javaScriptCanOpenWindowsAutomatically Configuration in iOS 26 WebView

Hello,

I'm exploring the new SwiftUI WebView and WebPage APIs introduced in iOS 26, and I have a question about configuring JavaScript window opening behavior.

In our app, we currently use WKWebView with the javaScriptCanOpenWindowsAutomatically property set to true to support a specific use case. This property is part of WKPreferences and controls whether JavaScript can open windows without user interaction. According to the official documentation (WKPreferences.javaScriptCanOpenWindowsAutomatically), this property defaults to false on iOS and true on macOS.

With the new iOS 26 WebView and WebPage APIs, I haven't been able to find a way to configure this behavior. Looking through the available configuration options, there doesn't appear to be an equivalent setting. My questions are:

1. Has the default behavior changed for the new SwiftUI WebView? Does it now allow JavaScript to open windows automatically by default on iOS?
2. If not, is there a way to configure this behavior that I'm missing?
3. If this configuration is intentionally not exposed, what is the recommended approach for apps that need to enable automatic window opening?

Currently, we're wrapping WKWebView in a UIViewRepresentable to maintain this functionality, but we'd love to migrate to the native SwiftUI WebView later this year if possible.

Thank you for any guidance you can provide!