Window.postMessage() throws a SyntaxError

HtmlUnit · Feb 2, 2025 · 1cf107e · 1cf107e
1 parent 889f24e
commit 1cf107e
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 4 deletions.
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
@@ -8,6 +8,9 @@
 
     <body>
         <release version="4.10.0" date="February xx, 2025" description="Bugfixes">
+            <action type="fix" dev="rbri">
+                Window.postMessage() throws a SyntaxError.
+            </action>
             <action type="fix" dev="rbri">
                 Window.atob()/btoa() throws an InvalidCharacterError.
             </action>

diff --git a/src/main/java/org/htmlunit/javascript/host/Window.java b/src/main/java/org/htmlunit/javascript/host/Window.java
@@ -1983,10 +1983,9 @@ public static void postMessage(final Context context, final Scriptable scope,
                     targetURL = new URL(targetOrigin);
                 }
                 catch (final Exception e) {
-                    throw JavaScriptEngine.throwAsScriptRuntimeEx(
-                            new Exception(
-                                    "SyntaxError: Failed to execute 'postMessage' on 'Window': Invalid target origin '"
-                                            + targetOrigin + "' was specified (reason: " + e.getMessage() + "."));
+                    throw JavaScriptEngine.syntaxError(
+                            "Failed to execute 'postMessage' on 'Window': Invalid target origin '"
+                                    + targetOrigin + "' was specified (reason: " + e.getMessage() + ".");
                 }
             }