fix(resolve): resolve tsconfig paths starting with # (#22038)

sapphi-red · web-flow · commit 3460fc55aa89 · 2026-04-02T13:34:35.000+09:00
diff --git a/packages/vite/src/node/plugins/resolve.ts b/packages/vite/src/node/plugins/resolve.ts
@@ -516,6 +516,7 @@ function resolveSubpathImports(
     }
   }
 
+  if (importsPath == null) return
   return importsPath + postfix
 }
 
diff --git a/playground/resolve-tsconfig-paths/__tests__/resolve.spec.ts b/playground/resolve-tsconfig-paths/__tests__/resolve.spec.ts
@@ -9,6 +9,10 @@ test('import from .js', async () => {
   await expect.poll(() => page.textContent('.js')).toMatch('[success]')
 })
 
+test('import using # prefixed path', async () => {
+  await expect.poll(() => page.textContent('.hash')).toMatch('[success]')
+})
+
 test('fallback works', async () => {
   await expect.poll(() => page.textContent('.fallback')).toMatch('[success]')
 })
diff --git a/playground/resolve-tsconfig-paths/index.html b/playground/resolve-tsconfig-paths/index.html
@@ -9,6 +9,9 @@ <h2>Import from .js</h2>
 <h2>Fallback works</h2>
 <p class="fallback"></p>
 
+<h2>Import using # prefixed path</h2>
+<p class="hash"></p>
+
 <h2>Nested tsconfig.json & references / include works</h2>
 <p class="nested-a"></p>
 <p class="nested-b"></p>
@@ -27,6 +30,9 @@ <h2>Nested tsconfig.json & references / include works</h2>
   import fallback from '@fallback/fallback'
   text('.fallback', fallback)
 
+  import hash from './src/hash.ts'
+  text('.hash', hash)
+
   import { valueA, valueB } from './src/nested/index.ts'
   text('.nested-a', valueA)
   text('.nested-b', valueB)
diff --git a/playground/resolve-tsconfig-paths/src/hash.ts b/playground/resolve-tsconfig-paths/src/hash.ts
@@ -0,0 +1 @@
+export { default } from '#/imported'
diff --git a/playground/resolve-tsconfig-paths/tsconfig.json b/playground/resolve-tsconfig-paths/tsconfig.json
@@ -4,7 +4,8 @@
     "noEmit": true,
     "paths": {
       "@/*": ["./src/*"],
-      "@fallback/*": ["./src/*", "./fallback/*"]
+      "@fallback/*": ["./src/*", "./fallback/*"],
+      "#/*": ["./src/*"]
     }
   },
   "exclude": ["./__tests__"]

Original file line number	Diff line number	Diff line change
`@@ -516,6 +516,7 @@ function resolveSubpathImports(`
`516`	`516`	`}`
`517`	`517`	`}`
`518`	`518`
	`519`	`+ if (importsPath == null) return`
`519`	`520`	`return importsPath + postfix`
`520`	`521`	`}`
`521`	`522`