| <!DOCTYPE html> | |
| <script> | |
| var popups = 0; | |
| window.addEventListener('message', function(a) { | |
| if (a.data == 1) { | |
| let popup = !!window.open(); | |
| popups += popup ? 1 : 0; | |
| } else { | |
| window.domAutomationController.send(popups); | |
| } | |
| }); | |
| // Tries to open two popups and reports how many successfully opened. | |
| function openPopupsAndReport() { | |
| window.postMessage(1, document.location); | |
| window.postMessage(1, document.location); | |
| window.postMessage(2, document.location); | |
| } | |
| </script> |