| <!DOCTYPE html> | |
| <script> | |
| self.addEventListener('message', function(e) { | |
| // Send paint-timing entries upon receiving a message. | |
| const paintEntries = performance.getEntriesByType('paint'); | |
| let entryContents = paintEntries.length + ''; | |
| for (let i = 0; i < paintEntries.length; i++) { | |
| const entry = paintEntries[i]; | |
| entryContents += ' ' + entry.entryType + ' ' + entry.name; | |
| } | |
| parent.postMessage(entryContents, '*'); | |
| }); | |
| </script> |