diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89f7bc10cdbc..75607d96a787 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -241,6 +241,16 @@ AOT snapshot can be used as follows to run DDC <dart-sdk>/bin/dartaotruntime
   Users should migrate to using `dart:js_interop` and `package:web`. See
   [#59716][].
 
+#### `dart:js`
+
+- `dart:js` is marked deprecated and will be removed in an upcoming release.
+  Users should migrate to using `dart:js_interop`. See [#59716][].
+
+#### `dart:js_util`
+
+- `dart:js_util` is marked deprecated and will be removed in an upcoming
+  release. Users should migrate to using `dart:js_interop`. See [#59716][].
+
 [#59716]: https://github.com/dart-lang/sdk/issues/59716
 
 ## 3.6.0
diff --git a/sdk/lib/js/js.dart b/sdk/lib/js/js.dart
index 760ba7035c96..70fce9731c74 100644
--- a/sdk/lib/js/js.dart
+++ b/sdk/lib/js/js.dart
@@ -84,6 +84,7 @@
 ///     var jsArray = JsObject.jsify([1, 2, 3]);
 ///
 /// {@category Web (Legacy)}
+@Deprecated('Use dart:js_interop instead.')
 library dart.js;
 
 import 'dart:collection' show ListMixin;
diff --git a/sdk/lib/js_util/js_util.dart b/sdk/lib/js_util/js_util.dart
index caa1ad2fefec..3d73e10fd275 100644
--- a/sdk/lib/js_util/js_util.dart
+++ b/sdk/lib/js_util/js_util.dart
@@ -14,6 +14,7 @@
 /// with `@JS()` annotations.
 ///
 /// {@category Web (Legacy)}
+@Deprecated('Use dart:js_interop instead.')
 library dart.js_util;
 
 // Examples can assume:
@@ -148,7 +149,16 @@ class NullRejectionException implements Exception {
 
 /// Converts a JavaScript Promise to a Dart [Future].
 ///
-/// ```dart template:top
+/// ```dart
+/// // ignore: deprecated_member_use_from_same_package
+/// import 'dart:js_util';
+///
+/// // ignore: deprecated_member_use_from_same_package
+/// import 'package:js/js.dart';
+///
+/// @JS()
+/// class Promise<T> {}
+///
 /// @JS()
 /// external Promise<num> get threePromise; // Resolves to 3
 ///