| <?php |
| header('Link: <http://127.0.0.1:8000/resources/square.png?large>; rel=preload; as=image; imagesrcset="http://127.0.0.1:8000/resources/square.png?small 150w, http://127.0.0.1:8000/resources/square.png?large 300w"; imagesizes="(min-width: 150px) and (max-width: 150px) 150px, 300px"', false); |
| ?> |
| <!DOCTYPE html> |
| <meta name="viewport" content="width=150"> |
| <script> |
| window.addEventListener("load", function() { |
| var entries = performance.getEntriesByType("resource"); |
| var smallLoaded = false; |
| for (var i = 0; i < entries.length; ++i) { |
| if (entries[i].name.indexOf("large") != -1) |
| window.opener.postMessage("largeloaded", "*"); |
| if (entries[i].name.indexOf("small") != -1) |
| smallLoaded = true; |
| } |
| if (smallLoaded) |
| window.opener.postMessage("success", "*") |
| window.opener.postMessage("smallnotloaded", "*"); |
| }); |
| </script> |
| <script src="../resources/slow-script.pl?delay=200"></script> |
| |
