| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script> | |
| var newWindow = window.open("about:blank"); | |
| newWindow.alert("Testing alert"); | |
| newWindow.confirm("Testing confirm"); | |
| newWindow.prompt("Testing prompt", "Default text"); | |
| newWindow.onbeforeunload = () => "Default text"; | |
| </script> | |
| </head> | |
| </html> |