Browser compatibility of some type of css selectors

Question

I would like to know if where is any browsers that does not support this kind of select?

1) .class-1.class-2
2) #id-1.class-2
3) .class-1 > .class-2
4) .class-1 + .class-2
5) .class[foo="bar"]

I do not have so many different OS with different browsers...So don't know where can find these compatibility. So please give me a hand!

Answer 1

IE7 and newer, as well as all other browsers, support all your given selectors.

1. IE6 reads .class-1.class-2 as .class-2 (see here for a comparison)

2. IE6 parses #id-1.class-2 correctly

3. IE6 cannot read >, ignores entire rule completely

4. IE6 cannot read +, ignores entire rule completely

5. IE6 cannot read [foo="bar"], ignores entire rule completely

Answer 2

internet explorer 5 & 6 don't support >,+ and [attr] selector. More information at http://www.quirksmode.org/css/contents.html