| Adjacent Sibling selector |
CSS 2 |
No |
Yes |
| Attribute and attribute selectors |
CSS 2 |
No |
Yes |
| Attribute selectors with namespace |
CSS 3 |
No |
Yes |
| Attribute start selector |
CSS 3 |
No |
Yes |
| Attribute end selector |
CSS 3 |
No |
Yes |
| Attribute contains selector |
CSS 3 |
No |
Yes |
| Child selector |
CSS 2 |
No |
Yes |
| Class selectors |
CSS 1 |
Yes |
Yes |
| Descendant selectors |
CSS 1 |
Yes |
Yes |
| ID selectors |
CSS 1 |
Yes |
Yes |
| Universal Selector |
CSS 2 |
Yes |
Yes |
| Type selectors |
CSS 1 |
Yes |
Yes |
| Type selectors with namespace |
CSS 3 |
Yes |
Yes |
| Negation pseudo-class :not() |
CSS 3 |
No |
No |
| :active |
CSS 1/2 |
Optional |
Yes |
| ::after, :after |
CSS 2 |
No |
Yes |
| ::before, :before |
CSS 2 |
No |
Yes |
| :checked |
CSS 3 |
No |
Yes |
| :disabled |
CSS 3 |
No |
Yes |
| :empty |
CSS 3 |
No |
Yes |
| :enabled |
CSS 3 |
No |
Yes |
| :first-child |
CSS 2 |
No |
Yes |
| ::first-letter, :first-letter |
CSS 1 |
No |
Yes |
| ::first-line, :first-line |
CSS 1 |
No |
Yes |
| :first-of-type |
CSS 3 |
No |
No |
| :focus |
CSS 2 |
Optional |
Yes |
| :hover |
CSS 2 |
No |
Yes |
| :lang() |
CSS 2 |
No |
Yes |
| :link |
CSS 1/2 |
Optional |
Yes |
| :last-child |
CSS 3 |
No |
No |
| :last-of-type |
CSS 3 |
No |
No |
| :nth-child() |
CSS 3 |
No |
No |
| :nth-last-child() |
CSS 3 |
No |
No |
| :nth-of-type() |
CSS 3 |
No |
No |
| :nth-last-of-type() |
CSS 3 |
No |
No |
| :only-child |
CSS 3 |
No |
No |
| :only-of-type |
CSS 3 |
No |
No |
| :root |
CSS 3 |
No |
No |
| ::selection |
CSS 3 |
No |
No |
| :target |
CSS 3 |
No |
No |
| :visited |
CSS 1/2 |
Optional |
Yes |
