Cascading Style Sheet Knowledge Base

CSS Syntax

Source

https://www.w3.org/Style/CSS/specs.en.html last updated 11Jul2016
https://www.w3.org/Style/CSS/current-work last updated 11Jul2016
https://www.w3.org/TR/CSS/ last updated 07Jul2016
https://www.w3.org/TR/REC-CSS1-961217(1996-12-17)last updated 11Jul2016
https://www.w3.org/TR/2008/REC-CSS1-20080411/ last updated 07Jul2016
https://www.w3.org/TR/1998/REC-CSS2-19980512/ last updated 13Jul2016
https://www.w3.org/TR/2008/REC-CSS2-20080411/ last updated 07Jul2016
https://www.w3.org/TR/2011/REC-CSS2-20110607/ rev 1 last updated 07Jul2016
Cascading Style Sheets Level 2 Revision 2 (CSS 2.2) Specification last updated 07Jul2016
Cascading Style Sheets Level 2 (CSS 2) Specification last updated 07Jul2016

Syntax

Sources: https://www.w3.org/TR/2011/REC-CSS2-20110607/syndata.html

Tokenization

Property NameDescriptionCSS LevelRefRemark ( 2.1 $~~last updated 21 Jan 2019~~) 2.1 $~~last updated 21 Jan 2019~~: 2.1 :~~last updated 21 Jan 2019~~; 2.1 ;~~last updated 21 Jan 2019~~[ 2.1 \[~~last updated 21 Jan 2019~~] 2.1 \]~~last updated 21 Jan 2019~~{ 2.1 \{~~last updated 21 Jan 2019~~} 2.1 \}~~last updated 21 Jan 2019~~ATKEYWORD 2.1 @{ident}~~last updated 21 Jan 2019~~BAD_COMMENT 2.1 {badcomment}~~last updated 21 Jan 2019~~BAD_STRING 2.1 {badstring}~~last updated 21 Jan 2019~~BAD_URI 2.1 {baduri}~~last updated 21 Jan 2019~~CDC 2.1 -->~~last updated 21 Jan 2019~~CDO 2.1 <!--~~last updated 21 Jan 2019~~COMMENT 2.1 \/\*[^*]*\*+([^/*][^*]*\*+)*\/~~last updated 21 Jan 2019~~DASHMATCH 2.1 |=~~last updated 21 Jan 2019~~DELIM 2.1 any other character not matched by the above rules, and neither a single nor a double quote~~last updated 21 Jan 2019~~DIMENSION 2.1 {num}{ident}~~last updated 21 Jan 2019~~FUNCTION 2.1 ident}$~~last updated 21 Jan 2019~~HASH 2.1 #{name}~~last updated 21 Jan 2019~~IDENT 2.1 {ident}~~last updated 21 Jan 2019~~INCLUDES 2.1 ~=~~last updated 21 Jan 2019~~NUMBER 2.1 {num}~~last updated 21 Jan 2019~~PERCENTAGE 2.1 {num}%~~last updated 21 Jan 2019~~S 2.1 [ \t\r\n\f]+~~last updated 21 Jan 2019~~STRING 2.1 {string}~~last updated 21 Jan 2019~~UNICODE-RANGE 2.1 u\+[0-9a-f?]{1,6}(-[0-9a-f]{1,6})?~~last updated 21 Jan 2019~~URI 2.1 url\({w}{string}{w}$ |url${w}([!#$%&*-\[\]-~]|{nonascii}|{escape})*{w}$~~last updated 21 Jan 2019~~

Macro

Property NameDescriptionCSS LevelRefRemark badcomment 2.1 {badcomment1}|{badcomment2}~~last updated 21 Jan 2019~~badcomment1 2.1 \/\*[^*]*\*+([^/*][^*]*\*+)*~~last updated 21 Jan 2019~~badcomment2 2.1 \/\*[^*]*(\*+[^/*][^*]*)*~~last updated 21 Jan 2019~~badstring 2.1 {badstring1}|{badstring2}~~last updated 21 Jan 2019~~badstring1 2.1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\\?~~last updated 21 Jan 2019~~badstring2 2.1 \'([^\n\r\f\\']|\\{nl}|{escape})*\\?~~last updated 21 Jan 2019~~baduri 2.1 {baduri1}|{baduri2}|{baduri3}~~last updated 21 Jan 2019~~baduri1 2.1 url\({w}([!#$%&*-~]|{nonascii}|{escape})*{w}~~last updated 21 Jan 2019~~baduri2 2.1 url\({w}{string}{w}~~last updated 21 Jan 2019~~baduri3 2.1 url\({w}{badstring}~~last updated 21 Jan 2019~~escape 2.1 {unicode}|\\[^\n\r\f0-9a-f]~~last updated 21 Jan 2019~~ident 2.1 [-]?{nmstart}{nmchar}*~~last updated 21 Jan 2019~~name 2.1 {nmchar}+~~last updated 21 Jan 2019~~nl 2.1 \n|\r\n|\r|\f~~last updated 21 Jan 2019~~nmchar 2.1 [_a-z0-9-]|{nonascii}|{escape}~~last updated 21 Jan 2019~~nmstart 2.1 [_a-z]|{nonascii}|{escape}~~last updated 21 Jan 2019~~nonascii 2.1 [^\0-\237]~~last updated 21 Jan 2019~~num 2.1 [0-9]+|[0-9]*\.[0-9]+~~last updated 21 Jan 2019~~string 2.1 {string1}|{string2}~~last updated 21 Jan 2019~~string1 2.1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\"~~last updated 21 Jan 2019~~string2 2.1 \'([^\n\r\f\\']|\\{nl}|{escape})*\'~~last updated 21 Jan 2019~~unicode 2.1 \\[0-9a-f]{1,6}(\r\n|[ \n\r\t\f])?~~last updated 21 Jan 2019~~w 2.1 [ \t\r\n\f]*~~last updated 21 Jan 2019~~

Core Syntax

Property NameDescriptionCSS LevelRefRemark any 2.1 [ IDENT | NUMBER | PERCENTAGE | DIMENSION | STRING | DELIM | URI | HASH | UNICODE-RANGE | INCLUDES | DASHMATCH | ':' | FUNCTION S* [any|unused]* ')' | '(' S* [any|unused]* ')' | '[' S* [any|unused]* ']' ] S*;~~last updated 21 Jan 2019~~at-rule 2.1 ATKEYWORD S* any* [ block | ';' S* ];~~last updated 21 Jan 2019~~block 2.1 '{' S* [ any | block | ATKEYWORD S* | ';' S* ]* '}' S*;~~last updated 21 Jan 2019~~declaration 2.1 property S* ':' S* value;~~last updated 21 Jan 2019~~property 2.1 IDENT;~~last updated 21 Jan 2019~~ruleset 2.1 selector? '{' S* declaration? [ ';' S* declaration? ]* '}' S*;~~last updated 21 Jan 2019~~selector 2.1 any+;~~last updated 21 Jan 2019~~statement 2.1 ruleset | at-rule;~~last updated 21 Jan 2019~~stylesheet 2.1 [ CDO | CDC | S | statement ]*;~~last updated 21 Jan 2019~~unused 2.1 block | ATKEYWORD S* | ';' S* | CDO S* | CDC S*;~~last updated 21 Jan 2019~~value 2.1 [ any | block | ATKEYWORD S* ]+;~~last updated 21 Jan 2019~~

Vendor-specific Extension

Property NameDescriptionCSS LevelRefRemark - 2.1 '-' + vendor identifier + '-' + meaningful name~~last updated 21 Jan 2019~~_ 2.1 '_' + vendor identifier + '-' + meaningful name~~last updated 21 Jan 2019~~

Historical Prefix Keyword

Property NameDescriptionCSS LevelRefRemark -ah- 2.1 Antenna House~~last updated 21 Jan 2019~~-atsc- 2.1 Advanced Television Standards Committee~~last updated 21 Jan 2019~~-hp- 2.1 Hewlett Packard~~last updated 21 Jan 2019~~-khtml- 2.1 KDE~~last updated 21 Jan 2019~~-moz- 2.1 Mozilla~~last updated 21 Jan 2019~~-ms- 2.1 Microsoft~~last updated 21 Jan 2019~~mso- 2.1 Microsoft~~last updated 21 Jan 2019~~-o- 2.1 Opera Software~~last updated 21 Jan 2019~~prince- 2.1 YesLogic~~last updated 21 Jan 2019~~-rim- 2.1 Research In Motion~~last updated 21 Jan 2019~~-ro- 2.1 Real Objects~~last updated 21 Jan 2019~~-wap- 2.1 The WAP Forum~~last updated 21 Jan 2019~~-webkit- 2.1 Apple~~last updated 21 Jan 2019~~-xv- 2.1 Opera Software~~last updated 21 Jan 2019~~

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