diff --git a/pkgs/flutter_http_example/lib/main.dart b/pkgs/flutter_http_example/lib/main.dart
index 70f003c84c..406b9e6b71 100644
--- a/pkgs/flutter_http_example/lib/main.dart
+++ b/pkgs/flutter_http_example/lib/main.dart
@@ -11,7 +11,7 @@ import 'package:provider/provider.dart';
 
 import 'book.dart';
 import 'http_client_factory.dart'
-    if (dart.library.html) 'http_client_factory_web.dart' as http_factory;
+    if (dart.library.js_interop) 'http_client_factory_web.dart' as http_factory;
 
 void main() {
   // `runWithClient` is used to control which `package:http` `Client` is used
diff --git a/pkgs/http/lib/src/browser_client.dart b/pkgs/http/lib/src/browser_client.dart
index 10d8e0cdba..80db8b1291 100644
--- a/pkgs/http/lib/src/browser_client.dart
+++ b/pkgs/http/lib/src/browser_client.dart
@@ -26,8 +26,8 @@ BaseClient createClient() {
   return BrowserClient();
 }
 
-/// A `dart:html`-based HTTP client that runs in the browser and is backed by
-/// XMLHttpRequests.
+/// A `package:web`-based HTTP client that runs in the browser and is backed by
+/// [XMLHttpRequest].
 ///
 /// This client inherits some of the limitations of XMLHttpRequest. It ignores
 /// the [BaseRequest.contentLength], [BaseRequest.persistentConnection],
diff --git a/pkgs/http/lib/src/client.dart b/pkgs/http/lib/src/client.dart
index 85d933a85a..7429ca8824 100644
--- a/pkgs/http/lib/src/client.dart
+++ b/pkgs/http/lib/src/client.dart
@@ -37,7 +37,8 @@ abstract interface class Client {
   /// Creates a new platform appropriate client.
   ///
   /// Creates an `IOClient` if `dart:io` is available and a `BrowserClient` if
-  /// `dart:html` is available, otherwise it will throw an unsupported error.
+  /// `dart:js_interop` is available, otherwise it will throw an unsupported
+  /// error.
   factory Client() => zoneClient ?? createClient();
 
   /// Sends an HTTP HEAD request with the given headers to the given URL.
diff --git a/pkgs/http_client_conformance_tests/lib/src/close_tests.dart b/pkgs/http_client_conformance_tests/lib/src/close_tests.dart
index 040b338bf6..8194130bcc 100644
--- a/pkgs/http_client_conformance_tests/lib/src/close_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/close_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'request_body_server_vm.dart'
-    if (dart.library.html) 'request_body_server_web.dart';
+    if (dart.library.js_interop) 'request_body_server_web.dart';
 
 /// Tests that the [Client] correctly implements [Client.close].
 void testClose(Client Function() clientFactory) {
diff --git a/pkgs/http_client_conformance_tests/lib/src/compressed_response_body_tests.dart b/pkgs/http_client_conformance_tests/lib/src/compressed_response_body_tests.dart
index 3ce871bc21..2395aaf494 100644
--- a/pkgs/http_client_conformance_tests/lib/src/compressed_response_body_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/compressed_response_body_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'compressed_response_body_server_vm.dart'
-    if (dart.library.html) 'compressed_response_body_server_web.dart';
+    if (dart.library.js_interop) 'compressed_response_body_server_web.dart';
 
 /// Tests that the [Client] correctly implements HTTP responses with compressed
 /// bodies.
diff --git a/pkgs/http_client_conformance_tests/lib/src/isolate_test.dart b/pkgs/http_client_conformance_tests/lib/src/isolate_test.dart
index b4ac8b2393..6b296a2df0 100644
--- a/pkgs/http_client_conformance_tests/lib/src/isolate_test.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/isolate_test.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'dart:isolate' if (dart.library.html) 'dummy_isolate.dart';
+import 'dart:isolate' if (dart.library.js_interop) 'dummy_isolate.dart';
 
 import 'package:async/async.dart';
 import 'package:http/http.dart';
@@ -10,7 +10,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'request_body_server_vm.dart'
-    if (dart.library.html) 'request_body_server_web.dart';
+    if (dart.library.js_interop) 'request_body_server_web.dart';
 
 Future<void> _testPost(Client Function() clientFactory, String host) async {
   await Isolate.run(
diff --git a/pkgs/http_client_conformance_tests/lib/src/multiple_clients_tests.dart b/pkgs/http_client_conformance_tests/lib/src/multiple_clients_tests.dart
index be9c4d9722..8f8dc813a2 100644
--- a/pkgs/http_client_conformance_tests/lib/src/multiple_clients_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/multiple_clients_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'multiple_clients_server_vm.dart'
-    if (dart.library.html) 'multiple_clients_server_web.dart';
+    if (dart.library.js_interop) 'multiple_clients_server_web.dart';
 
 /// Tests that the [Client] works correctly if there are many used
 /// simultaneously.
diff --git a/pkgs/http_client_conformance_tests/lib/src/redirect_tests.dart b/pkgs/http_client_conformance_tests/lib/src/redirect_tests.dart
index e21a5c2d4a..600becc0fe 100644
--- a/pkgs/http_client_conformance_tests/lib/src/redirect_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/redirect_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'redirect_server_vm.dart'
-    if (dart.library.html) 'redirect_server_web.dart';
+    if (dart.library.js_interop) 'redirect_server_web.dart';
 
 /// Tests that the [Client] correctly implements HTTP redirect logic.
 ///
diff --git a/pkgs/http_client_conformance_tests/lib/src/request_body_streamed_tests.dart b/pkgs/http_client_conformance_tests/lib/src/request_body_streamed_tests.dart
index 560858dc3c..8c0c658e11 100644
--- a/pkgs/http_client_conformance_tests/lib/src/request_body_streamed_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/request_body_streamed_tests.dart
@@ -11,7 +11,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'request_body_streamed_server_vm.dart'
-    if (dart.library.html) 'request_body_streamed_server_web.dart';
+    if (dart.library.js_interop) 'request_body_streamed_server_web.dart';
 
 /// Tests that the [Client] correctly implements streamed request body
 /// uploading.
diff --git a/pkgs/http_client_conformance_tests/lib/src/request_body_tests.dart b/pkgs/http_client_conformance_tests/lib/src/request_body_tests.dart
index e211da5755..2f13fa7fd5 100644
--- a/pkgs/http_client_conformance_tests/lib/src/request_body_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/request_body_tests.dart
@@ -10,7 +10,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'request_body_server_vm.dart'
-    if (dart.library.html) 'request_body_server_web.dart';
+    if (dart.library.js_interop) 'request_body_server_web.dart';
 
 class _Plus2Decoder extends Converter<List<int>, String> {
   @override
diff --git a/pkgs/http_client_conformance_tests/lib/src/request_headers_tests.dart b/pkgs/http_client_conformance_tests/lib/src/request_headers_tests.dart
index 8adf98c9c7..a6943871a8 100644
--- a/pkgs/http_client_conformance_tests/lib/src/request_headers_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/request_headers_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'request_headers_server_vm.dart'
-    if (dart.library.html) 'request_headers_server_web.dart';
+    if (dart.library.js_interop) 'request_headers_server_web.dart';
 
 /// Tests that the [Client] correctly sends headers in the request.
 void testRequestHeaders(Client client) async {
diff --git a/pkgs/http_client_conformance_tests/lib/src/response_body_streamed_test.dart b/pkgs/http_client_conformance_tests/lib/src/response_body_streamed_test.dart
index 28686fa553..b8afa3deb1 100644
--- a/pkgs/http_client_conformance_tests/lib/src/response_body_streamed_test.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/response_body_streamed_test.dart
@@ -10,7 +10,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'response_body_streamed_server_vm.dart'
-    if (dart.library.html) 'response_body_streamed_server_web.dart';
+    if (dart.library.js_interop) 'response_body_streamed_server_web.dart';
 
 /// Tests that the [Client] correctly implements HTTP responses with bodies of
 /// unbounded size.
diff --git a/pkgs/http_client_conformance_tests/lib/src/response_body_tests.dart b/pkgs/http_client_conformance_tests/lib/src/response_body_tests.dart
index 91ee549736..ba833f4a1b 100644
--- a/pkgs/http_client_conformance_tests/lib/src/response_body_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/response_body_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'response_body_server_vm.dart'
-    if (dart.library.html) 'response_body_server_web.dart';
+    if (dart.library.js_interop) 'response_body_server_web.dart';
 
 /// Tests that the [Client] correctly implements HTTP responses with bodies.
 ///
diff --git a/pkgs/http_client_conformance_tests/lib/src/response_headers_tests.dart b/pkgs/http_client_conformance_tests/lib/src/response_headers_tests.dart
index 4f920428ae..6a3647b196 100644
--- a/pkgs/http_client_conformance_tests/lib/src/response_headers_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/response_headers_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'response_headers_server_vm.dart'
-    if (dart.library.html) 'response_headers_server_web.dart';
+    if (dart.library.js_interop) 'response_headers_server_web.dart';
 
 /// Tests that the [Client] correctly processes response headers.
 void testResponseHeaders(Client client) async {
diff --git a/pkgs/http_client_conformance_tests/lib/src/response_status_line_tests.dart b/pkgs/http_client_conformance_tests/lib/src/response_status_line_tests.dart
index b618fa099c..12fb29c13a 100644
--- a/pkgs/http_client_conformance_tests/lib/src/response_status_line_tests.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/response_status_line_tests.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'response_status_line_server_vm.dart'
-    if (dart.library.html) 'response_status_line_server_web.dart';
+    if (dart.library.js_interop) 'response_status_line_server_web.dart';
 
 /// Tests that the [Client] correctly processes the response status line (e.g.
 /// 'HTTP/1.1 200 OK\r\n').
diff --git a/pkgs/http_client_conformance_tests/lib/src/server_errors_test.dart b/pkgs/http_client_conformance_tests/lib/src/server_errors_test.dart
index 65de499e56..0e45bc59b9 100644
--- a/pkgs/http_client_conformance_tests/lib/src/server_errors_test.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/server_errors_test.dart
@@ -8,7 +8,7 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test/test.dart';
 
 import 'server_errors_server_vm.dart'
-    if (dart.library.html) 'server_errors_server_web.dart';
+    if (dart.library.js_interop) 'server_errors_server_web.dart';
 
 /// Tests that the [Client] correctly handles server errors.
 void testServerErrors(Client client, {bool redirectAlwaysAllowed = false}) {