- iOS 8.0+
- macOS 10.10+
The web view invoking the delegate method.
The message to be displayed.
The completion handler to call after the confirm panel has been dismissed. Pass
trueif the user chose OK, and pass
falseif the user chose Cancel.
For user security, implementations of this method should call attention to the fact that a specific website controls the content in this panel. A simple formula for identifying the controlling website is
frame. The panel should have two buttons, typically OK and Cancel.