| <!DOCTYPE html> | |
| <style> | |
| iframe { | |
| width: 300px; | |
| height: 150px; | |
| border: none; | |
| } | |
| </style> | |
| <iframe src="http://{{domains[www2]}}:{{ports[http][0]}}/intersection-observer/resources/v2-subframe.html"></iframe> | |
| <script> | |
| window.addEventListener("message", event => { | |
| requestAnimationFrame(() => setTimeout(() => { | |
| document.querySelector('iframe').contentWindow.postMessage(event.data, "*"); | |
| })); | |
| }); | |
| </script> |