onRunAsModal   
  fun onRunAsModal(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: () -> Unit): <Error class: unknown class>(source)
Emitted after #WebKitWebView::ready-to-show on the newly created #WebKitWebView when JavaScript code calls 
Parameters
connectFlags 
a combination of ConnectFlags
handler
the Callback to connect