CSS3 Important Content Translation

the above is nonsense1.3 Not fully confirmed here, compared to CSS3 and CSS3 selectors, the differences include:

• Basic definition changes (selectors, selector groups, simple selectors, etc.), especially, as simple selectors in css2, are now being used as simple selector sequences, "simple selectors" as part of this sequence.
• Allows an optional namespace to be added on the element type selector, the universal selector, and the type selector.
• A new combo device.
• A new simple selector, including substrings that match the property selector, and a new pseudo-class
• New pseudo-classes, and for pseudo-classes:: Writing habits
• Syntax rewriting
• Integration selector, definition selector collection
• The selector is a CSS3 module and is declared separately. Can other claims be linked to this document?
• Claims have their own unique test components

1.4 Selector

format		css level
*	all elements	2
e	e-type selector	1
e[foo]	e, with foo attribute	2
e[foo= "Bar"]	e with foo attribute and value exactly equal to bar	2
e[foo~= "bar"]	e, with foo attribute, value is a series of separated by spaces, one of which is exactly equal to bar	2

E[foo^= "Bar"]	E, with the Foo attribute, whose value starts with bar	3
E[foo$= "Bar"]	E, with the Foo attribute, whose value ends at bar	3
E[foo*= "Bar"]	E, with the Foo attribute, whose value contains bar	3
E[foo|= "en"]	E, with the Foo attribute, whose value contains a series of-delimited words (starting from the left) and beginning with en (for example: lang Pseudo-class: Html:lang (fr-be), Html:lang (DE))	2
E:root	E, document root node	3
E:nth-child (N)	Nth child node of E	3
E:nth-last-child (N)	E from the last child to the bottom of the nth child node	3
E:nth-of-type (N)	The nth sibling of type E	3
E:nth-last-of-type (N)	E from the last child forward to the nth type of sibling node	3
E:first-child	The first child node of E	2
E:last-child	The last child node of E	3
E:first-of-type	The first brother of the type of E	3
E:last-of-type	The last sibling node of type E	3
E:only-child	E's only one child node	3
E:only-of-type	The only one sibling node of type E	3
E:empty	No child nodes (also including text nodes) of the E	3
E:link	E, as the anchor point of the hyperlink, whose target has not been accessed	1
e:visited	Or have been visited	1
E:active	E in the activation state of a user operation	The
E:hover
E:focus
E:target	E, as the target of a URI mentioned	3
E:lang (FR)	E in FR language (document language determines the current page in what languages)	2
E:enabled	Element e on the user interface, available or disabled	3
E:disabled
E:checked	Element e on the user interface, selected (e.g., Radio box, multi Box)	3
E::first-line	The first line of the formatted E	1

E::first-letter	The first letter of the formatted E	1
E::before	Create content before the E element	2
E::after	Create content after the E element	2
E.warning	An element with class warning E	1
E#myid	An element with an ID of myID E	1
E:not (s)	E, does not conform to the simple selector s	3
E F	E's descendants F	1
E > F	E's child F	2
E + F	f element, followed by E	2
E ~ F	f element, preceded by an E	3

3. Not sensitive to case? 4, a simple selector, may be type selector, universal selector, property selector, class selector, ID selector or pseudo-Class 6, with namespace CSS notation:

• ns| E in the NS namespace
• *| E in any (or none) namespace
• | E with no namespace
• E If there is no default namespace declaration, equivalent to *| E; otherwise equivalent to ns| E,ns as the default namespace

9. CSS calculation rules      *              0     tag     &NBS P    1     .class     10     id          100