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This article introduces the relevant knowledge of "what are the selectors of Css3". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In css, a selector is a pattern for selecting elements that need to be styled

Css selectors can be divided into the following categories:

1. Id selector # box {}

two。 Class selector .box {}

3. Tag selector a {} and a, H2, p {}

4. Adjacent selector h _ 2selecp {}

5. Subselector ul > li {}

6. Descendant selector li a {}

7. Wildcard selectors * {} and * a {}

8. Property selector a [rel= "external"] {}

9. Pseudo class selector a:hover {}

The pseudo-class selector in CSS3 is as follows:

State pseudo class selector

1:link

2:visited

3:hover

4:active

5:focus

6:lang

7:target

Structural pseudo-class selector

1:first-letter

2:first-line

3:before

4:after

5:root ()

6:not ()

7:empty ()

8:target ()

9:first-child ()

10:nth-child ()

11:nth-last-child ()

12:nth-of-type (n)

13:only-child

14:first-letter

15:first-line

16:before

17:after

18:selection

UI status element pseudo-class selector

E:checked {attribute} matches all selected elements in the user interface (form form)

E:enabled {attribute} matches all available elements in the user interface (form form)

E:disabled {attribute} matches all elements in the user interface (form form) that are not available

E::selection {attribute} matches the part of the element that is selected or highlighted by the user

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