CSS选择器
- .class
- #id
- *
- element
- element,element
- element element
- element>element
- element+element
- [attribute]
- [attribute=value]
- [attribute~=value]
- [attribute|=value]
- :link
- :visited
- :active
- :hover
- :focus
- :first-letter
- :first-line
- :first-child
- :before
- :after
- :lang(language)
- element1~element2
- [attribute^=value]
- [attribute$=value]
- [attribute*=value]
- :first-of-type
- :last-of-type
- :only-of-type
- :only-child
- :nth-child(n)
- :nth-last-child(n)
- :nth-of-type(n)
- :nth-last-of-type(n)
- :last-child
- :root
- :empty
- :target
- :enabled
- :disabled
- :checked
- :not(selector)
- ::selection