| <style> | |
| .c { background-color: red; color: yellow; } | |
| .t { background-color: inherit } | |
| .fastpath-mutation { background-color: green; color: blue; } | |
| </style> | |
| <div id=c class=c><div id=t class=t>Text</div></div> | |
| <script> | |
| document.body.offsetLeft; | |
| c.classList.add("fastpath-mutation"); | |
| </script> |