| <!DOCTYPE html> | |
| <link rel="help" href="https://crbug.com/1129563"> | |
| <body style="contain: size layout;"> | |
| <div id="target" style="contain: size layout;"></div> | |
| <div id="child"></div> | |
| </body> | |
| <script> | |
| document.body.offsetTop; | |
| const target = document.getElementById('target'); | |
| const child = document.getElementById('child'); | |
| target.appendChild(child); | |
| </script> |