What is the difference between css1 and css2?

Answer 1

CSS2 provides more powerful ways to associate styles with tags.

• "*" matches any tag. e.g. * {color:red}.

• A "greater than" sign ">" can be used to specify parent-child relationship. e.g. AAA > CCC > DDD {color:red} matches tag DDD whose parent is CCC whose parent is AAA.

• Space can be used to specify that a tag must have other tags as its ancestor. For example: AAA CCC DDD {color:blue} matches DDD that has CCC as its ancestor somewhere, which has AAA in its ancestor somewhere.

• "+" can be used to specify some restriction on same level tags. For example: AAA + BBB {color:red} matchs BBB only if it has a older sibling AAA.

• ":first-child" can be used to match a tag only if it is the first child. e.g. BBB:first-child {color:red} matches only if BBB is a first child.

• The following can be used for the anchor tag and certain other tags:

Answer 2

CSS2 introduced new features and improvements over CSS1, such as positioning, z-index, media types, and bidirectional text support. It also included support for web fonts, downloadable fonts, and more precise control over font styles. Additionally, CSS2 provided better support for tables and forms, as well as improved ways to handle backgrounds and borders.