better platform check

lib/src/support/platform.dart

@@ -0,0 +1,15 @@
+import 'platform/io.dart' if (dart.library.html) 'platform/web.dart';
+
+// Returns the current platform which works for both web and devices.
+PlatformType lkPlatform() => lkPlatformImplementation();
+bool lkPlatformIs(PlatformType type) => lkPlatform() == type;
+
+enum PlatformType {
+  web,
+  windows,
+  linux,
+  macOS,
+  android,
+  fuchsia,
+  iOS,
+}

lib/src/support/platform/io.dart

@@ -0,0 +1,11 @@
+import '../platform.dart';
+import 'dart:io';
+
+PlatformType lkPlatformImplementation() {
+  if (Platform.isWindows) return PlatformType.windows;
+  if (Platform.isFuchsia) return PlatformType.fuchsia;
+  if (Platform.isMacOS) return PlatformType.macOS;
+  if (Platform.isLinux) return PlatformType.linux;
+  if (Platform.isIOS) return PlatformType.iOS;
+  return PlatformType.android;
+}

lib/src/support/platform/web.dart

@@ -0,0 +1,3 @@
+import '../platform.dart';
+
+PlatformType lkPlatformImplementation() => PlatformType.web;

lib/src/support/websocket.dart

@@ -1,4 +1,4 @@
-import 'platforms/io.dart' if (dart.library.html) 'platforms/web.dart';
+import 'websocket/io.dart' if (dart.library.html) 'websocket/web.dart';
 
 class WebSocketException implements Exception {
   final int code;