| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <style> |
| 3 iframe { |
| 4 position:absolute; |
| 5 top: 0px; |
| 6 left: 0px; |
| 7 width: 160px; |
| 8 height: 100px; |
| 9 overflow-y: scroll; |
| 10 } |
| 11 </style> |
| 12 <iframe src="http://127.0.0.1:8080/intersection-observer/resources/nested-cross-
origin-subframe.html"></iframe> |
| 13 |
| 14 <script> |
| 15 var iframe = document.querySelector("iframe"); |
| 16 var port; |
| 17 var iframe_loaded = false; |
| 18 var start_message_queued = false; |
| 19 // This frame forwards messages bidirectionally between its parent frame and |
| 20 // its child frame. The initiating message comes from the parent, but it |
| 21 // needs to be held if the child frame is not yet finished loading. The |
| 22 // booleans above account for the different possible orderings of events. |
| 23 function handleMessage(event) { |
| 24 if (event.source == iframe.contentWindow) { |
| 25 port.postMessage(event.data, "*"); |
| 26 } else if (iframe_loaded){ |
| 27 port = event.source; |
| 28 iframe.contentWindow.postMessage(event.data, "*"); |
| 29 } else { |
| 30 port = event.source; |
| 31 start_message_queued = true; |
| 32 } |
| 33 } |
| 34 window.addEventListener("message", handleMessage); |
| 35 iframe.onload = function () { |
| 36 iframe_loaded = true; |
| 37 if (start_message_queued) { |
| 38 iframe.contentWindow.postMessage("", "*"); |
| 39 start_message_queued = false; |
| 40 } |
| 41 } |
| 42 </script> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2873083002:
Propagate viewport intersection across OOPIFs at the correct time (Closed)
