Description of the CSS3 selector

CSS3 attribute Symbol selector:

<! DOCTYPE html>
CSS3 Structural pseudo-class selector root, not, empty, target:

<! DOCTYPE html>
CSS3 structural pseudo-class selectors first-line, First-letter, before, after:

<! DOCTYPE html>
 CSS3 Structural pseudo-class selectors first-child, Last-child, Nth-child (), Nth-last-child (): 
 
 

<! DOCTYPE html>
 CSS3 Structural pseudo-class selectors Nth-child (n) and Only-child: 
 
 

<! DOCTYPE html>
CSS3 Structural pseudo-class selector nth-of-type, Nth-last-of-type:

<! DOCTYPE html>
CSS3 selector Hover, focus, active, checked:

<! DOCTYPE html>
CSS3 selector enabled, disabled:

<! DOCTYPE html>
CSS3 Universal Sibling Element selector:

<! DOCTYPE html>