This index lists all the supported Cascading Style Sheets (CSS) attributes by category, and indicates the version of Windows Internet Explorer in which the attributes were first available.
| Version Keys |
|---|
| (5) | Attribute available as of Microsoft Internet Explorer 5 |
| (5.5) | Attribute available as of Internet Explorer 5.5 |
| (6) | Attribute available as of Internet Explorer 6 |
| (7) | Attribute available as of Internet Explorer 7 |
| (8) | Attribute available as of Internet Explorer 8 |
Note When an attribute has multiple version keys, later version keys indicate significant updates to the attribute.
— Attributes that have been proposed to the World Wide Web Consortium (W3C) but are not part of any standard.
— Microsoft extensions to the CSS standard.
Pseudo-classes and Others
See also the "Selector Support by Version" table in Understanding CSS Selectors.