[webview_flutter_wkwebview] Only set limitsNavigationsToAppBoundDomains when it is set to true (#5137)

This changes the flag to only flag to only call the method if it sets it to `true`.

Fixes https://github.com/flutter/flutter/issues/136449

packages/webview_flutter/webview_flutter_wkwebview/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 3.9.2
+
+* Fixes error caused by calling `WKWebViewConfiguration.limitsNavigationsToAppBoundDomains` on
+  versions below 14.
+
 ## 3.9.1
 
 * Fixes bug where `WebkitWebViewController.getUserAgent` was incorrectly returning an empty String.

packages/webview_flutter/webview_flutter_wkwebview/lib/src/webkit_webview_controller.dart

@@ -70,8 +70,14 @@ class WebKitWebViewControllerCreationParams
       );
     }
     _configuration.setAllowsInlineMediaPlayback(allowsInlineMediaPlayback);
-    _configuration.setLimitsNavigationsToAppBoundDomains(
-        limitsNavigationsToAppBoundDomains);
+    // `WKWebViewConfiguration.limitsNavigationsToAppBoundDomains` is only
+    // supported on iOS versions 14+. So this only calls it if the value is set
+    // to true.
+    if (limitsNavigationsToAppBoundDomains) {
+      _configuration.setLimitsNavigationsToAppBoundDomains(
+        limitsNavigationsToAppBoundDomains,
+      );
+    }
   }
 
   /// Constructs a [WebKitWebViewControllerCreationParams] using a

packages/webview_flutter/webview_flutter_wkwebview/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter_wkwebview
 description: A Flutter plugin that provides a WebView widget based on Apple's WKWebView control.
 repository: https://github.com/flutter/packages/tree/main/packages/webview_flutter/webview_flutter_wkwebview
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 3.9.1
+version: 3.9.2
 
 environment:
   sdk: ">=2.19.0 <4.0.0"

packages/webview_flutter/webview_flutter_wkwebview/test/webkit_webview_controller_test.dart

@@ -160,6 +160,25 @@ void main() {
         );
       });
 
+      test(
+          'limitsNavigationsToAppBoundDomains is not called if it uses default value (false)',
+          () {
+        final MockWKWebViewConfiguration mockConfiguration =
+            MockWKWebViewConfiguration();
+
+        WebKitWebViewControllerCreationParams(
+          webKitProxy: WebKitProxy(
+            createWebViewConfiguration: ({InstanceManager? instanceManager}) {
+              return mockConfiguration;
+            },
+          ),
+        );
+
+        verifyNever(
+          mockConfiguration.setLimitsNavigationsToAppBoundDomains(any),
+        );
+      });
+
       test('mediaTypesRequiringUserAction', () {
         final MockWKWebViewConfiguration mockConfiguration =
             MockWKWebViewConfiguration();