Fixes #1855

2 files changed, 57 insertions, 5 deletions

diff --git a/src/js_parser.zig b/src/js_parser.zig
index c20300daa..ee54a892a 100644
--- a/src/js_parser.zig
+++ b/src/js_parser.zig
@@ -16935,12 +16935,13 @@ fn NewParser_(
         ) []Stmt {
             switch (stmtorexpr) {
                 .stmt => |stmt| {
-                    if (!stmt.data.s_class.class.has_decorators) {
-                        var stmts = p.allocator.alloc(Stmt, 1) catch unreachable;
-                        stmts[0] = stmt;
-                        return stmts;
+                    if (comptime !is_typescript_enabled) {
+                        if (!stmt.data.s_class.class.has_decorators) {
+                            var stmts = p.allocator.alloc(Stmt, 1) catch unreachable;
+                            stmts[0] = stmt;
+                            return stmts;
+                        }
                     }
-
                     var class = &stmt.data.s_class.class;
                     var constructor_function: ?*E.Function = null;
 
diff --git a/test/bun.js/transpiler.test.js b/test/bun.js/transpiler.test.js
index dcc7f397a..a51b49235 100644
--- a/test/bun.js/transpiler.test.js
+++ b/test/bun.js/transpiler.test.js
@@ -80,6 +80,57 @@ describe("Bun.Transpiler", () => {
       );
     });
 
+    it("class constructor", () => {
+      const fixtures = [
+        [
+          `class Test {
+            b: string;
+          
+            constructor(private a: string) {
+              this.b = a;
+            }
+          }`,
+
+          `
+class Test {
+  a;
+  b;
+  constructor(a) {
+    this.b = a;
+    this.a = a;
+  }
+}
+                  `.trim(),
+        ],
+        [
+          `class Test extends Bar {
+            b: string;
+          
+            constructor(private a: string) {
+              super();
+              this.b = a;
+            }
+          }`,
+
+          `
+class Test extends Bar {
+  a;
+  b;
+  constructor(a) {
+    super();
+    this.b = a;
+    this.a = a;
+  }
+}
+                  `.trim(),
+        ],
+      ];
+
+      for (const [code, out] of fixtures) {
+        expect(ts.parsed(code, false, false).trim()).toBe(out);
+      }
+    });
+
     it("import Foo = require('bar')", () => {
       ts.expectPrinted_(
         "import React = require('react')",