From 82dbff5c7e5fc84898c875a3a569ab7189a1cc6d Mon Sep 17 00:00:00 2001
From: Ashley Hunter <ashley.hunter@hotmail.co.uk>
Date: Sat, 21 Mar 2026 22:32:37 +0000
Subject: [PATCH 1/2] fix(compiler): strip abstract keyword from class
 expressions in JIT mode

---
 .../src/component/transform.rs                | 17 ++++++-
 .../tests/integration_test.rs                 | 46 +++++++++++++++++++
 .../integration_test__jit_abstract_class.snap | 21 +++++++++
 3 files changed, 82 insertions(+), 2 deletions(-)
 create mode 100644 crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap

diff --git a/crates/oxc_angular_compiler/src/component/transform.rs b/crates/oxc_angular_compiler/src/component/transform.rs
index 636906434..c2bfbba42 100644
--- a/crates/oxc_angular_compiler/src/component/transform.rs
+++ b/crates/oxc_angular_compiler/src/component/transform.rs
@@ -695,6 +695,8 @@ struct JitClassInfo {
     is_exported: bool,
     /// Whether the class is export default.
     is_default_export: bool,
+    /// Whether the class is abstract.
+    is_abstract: bool,
     /// Constructor parameter info for ctorParameters.
     ctor_params: std::vec::Vec<JitCtorParam>,
     /// Member decorator info for propDecorators.
@@ -1224,6 +1226,7 @@ fn transform_angular_file_jit(
             class_body_end: class.body.span.end,
             is_exported,
             is_default_export,
+            is_abstract: class.r#abstract,
             ctor_params,
             member_decorators,
             decorator_text,
@@ -1343,15 +1346,25 @@ fn transform_angular_file_jit(
         }
 
         // 4c. Class restructuring: `export class X` → `let X = class X`
+        // For abstract classes, also strip the `abstract` keyword since class expressions can't be abstract.
+        let class_keyword_start = if jit_info.is_abstract {
+            let rest = &source[jit_info.class_start as usize..];
+            let offset = rest.find("class").unwrap_or(0);
+            jit_info.class_start + offset as u32
+        } else {
+            jit_info.class_start
+        };
+
         if jit_info.is_exported || jit_info.is_default_export {
             edits.push(Edit::replace(
                 jit_info.stmt_start,
-                jit_info.class_start,
+                class_keyword_start,
                 format!("let {} = ", jit_info.class_name),
             ));
         } else {
-            edits.push(Edit::insert(
+            edits.push(Edit::replace(
                 jit_info.class_start,
+                class_keyword_start,
                 format!("let {} = ", jit_info.class_name),
             ));
         }
diff --git a/crates/oxc_angular_compiler/tests/integration_test.rs b/crates/oxc_angular_compiler/tests/integration_test.rs
index 490d5c8e8..4be2806dc 100644
--- a/crates/oxc_angular_compiler/tests/integration_test.rs
+++ b/crates/oxc_angular_compiler/tests/integration_test.rs
@@ -6406,6 +6406,52 @@ export class TestComponent {
     insta::assert_snapshot!("jit_union_type_ctor_params", result.code);
 }
 
+#[test]
+fn test_jit_abstract_class() {
+    let allocator = Allocator::default();
+    let source = r#"
+import { Injectable } from '@angular/core';
+
+@Injectable()
+export abstract class BaseProvider {
+    protected abstract get name(): string;
+    protected abstract initialize(): void;
+
+    public greet(): string {
+        return `Hello from ${this.name}`;
+    }
+}
+"#;
+
+    let options = ComponentTransformOptions { jit: true, ..Default::default() };
+    let result = transform_angular_file(&allocator, "base.provider.ts", source, &options, None);
+    assert!(!result.has_errors(), "Should not have errors: {:?}", result.diagnostics);
+
+    // The abstract keyword should NOT appear before "class" in the output
+    // (JIT converts to class expression which can't be abstract)
+    assert!(
+        !result.code.contains("abstract class"),
+        "JIT output should not contain 'abstract class'. Got:\n{}",
+        result.code
+    );
+
+    // Should have proper class expression
+    assert!(
+        result.code.contains("let BaseProvider = class BaseProvider"),
+        "JIT output should have class expression. Got:\n{}",
+        result.code
+    );
+
+    // Should have __decorate call
+    assert!(
+        result.code.contains("__decorate("),
+        "JIT output should use __decorate. Got:\n{}",
+        result.code
+    );
+
+    insta::assert_snapshot!("jit_abstract_class", result.code);
+}
+
 // =========================================================================
 // Source map tests
 // =========================================================================
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap
new file mode 100644
index 000000000..0a54dbb93
--- /dev/null
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap
@@ -0,0 +1,21 @@
+---
+source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6452
+expression: result.code
+---
+
+import { Injectable } from '@angular/core';
+import { __decorate } from "tslib";
+
+let BaseProvider = class BaseProvider {
+    protected abstract get name(): string;
+    protected abstract initialize(): void;
+
+    public greet(): string {
+        return `Hello from ${this.name}`;
+    }
+};
+BaseProvider = __decorate([
+    Injectable()
+], BaseProvider);
+export { BaseProvider };

From 48cecda7a8ee06aed1df4f11e58034643eac13ff Mon Sep 17 00:00:00 2001
From: Ashley Hunter <ashley.hunter@hotmail.co.uk>
Date: Mon, 23 Mar 2026 20:02:24 +0000
Subject: [PATCH 2/2] feat(compiler): strip TypeScript syntax from JIT output
 using oxc_transformer
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a `strip_typescript()` post-pass after JIT text-edits that uses
oxc_transformer + oxc_codegen to convert TypeScript → JavaScript. This
handles abstract members, type annotations, parameter properties, and
other TS-only syntax that previously leaked into JIT output.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 Cargo.lock                                    | 306 ++++++++++++++++--
 Cargo.toml                                    |   2 +
 crates/oxc_angular_compiler/Cargo.toml        |   2 +
 .../src/component/transform.rs                |  36 +++
 .../integration_test__jit_abstract_class.snap |  17 +-
 ...gration_test__jit_class_restructuring.snap |  16 +-
 ...ntegration_test__jit_constructor_deps.snap |  25 +-
 .../integration_test__jit_directive.snap      |  21 +-
 .../integration_test__jit_full_component.snap |  41 ++-
 ...integration_test__jit_inline_template.snap |  16 +-
 ...integration_test__jit_prop_decorators.snap |  37 +--
 .../integration_test__jit_style_url.snap      |  16 +-
 .../integration_test__jit_template_url.snap   |  16 +-
 ...tion_test__jit_union_type_ctor_params.snap |  36 +--
 14 files changed, 432 insertions(+), 155 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 60f0062ee..64ccc2f80 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
 [[package]]
 name = "ahash"
 version = "0.7.8"
@@ -59,6 +65,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
 [[package]]
 name = "base64-simd"
 version = "0.7.0"
@@ -99,6 +111,15 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bstr"
 version = "1.12.1"
@@ -154,9 +175,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.56"
+version = "1.2.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aebf35691d1bfb0ac386a69bac2fde4dd276fb618cf8bf4f5318fe285e821bb2"
+checksum = "7a0dd1ca384932ff3641c8718a02769f1698e7563dc6974ffd03346116310423"
 dependencies = [
  "find-msvc-tools",
  "shlex",
@@ -177,6 +198,15 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "cobs"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa961b519f0b462e3a3b4a34b64d119eeaca1d59af726fe450bbba07a9fc0a1"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "compact_str"
 version = "0.9.0"
@@ -201,7 +231,7 @@ dependencies = [
  "encode_unicode",
  "libc",
  "once_cell",
- "windows-sys",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -248,6 +278,24 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "417bef24afe1460300965a25ff4a24b8b45ad011948302ec221e8a0a81eb2c79"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crc32fast"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.6"
@@ -273,6 +321,16 @@ version = "0.8.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "cssparser"
 version = "0.33.0"
@@ -349,6 +407,16 @@ dependencies = [
  "matches",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.5"
@@ -402,6 +470,18 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
+[[package]]
+name = "embedded-io"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
+
+[[package]]
+name = "embedded-io"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+
 [[package]]
 name = "encode_unicode"
 version = "1.0.0"
@@ -421,7 +501,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -445,6 +525,16 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "flate2"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843fba2746e448b37e26a819579957415c8cef339bf08564fe8b7ddbd959573c"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "float-cmp"
 version = "0.10.0"
@@ -569,6 +659,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -822,9 +922,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
 [[package]]
 name = "js-sys"
@@ -865,9 +965,9 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "libc"
-version = "0.2.182"
+version = "0.2.183"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
+checksum = "b5b646652bf6661599e1da8901b3b9522896f01e736bad5f723fe7a3a27f899d"
 
 [[package]]
 name = "libloading"
@@ -978,6 +1078,16 @@ dependencies = [
  "libmimalloc-sys2",
 ]
 
+[[package]]
+name = "miniz_oxide"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
+dependencies = [
+ "adler2",
+ "simd-adler32",
+]
+
 [[package]]
 name = "napi"
 version = "3.8.3"
@@ -1084,9 +1194,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.21.3"
+version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
 [[package]]
 name = "outref"
@@ -1106,6 +1216,19 @@ version = "4.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d211803b9b6b570f68772237e415a029d5a50c65d382910b879fb19d3271f94d"
 
+[[package]]
+name = "oxc-browserslist"
+version = "3.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c86f358f5705f4da4bce0af2792b6d24d64be9c465bdc70a752b2f168c5ff721"
+dependencies = [
+ "flate2",
+ "postcard",
+ "rustc-hash",
+ "serde",
+ "thiserror",
+]
+
 [[package]]
 name = "oxc-miette"
 version = "2.7.0"
@@ -1156,12 +1279,14 @@ dependencies = [
  "oxc-miette",
  "oxc_allocator",
  "oxc_ast",
+ "oxc_codegen",
  "oxc_diagnostics",
  "oxc_parser",
  "oxc_resolver",
  "oxc_semantic",
  "oxc_sourcemap",
  "oxc_span",
+ "oxc_transformer",
  "pathdiff",
  "rustc-hash",
  "semver",
@@ -1242,11 +1367,48 @@ dependencies = [
  "oxc_syntax",
 ]
 
+[[package]]
+name = "oxc_codegen"
+version = "0.122.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e8af47790edfd7cc2d35ff47b70a1746c73388cc498c7f470a9cdc35f89375c"
+dependencies = [
+ "bitflags",
+ "cow-utils",
+ "dragonbox_ecma",
+ "itoa",
+ "oxc_allocator",
+ "oxc_ast",
+ "oxc_data_structures",
+ "oxc_index",
+ "oxc_semantic",
+ "oxc_sourcemap",
+ "oxc_span",
+ "oxc_syntax",
+ "rustc-hash",
+]
+
+[[package]]
+name = "oxc_compat"
+version = "0.122.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3103453f49b58f20dfb5d0d7be109c44975b436ad056fdb046db03e971ee9f64"
+dependencies = [
+ "cow-utils",
+ "oxc-browserslist",
+ "oxc_syntax",
+ "rustc-hash",
+ "serde",
+]
+
 [[package]]
 name = "oxc_data_structures"
 version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "623bffc9732a0d39f248a2e7655d6d1704201790e5a8777aa188a678f1746fe8"
+dependencies = [
+ "ropey",
+]
 
 [[package]]
 name = "oxc_diagnostics"
@@ -1459,6 +1621,54 @@ dependencies = [
  "unicode-id-start",
 ]
 
+[[package]]
+name = "oxc_transformer"
+version = "0.122.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a216c0a1291fcb42f6be51ce32d928921cf2a6e232e43e6339c8e48d0e4048f"
+dependencies = [
+ "base64",
+ "compact_str",
+ "indexmap",
+ "itoa",
+ "memchr",
+ "oxc_allocator",
+ "oxc_ast",
+ "oxc_ast_visit",
+ "oxc_compat",
+ "oxc_data_structures",
+ "oxc_diagnostics",
+ "oxc_ecmascript",
+ "oxc_regular_expression",
+ "oxc_semantic",
+ "oxc_span",
+ "oxc_syntax",
+ "oxc_traverse",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "sha1",
+]
+
+[[package]]
+name = "oxc_traverse"
+version = "0.122.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e1d4f7d8539ccc032bf20a837b075a301a7846c6ded266a7a1889f0cfcae038"
+dependencies = [
+ "itoa",
+ "oxc_allocator",
+ "oxc_ast",
+ "oxc_ast_visit",
+ "oxc_data_structures",
+ "oxc_ecmascript",
+ "oxc_semantic",
+ "oxc_span",
+ "oxc_str",
+ "oxc_syntax",
+ "rustc-hash",
+]
+
 [[package]]
 name = "papaya"
 version = "0.2.3"
@@ -1637,6 +1847,18 @@ version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
 
+[[package]]
+name = "postcard"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6764c3b5dd454e283a30e6dfe78e9b31096d9e32036b5d1eaac7a6119ccb9a24"
+dependencies = [
+ "cobs",
+ "embedded-io 0.4.0",
+ "embedded-io 0.6.1",
+ "serde",
+]
+
 [[package]]
 name = "potential_utf"
 version = "0.1.4"
@@ -1843,6 +2065,16 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "ropey"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93411e420bcd1a75ddd1dc3caf18c23155eda2c090631a85af21ba19e97093b5"
+dependencies = [
+ "smallvec",
+ "str_indices",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "2.1.1"
@@ -1859,7 +2091,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1902,7 +2134,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5b55fb86dfd3a2f5f76ea78310a88f96c4ea21a3031f8d212443d56123fd0521"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1976,6 +2208,17 @@ dependencies = [
  "zmij",
 ]
 
+[[package]]
+name = "sha1"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3bf829a2d51ab4a5ddf1352d8470c140cadc8301b2ae1789db023f01cedd6ba"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -1991,6 +2234,12 @@ dependencies = [
  "outref 0.1.0",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e320a6c5ad31d271ad523dcf3ad13e2767ad8b1cb8f047f75a8aeaf8da139da2"
+
 [[package]]
 name = "simd-json"
 version = "0.17.0"
@@ -2051,6 +2300,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "str_indices"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d08889ec5408683408db66ad89e0e1f93dff55c73a4ccc71c427d5b277ee47e6"
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -2100,7 +2355,7 @@ dependencies = [
  "getrandom 0.4.2",
  "once_cell",
  "rustix",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -2199,6 +2454,12 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+
 [[package]]
 name = "unicode-id-start"
 version = "1.4.0"
@@ -2412,7 +2673,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -2525,6 +2786,15 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
 [[package]]
 name = "windows-targets"
 version = "0.52.6"
@@ -2726,18 +2996,18 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.8.42"
+version = "0.8.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2578b716f8a7a858b7f02d5bd870c14bf4ddbbcf3a4c05414ba6503640505e3"
+checksum = "efbb2a062be311f2ba113ce66f697a4dc589f85e78a4aea276200804cea0ed87"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.42"
+version = "0.8.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e6cc098ea4d3bd6246687de65af3f920c430e236bee1e3bf2e441463f08a02f"
+checksum = "0e8bc7269b54418e7aeeef514aa68f8690b8c0489a06b0136e5f57c4c5ccab89"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 0f58164fc..fab56acfa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -96,6 +96,8 @@ oxc_parser = "0.122"
 oxc_semantic = "0.122"
 oxc_span = "0.122"
 oxc_sourcemap = "6.0.1"
+oxc_transformer = "0.122"
+oxc_codegen = "0.122"
 
 # Internal
 oxc_angular_compiler = { path = "crates/oxc_angular_compiler" }
diff --git a/crates/oxc_angular_compiler/Cargo.toml b/crates/oxc_angular_compiler/Cargo.toml
index 0712ece2b..d2db6c6c6 100644
--- a/crates/oxc_angular_compiler/Cargo.toml
+++ b/crates/oxc_angular_compiler/Cargo.toml
@@ -23,6 +23,8 @@ oxc_parser = { workspace = true }
 oxc_semantic = { workspace = true }
 oxc_span = { workspace = true }
 oxc_sourcemap = { workspace = true }
+oxc_transformer = { workspace = true }
+oxc_codegen = { workspace = true }
 miette = { workspace = true }
 rustc-hash = { workspace = true }
 indexmap = { workspace = true }
diff --git a/crates/oxc_angular_compiler/src/component/transform.rs b/crates/oxc_angular_compiler/src/component/transform.rs
index c2bfbba42..fc3f903d9 100644
--- a/crates/oxc_angular_compiler/src/component/transform.rs
+++ b/crates/oxc_angular_compiler/src/component/transform.rs
@@ -5,6 +5,8 @@
 
 use std::collections::HashMap;
 
+use std::path::Path;
+
 use oxc_allocator::{Allocator, Vec as OxcVec};
 use oxc_ast::ast::{
     Argument, ArrayExpressionElement, Declaration, ExportDefaultDeclarationKind, Expression,
@@ -1140,6 +1142,37 @@ fn build_jit_decorator_text(
 
 /// Transform an Angular TypeScript file in JIT (Just-In-Time) compilation mode.
 ///
+/// Strip TypeScript syntax from JIT output using oxc_transformer.
+///
+/// This runs as a post-pass after JIT text-edits, converting TypeScript → JavaScript.
+/// It handles abstract members, type annotations, parameter properties, etc.
+fn strip_typescript(allocator: &Allocator, path: &str, code: &str) -> String {
+    let source_type = SourceType::from_path(path).unwrap_or_default();
+    let parser_ret = Parser::new(allocator, code, source_type).parse();
+    if parser_ret.panicked {
+        return code.to_string();
+    }
+
+    let mut program = parser_ret.program;
+
+    let semantic_ret =
+        oxc_semantic::SemanticBuilder::new().with_excess_capacity(2.0).build(&program);
+
+    let ts_options =
+        oxc_transformer::TypeScriptOptions { only_remove_type_imports: true, ..Default::default() };
+
+    let transform_options =
+        oxc_transformer::TransformOptions { typescript: ts_options, ..Default::default() };
+
+    let transformer =
+        oxc_transformer::Transformer::new(allocator, Path::new(path), &transform_options);
+    transformer.build_with_scoping(semantic_ret.semantic.into_scoping(), &mut program);
+
+    let codegen_ret = oxc_codegen::Codegen::new().with_source_text(code).build(&program);
+
+    codegen_ret.code
+}
+
 /// JIT mode produces output compatible with Angular's JIT runtime compiler:
 /// - Decorators are downleveled using `__decorate` from tslib
 /// - `templateUrl` is replaced with `angular:jit:template:file;` imports
@@ -1408,6 +1441,9 @@ fn transform_angular_file_jit(
         result.code = apply_edits(source, edits);
     }
 
+    // 5. Strip TypeScript syntax from JIT output
+    result.code = strip_typescript(allocator, path, &result.code);
+
     result
 }
 
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap
index 0a54dbb93..ee2c69e80 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_abstract_class.snap
@@ -3,19 +3,12 @@ source: crates/oxc_angular_compiler/tests/integration_test.rs
 assertion_line: 6452
 expression: result.code
 ---
-
-import { Injectable } from '@angular/core';
+import { Injectable } from "@angular/core";
 import { __decorate } from "tslib";
-
 let BaseProvider = class BaseProvider {
-    protected abstract get name(): string;
-    protected abstract initialize(): void;
-
-    public greet(): string {
-        return `Hello from ${this.name}`;
-    }
+	greet() {
+		return `Hello from ${this.name}`;
+	}
 };
-BaseProvider = __decorate([
-    Injectable()
-], BaseProvider);
+BaseProvider = __decorate([Injectable()], BaseProvider);
 export { BaseProvider };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_class_restructuring.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_class_restructuring.snap
index 3f5f2f3e7..8cad539a8 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_class_restructuring.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_class_restructuring.snap
@@ -1,17 +1,15 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6201
 expression: result.code
 ---
-import { Component } from '@angular/core';
+import { Component } from "@angular/core";
 import { __decorate } from "tslib";
-
 let AppComponent = class AppComponent {
-    title = 'app';
+	title = "app";
 };
-AppComponent = __decorate([
-    Component({
-    selector: 'app-root',
-    template: '<h1>Hello</h1>',
-})
-], AppComponent);
+AppComponent = __decorate([Component({
+	selector: "app-root",
+	template: "<h1>Hello</h1>"
+})], AppComponent);
 export { AppComponent };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_constructor_deps.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_constructor_deps.snap
index 418dddae1..aa55f61f4 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_constructor_deps.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_constructor_deps.snap
@@ -1,22 +1,19 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6164
 expression: result.code
 ---
-import { Component } from '@angular/core';
-import { TitleService } from './title.service';
+import { Component } from "@angular/core";
+import { TitleService } from "./title.service";
 import { __decorate } from "tslib";
-
 let AppComponent = class AppComponent {
-    constructor(private titleService: TitleService) {}
-
-static ctorParameters = () => [
-    { type: TitleService }
-];
+	constructor(titleService) {
+		this.titleService = titleService;
+	}
+	static ctorParameters = () => [{ type: TitleService }];
 };
-AppComponent = __decorate([
-    Component({
-    selector: 'app-root',
-    template: '<h1>Hello</h1>',
-})
-], AppComponent);
+AppComponent = __decorate([Component({
+	selector: "app-root",
+	template: "<h1>Hello</h1>"
+})], AppComponent);
 export { AppComponent };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_directive.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_directive.snap
index 7d7147027..19fcd82d8 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_directive.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_directive.snap
@@ -1,21 +1,16 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6239
 expression: result.code
 ---
-import { Directive, Input } from '@angular/core';
+import { Directive, Input } from "@angular/core";
 import { __decorate } from "tslib";
-
 let HighlightDirective = class HighlightDirective {
-    color: string = 'yellow';
-
-static propDecorators = {
-    color: [{ type: Input }]
+	color = "yellow";
+	static propDecorators = { color: [{ type: Input }] };
 };
-};
-HighlightDirective = __decorate([
-    Directive({
-    selector: '[appHighlight]',
-    standalone: true,
-})
-], HighlightDirective);
+HighlightDirective = __decorate([Directive({
+	selector: "[appHighlight]",
+	standalone: true
+})], HighlightDirective);
 export { HighlightDirective };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_full_component.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_full_component.snap
index 43522bbed..fc1b97be4 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_full_component.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_full_component.snap
@@ -1,33 +1,28 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6295
 expression: result.code
 ---
-import { Component, signal } from '@angular/core';
-import { RouterOutlet } from '@angular/router';
-import { Lib1 } from 'lib1';
-import { TitleService } from './title.service';
+import { Component, signal } from "@angular/core";
+import { RouterOutlet } from "@angular/router";
+import { Lib1 } from "lib1";
+import { TitleService } from "./title.service";
 import { __decorate } from "tslib";
 import __NG_CLI_RESOURCE__0 from "angular:jit:template:file;./app.html";
 import __NG_CLI_RESOURCE__1 from "angular:jit:style:file;./app.css";
-
 let App = class App {
-    titleService;
-    title = signal('app');
-    constructor(titleService: TitleService) {
-        this.titleService = titleService;
-        this.title.set(this.titleService.getTitle());
-    }
-
-static ctorParameters = () => [
-    { type: TitleService }
-];
+	titleService;
+	title = signal("app");
+	constructor(titleService) {
+		this.titleService = titleService;
+		this.title.set(this.titleService.getTitle());
+	}
+	static ctorParameters = () => [{ type: TitleService }];
 };
-App = __decorate([
-    Component({
-    selector: 'app-root',
-    imports: [RouterOutlet, Lib1],
-    template: __NG_CLI_RESOURCE__0,
-    styles: [__NG_CLI_RESOURCE__1],
-})
-], App);
+App = __decorate([Component({
+	selector: "app-root",
+	imports: [RouterOutlet, Lib1],
+	template: __NG_CLI_RESOURCE__0,
+	styles: [__NG_CLI_RESOURCE__1]
+})], App);
 export { App };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_inline_template.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_inline_template.snap
index 0589aaf1c..6516bad0d 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_inline_template.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_inline_template.snap
@@ -1,16 +1,14 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6059
 expression: result.code
 ---
-import { Component } from '@angular/core';
+import { Component } from "@angular/core";
 import { __decorate } from "tslib";
-
 let AppComponent = class AppComponent {};
-AppComponent = __decorate([
-    Component({
-    selector: 'app-root',
-    template: '<h1>Hello</h1>',
-    standalone: true,
-})
-], AppComponent);
+AppComponent = __decorate([Component({
+	selector: "app-root",
+	template: "<h1>Hello</h1>",
+	standalone: true
+})], AppComponent);
 export { AppComponent };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_prop_decorators.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_prop_decorators.snap
index 3b25eeaff..eeba7c537 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_prop_decorators.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_prop_decorators.snap
@@ -1,26 +1,27 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6351
 expression: result.code
 ---
-import { Directive, Input, Output, HostBinding, EventEmitter } from '@angular/core';
+import { Directive, Input, Output, HostBinding, EventEmitter } from "@angular/core";
 import { __decorate } from "tslib";
-
 let HighlightDirective = class HighlightDirective {
-    color: string = 'yellow';
-    title: string = '';
-    colorChange = new EventEmitter<string>();
-    isActive = false;
-
-static propDecorators = {
-    color: [{ type: Input }],
-    title: [{ type: Input, args: ['aliasName'] }],
-    colorChange: [{ type: Output }],
-    isActive: [{ type: HostBinding, args: ['class.active'] }]
+	color = "yellow";
+	title = "";
+	colorChange = new EventEmitter();
+	isActive = false;
+	static propDecorators = {
+		color: [{ type: Input }],
+		title: [{
+			type: Input,
+			args: ["aliasName"]
+		}],
+		colorChange: [{ type: Output }],
+		isActive: [{
+			type: HostBinding,
+			args: ["class.active"]
+		}]
+	};
 };
-};
-HighlightDirective = __decorate([
-    Directive({
-    selector: '[appHighlight]',
-})
-], HighlightDirective);
+HighlightDirective = __decorate([Directive({ selector: "[appHighlight]" })], HighlightDirective);
 export { HighlightDirective };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_style_url.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_style_url.snap
index f4deebe5f..2b6ad2aed 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_style_url.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_style_url.snap
@@ -1,17 +1,15 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6126
 expression: result.code
 ---
-import { Component } from '@angular/core';
+import { Component } from "@angular/core";
 import { __decorate } from "tslib";
 import __NG_CLI_RESOURCE__0 from "angular:jit:style:file;./app.css";
-
 let AppComponent = class AppComponent {};
-AppComponent = __decorate([
-    Component({
-    selector: 'app-root',
-    template: '<h1>Hello</h1>',
-    styles: [__NG_CLI_RESOURCE__0],
-})
-], AppComponent);
+AppComponent = __decorate([Component({
+	selector: "app-root",
+	template: "<h1>Hello</h1>",
+	styles: [__NG_CLI_RESOURCE__0]
+})], AppComponent);
 export { AppComponent };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_template_url.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_template_url.snap
index e484ba5c7..36550eec9 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_template_url.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_template_url.snap
@@ -1,17 +1,15 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
+assertion_line: 6096
 expression: result.code
 ---
-import { Component } from '@angular/core';
+import { Component } from "@angular/core";
 import { __decorate } from "tslib";
 import __NG_CLI_RESOURCE__0 from "angular:jit:template:file;./app.html";
-
 let AppComponent = class AppComponent {};
-AppComponent = __decorate([
-    Component({
-    selector: 'app-root',
-    template: __NG_CLI_RESOURCE__0,
-    standalone: true,
-})
-], AppComponent);
+AppComponent = __decorate([Component({
+	selector: "app-root",
+	template: __NG_CLI_RESOURCE__0,
+	standalone: true
+})], AppComponent);
 export { AppComponent };
diff --git a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_union_type_ctor_params.snap b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_union_type_ctor_params.snap
index 7b1d8cc21..7a34b853c 100644
--- a/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_union_type_ctor_params.snap
+++ b/crates/oxc_angular_compiler/tests/snapshots/integration_test__jit_union_type_ctor_params.snap
@@ -1,29 +1,23 @@
 ---
 source: crates/oxc_angular_compiler/tests/integration_test.rs
-assertion_line: 6360
+assertion_line: 6406
 expression: result.code
 ---
-
-import { Component } from '@angular/core';
-import { ServiceA } from './a.service';
-import { ServiceB } from './b.service';
-import { ServiceC } from './c.service';
+import { Component } from "@angular/core";
+import { ServiceA } from "./a.service";
+import { ServiceB } from "./b.service";
+import { ServiceC } from "./c.service";
 import { __decorate } from "tslib";
-
 let TestComponent = class TestComponent {
-    constructor(
-        svcA: undefined | ServiceA,
-        svcB: null | undefined | ServiceB,
-        svcC: ServiceC | null,
-    ) {}
-
-static ctorParameters = () => [
-    { type: undefined },
-    { type: undefined },
-    { type: ServiceC }
-];
+	constructor(svcA, svcB, svcC) {}
+	static ctorParameters = () => [
+		{ type: undefined },
+		{ type: undefined },
+		{ type: ServiceC }
+	];
 };
-TestComponent = __decorate([
-    Component({ selector: 'test', template: '' })
-], TestComponent);
+TestComponent = __decorate([Component({
+	selector: "test",
+	template: ""
+})], TestComponent);
 export { TestComponent };