Bribge works

windows/ReactNativeWebView/ReactWebView.cpp

     ReactWebView::~ReactWebView()
     {
       if (m_messagingEnabled) {
-        //m_webBridge.MessagePostedEvent(m_message_token);
+        m_webBridge.MessagePostEvent(m_message_token);
       }
     }
 
             });
 
         if (m_messagingEnabled) {
-          auto tag = this->GetValue(winrt::FrameworkElement::TagProperty()).as<winrt::IPropertyValue>().GetInt64();
-          /*
-          m_webBridge = WebViewBridge::WebBridge(tag);
-          m_message_token = m_webBridge.MessagePostedEvent([this](hstring const& message) {
-            this->OnMessagePosted(message);
-          });
-          webView.AddWebAllowedObject(L"__REACT_WEB_VIEW_BRIDGE", m_webBridge);
-          */
-
           m_webBridge = WebBridge();
+          m_message_token = m_webBridge.MessagePostEvent([this](const auto&, hstring const& message)
+            {
+              this->OnMessagePosted(message);
+            });
           webView.AddWebAllowedObject(L"__REACT_WEB_VIEW_BRIDGE", m_webBridge);
         }
     }

windows/WebViewBridgeComponent/WebBridge.cpp

 
 namespace winrt::WebViewBridgeComponent::implementation
 {
-  
+  winrt::event_token WebBridge::MessagePostEvent(Windows::Foundation::EventHandler<winrt::hstring> const& handler)
+  {
+    return m_messageEvent.add(handler);
+  }
+
+  void WebBridge::MessagePostEvent(winrt::event_token const& token) noexcept
+  {
+    m_messageEvent.remove(token);
+  }
+
+  void WebBridge::PostMessage(winrt::hstring message)
+  {
+    m_messageEvent(*this, message);
+  }
+
 }

windows/WebViewBridgeComponent/WebBridge.h

 {
     struct WebBridge : WebBridgeT<WebBridge>
     {
+    public:  
       WebBridge() = default;
+      void PostMessage(winrt::hstring message);
+      winrt::event_token MessagePostEvent(Windows::Foundation::EventHandler<winrt::hstring> const& handler);
+      void MessagePostEvent(winrt::event_token const& token) noexcept;
+    private:
+      winrt::event<Windows::Foundation::EventHandler<winrt::hstring>> m_messageEvent;
     };
+
+    
 }
 
 namespace winrt::WebViewBridgeComponent::factory_implementation

windows/WebViewBridgeComponent/WebBridge.idl

     runtimeclass WebBridge
     {
         WebBridge();
+        void PostMessage(String message);
+        event Windows.Foundation.EventHandler<String> MessagePostEvent;
     }
 }

windows/WebViewBridgeComponent/WebViewBridgeComponent.vcxproj.filters

   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="pch.cpp" />
-    <ClCompile Include="Class.cpp" />
     <ClCompile Include="$(GeneratedFilesDir)module.g.cpp" />
   </ItemGroup>
   <ItemGroup>