From 407429a09cec505909ec04fc4f545bfb0c1215ac Mon Sep 17 00:00:00 2001
From: Boshen <1430279+Boshen@users.noreply.github.com>
Date: Wed, 9 Jul 2025 09:13:18 +0000
Subject: [PATCH] feat(napi/parser,napi/transform): accept `lang=dts` (#12154)

---
 crates/oxc_napi/src/lib.rs        | 1 +
 napi/parser/index.d.ts            | 4 ++--
 napi/parser/src/types.rs          | 4 ++--
 napi/parser/test/parse.test.ts    | 8 +++++++-
 napi/transform/index.d.ts         | 4 ++--
 napi/transform/src/transformer.rs | 4 ++--
 pnpm-lock.yaml                    | 2 --
 7 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/crates/oxc_napi/src/lib.rs b/crates/oxc_napi/src/lib.rs
index 430573dfc6ee4..6fe70318a5300 100644
--- a/crates/oxc_napi/src/lib.rs
+++ b/crates/oxc_napi/src/lib.rs
@@ -68,6 +68,7 @@ pub fn get_source_type(
         Some("jsx") => SourceType::jsx(),
         Some("ts") => SourceType::ts(),
         Some("tsx") => SourceType::tsx(),
+        Some("dts") => SourceType::d_ts(),
         _ => SourceType::from_path(filename).unwrap_or_default(),
     };
     match source_type {
diff --git a/napi/parser/index.d.ts b/napi/parser/index.d.ts
index 7ea81ee0e379c..a57863391a57e 100644
--- a/napi/parser/index.d.ts
+++ b/napi/parser/index.d.ts
@@ -137,8 +137,8 @@ export declare const enum ImportNameKind {
 export declare function parseAsync(filename: string, sourceText: string, options?: ParserOptions | undefined | null): Promise<ParseResult>
 
 export interface ParserOptions {
-  /** Treat the source text as `js`, `jsx`, `ts`, or `tsx`. */
-  lang?: 'js' | 'jsx' | 'ts' | 'tsx'
+  /** Treat the source text as `js`, `jsx`, `ts`, `tsx` or `dts`. */
+  lang?: 'js' | 'jsx' | 'ts' | 'tsx' | 'dts'
   /** Treat the source text as `script` or `module` code. */
   sourceType?: 'script' | 'module' | 'unambiguous' | undefined
   /**
diff --git a/napi/parser/src/types.rs b/napi/parser/src/types.rs
index 222fcbba18143..7a41ef1e4c528 100644
--- a/napi/parser/src/types.rs
+++ b/napi/parser/src/types.rs
@@ -7,8 +7,8 @@ use oxc_napi::{Comment, OxcError};
 #[napi(object)]
 #[derive(Default)]
 pub struct ParserOptions {
-    /// Treat the source text as `js`, `jsx`, `ts`, or `tsx`.
-    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx'")]
+    /// Treat the source text as `js`, `jsx`, `ts`, `tsx` or `dts`.
+    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx' | 'dts'")]
     pub lang: Option<String>,
 
     /// Treat the source text as `script` or `module` code.
diff --git a/napi/parser/test/parse.test.ts b/napi/parser/test/parse.test.ts
index 7fb2636580a8b..092b1e7c43f94 100644
--- a/napi/parser/test/parse.test.ts
+++ b/napi/parser/test/parse.test.ts
@@ -2,7 +2,7 @@ import { Worker } from 'node:worker_threads';
 import { describe, expect, it, test } from 'vitest';
 
 import { parseAsync, parseSync } from '../index.js';
-import type { ExpressionStatement, ParserOptions, TSTypeAliasDeclaration } from '../index.js';
+import type { ExpressionStatement, ParserOptions, TSTypeAliasDeclaration, VariableDeclaration } from '../index.js';
 
 describe('parse', () => {
   const code = '/* comment */ foo';
@@ -55,6 +55,12 @@ describe('parse', () => {
       // Parsed as `await 1`
       expect((ret.program.body[0] as ExpressionStatement).expression.type).toBe('AwaitExpression');
     });
+    test('sets lang as dts', () => {
+      const code = 'declare const foo';
+      const ret = parseSync('test', code, { lang: 'dts' });
+      expect(ret.errors.length).toBe(0);
+      expect((ret.program.body[0] as VariableDeclaration).declare).toBe(true);
+    });
   });
 
   describe('TS properties', () => {
diff --git a/napi/transform/index.d.ts b/napi/transform/index.d.ts
index 90407f524efdd..c1ce33cb8b26a 100644
--- a/napi/transform/index.d.ts
+++ b/napi/transform/index.d.ts
@@ -359,8 +359,8 @@ export declare function transform(filename: string, sourceText: string, options?
  * @see {@link transform}
  */
 export interface TransformOptions {
-  /** Treat the source text as `js`, `jsx`, `ts`, or `tsx`. */
-  lang?: 'js' | 'jsx' | 'ts' | 'tsx'
+  /** Treat the source text as `js`, `jsx`, `ts`, `tsx`, or `dts`. */
+  lang?: 'js' | 'jsx' | 'ts' | 'tsx' | 'dts'
   /** Treat the source text as `script` or `module` code. */
   sourceType?: 'script' | 'module' | 'unambiguous' | undefined
   /**
diff --git a/napi/transform/src/transformer.rs b/napi/transform/src/transformer.rs
index a2e4ddca2822d..ba962e13e93e9 100644
--- a/napi/transform/src/transformer.rs
+++ b/napi/transform/src/transformer.rs
@@ -86,8 +86,8 @@ pub struct TransformResult {
 #[napi(object)]
 #[derive(Default)]
 pub struct TransformOptions {
-    /// Treat the source text as `js`, `jsx`, `ts`, or `tsx`.
-    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx'")]
+    /// Treat the source text as `js`, `jsx`, `ts`, `tsx`, or `dts`.
+    #[napi(ts_type = "'js' | 'jsx' | 'ts' | 'tsx' | 'dts'")]
     pub lang: Option<String>,
 
     /// Treat the source text as `script` or `module` code.
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3b9a9b21dc87d..371afdb96ab71 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -146,8 +146,6 @@ importers:
 
   npm/runtime: {}
 
-  npm/wasm-web: {}
-
   tasks/compat_data:
     devDependencies:
       degit: