WebKit2.Settings.allow_modal_dialogs

Settings.allow_modal_dialogs: Boolean (Read / Write / Construct)
  

Determine whether it's allowed to create and run modal dialogs from a WebKit2.WebView through JavaScript with <function>window.showModalDialog</function>. If it's set to false, the associated WebKit2.WebView won't be able to create new modal dialogs, so not even the WebKit2.WebView::create signal will be emitted.