| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Testcase for bug 643706 of Mozilla</title> | |
| <script> | |
| function boom() { | |
| const iframe = document.querySelector("iframe"); | |
| const win = iframe.contentWindow; | |
| win.document.designMode = 'on'; | |
| iframe.style.content = "'m'"; | |
| win.document.removeChild(win.document.documentElement) | |
| } | |
| </script> | |
| </head> | |
| <body onload="boom();"><iframe srcdoc=""></iframe></body> | |
| </html> |