improved extension

packages/device_info_plus/device_info_plus/lib/src/device_info_plus_web.dart

@@ -29,7 +29,7 @@ class DeviceInfoPlusWebPlugin extends DeviceInfoPlatform {
           'appCodeName': _navigator.appCodeName,
           'appName': _navigator.appName,
           'appVersion': _navigator.appVersion,
-          'deviceMemory': _navigator.safeDeviceMemory(),
+          'deviceMemory': _navigator.safeDeviceMemory,
           'language': _navigator.language,
           'languages': _navigator.languages.toDart,
           'platform': _navigator.platform,
@@ -46,13 +46,15 @@ class DeviceInfoPlusWebPlugin extends DeviceInfoPlatform {
   }
 }
 
-// TODO: Remove when https://github.com/dart-lang/web/issues/326 is resolved
+/// Some Navigator properties are not fully supported in all browsers.
+/// However, package:web does not provide a safe way to access these properties,
+/// and assumes they are always not null.
+/// 
+/// This extension provides a safe way to access these properties.
+/// 
+/// See: https://github.com/dart-lang/web/issues/326
+///      https://github.com/fluttercommunity/plus_plugins/issues/3391
 extension SafeNavigationGetterExtensions on html.Navigator {
-  double? safeDeviceMemory() {
-    try {
-      return deviceMemory;
-    } catch (e) {
-      return null;
-    }
-  }
+  @JS('deviceMemory')
+  external double? get safeDeviceMemory;
 }