meta-url-without-extension', JSON.stringify(ev.data)),
+)
+
 const genWorkerName = () => 'module'
 const w2 = new SharedWorker(
   new URL('../url-shared-worker.js', import.meta.url),