sveltejs · manuel3108 · Oct 30, 2025 · Oct 28, 2025
diff --git a/.changeset/nervous-gifts-complain.md b/.changeset/nervous-gifts-complain.md
@@ -0,0 +1,5 @@
+---
+'esrap': patch
+---
+
+fix: support typescript class decorator
diff --git a/src/languages/ts/index.js b/src/languages/ts/index.js
@@ -501,6 +501,12 @@ export default (options = {}) => {
 		 * @param {Context} context
 		 */
 		'ClassDeclaration|ClassExpression': (node, context) => {
+			if (node.decorators) {
+				for (const decorator of node.decorators) {
+					context.visit(decorator);
+				}
+			}
+
 			if (node.declare) {
 				context.write('declare ');
 			}

diff --git a/test/samples/ts-decorators-class/expected.ts b/test/samples/ts-decorators-class/expected.ts
@@ -0,0 +1,11 @@
+class Entity {
+	constructor(
+		private readonly name: string,
+		private readonly info: boolean
+	) {}
+}
+
+@Entity('users', { info: true })
+class User {}
+
+const u = new User(); // will print "random uuid..."
diff --git a/test/samples/ts-decorators-class/expected.ts.map b/test/samples/ts-decorators-class/expected.ts.map
@@ -0,0 +1,11 @@
+{
+  "version": 3,
+  "names": [],
+  "sources": [
+    "input.js"
+  ],
+  "sourcesContent": [
+    "class Entity {\n\tconstructor(\n\t\tprivate readonly name: string,\n\t\tprivate readonly info: boolean\n\t) {}\n}\n\n@Entity('users', { info: true })\nclass User {}\n\nconst u = new User(); // will print \"random uuid...\"\n"
+  ],
+  "mappings": "MAAM,MAAM,CAAC,CAAC;CACb,WAAW;mBACO,IAAY,EAAN,MAAM;mBACZ,IAAa,EAAP,OAAO;GAC7B,CAAC,AAAA,CAAC;AACL,CAAC;;CAEA,MAAM,CAAC,OAAO,IAAI,IAAI,EAAE,IAAI;MACvB,IAAI,CAAC,CAAC,AAAA,CAAC;;MAEP,CAAC,OAAO,IAAI"
+}
diff --git a/test/samples/ts-decorators-class/input.ts b/test/samples/ts-decorators-class/input.ts
@@ -0,0 +1,11 @@
+class Entity {
+	constructor(
+		private readonly name: string,
+		private readonly info: boolean
+	) {}
+}
+
+@Entity('users', { info: true })
+class User {}
+
+const u = new User(); // will print "random uuid..."