| <!DOCTYPE html> |
| <html> |
| <style> |
| body { |
| margin: 0; |
| } |
| table { |
| border-collapse: collapse; |
| padding: 4px; |
| } |
| tr { |
| background: red; |
| } |
| td { |
| width: 260px; |
| height: 50px; |
| padding: 0; |
| } |
| </style> |
| <script> |
| function repaintTest() { |
| const output = document.getElementById("repaintRects"); |
| |
| if (!window.testRunner) { |
| alert("This test requires testRunner to run!"); |
| return; |
| } |
| |
| if (!window.internals) { |
| alert("This test requires window.interals to run!"); |
| return; |
| } |
| |
| window.internals.startTrackingRepaints(); |
| window.testRunner.dumpAsText(); |
| |
| const row = document.querySelector("tr"); |
| row.style.background = "green"; |
| |
| // Force layout for repainting. |
| row.offsetTop; |
| |
| const repaintRects = window.internals.repaintRectsAsText(); |
| window.internals.stopTrackingRepaints(); |
| |
| output.textContent = repaintRects; |
| } |
| |
| window.onload = repaintTest; |
| </script> |
| <body> |
| <table> |
| <tr> |
| <td></td> |
| </tr> |
| </table> |
| <pre id="repaintRects"></pre> |
| </body> |
| </html> |
