| OLD | NEW |
| (Empty) |
| 1 | |
| 2 :root:first-child { background-color: red; } | |
| 3 :root:last-child { background-color: red; } | |
| 4 :root:only-child { background-color: red; } | |
| 5 :root:nth-child(1) { background-color: red; } | |
| 6 :root:nth-child(n) { background-color: red; } | |
| 7 :root:nth-last-child(1) { background-color: red; } | |
| 8 :root:nth-last-child(n) { background-color: red; } | |
| 9 :root:first-of-type { background-color: red; } | |
| 10 :root:last-of-type { background-color: red; } | |
| 11 :root:only-of-type { background-color: red; } | |
| 12 :root:nth-of-type(1) { background-color: red; } | |
| 13 :root:nth-of-type(n) { background-color: red; } | |
| 14 :root:nth-last-of-type(1) { background-color: red; } | |
| 15 :root:nth-last-of-type(n) { background-color: red; } | |
| 16 p { color: green; } | |
| OLD | NEW |