| <!DOCTYPE html> |
| <body> |
| <script> |
| (async () => { |
| const sxg_path = 'sxg/sxg-subresource.sxg'; |
| const scipt_sxg_path = 'sxg/sxg-subresource-script.sxg'; |
| const scipt_path = 'sxg-subresource-script.js'; |
| const wait_for_prefetch = new Promise((resolve) => { |
| new PerformanceObserver((list) => { |
| for (let e of list.getEntries()) { |
| if (e.name.endsWith(scipt_sxg_path)) { |
| resolve(); |
| } else if (e.name.endsWith(scipt_path)) { |
| window.parent.postMessage( |
| scipt_path + ' should not be prefetched', '*'); |
| } |
| } |
| }).observe({ entryTypes: ['resource'] }); |
| }); |
| |
| const link = document.createElement('link'); |
| link.rel = 'prefetch'; |
| link.href = sxg_path; |
| document.body.appendChild(link); |
| await wait_for_prefetch; |
| location.href = sxg_path; |
| })() |
| </script> |
| </body> |