[title] {}
[title=foo] {}
[title="foo"] {}
[lang~="en-us"] {}
[lang|="zh"] {}
[href^="#"] {}
[href$=".org"] {}
[href*="example"] {}
[href*="insensitive" i] {}
[href*="insensitive" I] {}
[href*="cAsE" s] {}
[href*="cAsE" S] {}
[foo|att=val] {}
[*|att] {}
[|att] {}
[att] {}
a[ class = "test" ] {}
a[   class   =   "test"   ] {}
[href*="insensitive"   i] {}
[   href   ] {}