ilyaliao · May 24, 2026
diff --git a/playground/composables/DefaultClass.ts b/playground/composables/DefaultClass.ts
@@ -0,0 +1 @@
+export default class DefaultClass {}
diff --git a/src/node/scan-dirs.ts b/src/node/scan-dirs.ts
@@ -87,6 +87,7 @@ const RE_EXCLAMATION_PREFIX = /^!/
 const RE_FILE_EXT = /\.\w+$/
 const RE_NAME_SEPARATOR = /[-_.]/
 const RE_DTS_EXT = /\.d\.[mc]?ts$/
+const RE_DEFAULT_CLASS_EXPORT = /^export\s+default\s+class(?![\w$])/
 
 function resolveGlobsExclude(glob: string, cwd: string) {
   return `${glob.startsWith('!') ? '!' : ''}${resolve(cwd, glob.replace(RE_EXCLAMATION_PREFIX, ''))}`
@@ -195,6 +196,11 @@ export async function scanExports(filepath: string, includeTypes: boolean, seen
     // see STR_SPLITTERS: https://github.com/unjs/scule/blob/main/src/index.ts
     const as = RE_NAME_SEPARATOR.test(name) ? camelCase(name) : name
     imports.push({ name: 'default', as, from: filepath })
+
+    // Emit a paired type entry for a default-exported class.
+    if (RE_DEFAULT_CLASS_EXPORT.test(code.slice(defaultExport.start))) {
+      imports.push({ name: 'default', as, from: filepath, type: true, declarationType: 'class' })
+    }
   }
 
   async function toImport(exports: ESMExport[], additional?: Partial<Import>) {

diff --git a/test/dts.test.ts b/test/dts.test.ts
@@ -64,12 +64,13 @@
  expect(
    (await generateTypeDeclarations()).replaceAll(cwd, '<root>'),
  )
    .toMatchInlineSnapshot(`
      "export {}
      declare global {
         const $: typeof import('jquery').$
         const BAR: typeof import('<root>/playground/composables/comma-separated').BAR
         const CustomEnum: typeof import('<root>/playground/composables/index').CustomEnum
+        const DefaultClass: typeof import('<root>/playground/composables/DefaultClass').default
         const FOO: typeof import('<root>/playground/composables/comma-separated').FOO
         const PascalCased: typeof import('<root>/playground/composables/PascalCased').PascalCased
         const THREE: typeof import('three')
@@ -112,6 +113,9 @@
         export type { JQuery } from 'jquery'
         import('jquery')
         // @ts-ignore
+        export type { default as DefaultClass } from '<root>/playground/composables/DefaultClass'
+        import('<root>/playground/composables/DefaultClass')
+        // @ts-ignore
         export type { PascalCased } from '<root>/playground/composables/PascalCased'
         import('<root>/playground/composables/PascalCased')
         // @ts-ignore

diff --git a/test/scan-dirs.test.ts b/test/scan-dirs.test.ts
@@ -13,7 +13,7 @@
      }))
      .sort((a, b) => a.as!.localeCompare(b.as!)),
    )
      .toMatchInlineSnapshot(`
        [
          {
            "as": "BAR",
@@ -49,6 +49,18 @@
             "name": "CustomType1",
             "type": true,
           },
+          {
+            "as": "DefaultClass",
+            "from": "DefaultClass.ts",
+            "name": "default",
+          },
+          {
+            "as": "DefaultClass",
+            "declarationType": "class",
+            "from": "DefaultClass.ts",
+            "name": "default",
+            "type": true,
+          },
           {
             "as": "foo",
             "from": "foo.ts",