[fix] fix analysis

lib/src/_web_socket_connect/_web_socket_connect_html.dart

@@ -3,14 +3,27 @@ import 'dart:js_interop';
 
 import 'package:web/helpers.dart';
 
-// TODO: remove when https://github.com/dart-lang/web/commit/4cb5811ed06
+// TODO(mytja): remove when https://github.com/dart-lang/web/commit/4cb5811ed06
 // is in a published release and the min constraint on pkg:web is updated
+/// [WebSocketEvents] is an extension to the main [WebSocket] class from
+/// package:web. It adds appropriate streams while https://github.com/dart-lang/web/commit/4cb5811ed06
+/// is not yet published.
 extension WebSocketEvents on WebSocket {
+  /// [onOpen] is a [Stream], which returns [Event]s upon
+  /// establishing new WebSocket connection.
   Stream<Event> get onOpen => EventStreamProviders.openEvent.forTarget(this);
+
+  /// [onMessage] is a [Stream], which returns [MessageEvent]s upon
+  /// receiving messages through the WebSocket connection.
   Stream<MessageEvent> get onMessage =>
       EventStreamProviders.messageEvent.forTarget(this);
+
+  /// [onClose] is a [Stream], which returns [CloseEvent]s upon
+  /// WebSocket closure.
   Stream<CloseEvent> get onClose =>
       EventStreamProviders.closeEvent.forTarget(this);
+
+  /// [onError] is a [Stream], which returns [Event]s upon error.
   Stream<Event> get onError =>
       EventStreamProviders.errorEventSourceEvent.forTarget(this);
 }