$("tr:eq(2)") won't work but $("tr").eq(2) does

[tekny]

The problem is :eq, :gt, :lt selectors are not working. They just return empty result.

[fb55]

That's because :eq and friends aren't implemented. I'm wondering why you're getting results at all, as using them should throw a SyntaxError.

[reezer]

Could they be supported? Sizzle does. The same is true for jQuery, etc.

[fb55]

CSSselect applies selectors right-to-left, Sizzle left-to-right. RTL
comes with a nice performance benefit, as it's always O(n), while
Sizzle is O(n^m) (m being the level of child selectors).

There are some features that CSSselect therefore can't support, eg.
:eq (as that applies to matches on the left side) and child
selector-first queries.

[ralyodio]

if you can't support the jQuery api, then don't claim to support it at all.

[fb55]

Cheerio supports jQuery's core API. There are some parts that won't be supported due to practical reasons (animations), the rest is added as needed. Some weird parts won't be supported, unless someone makes a convincing case for them (& pull requests help, too).

[awvalenti]

Can't cheerio convert $('element:eq(1)') internally to work the same as $('element').eq(1)?

[watson]

@awvalenti I've just build a module that does just that, though it doesn't hook into cheerio but you can use it along side cheerio: https://github.com/watson/cheerio-eq

Currently it only fixes :eq(), but it would be trivial to add support for other selectors (though in that case I would have to rename the module ;)

Let me know what you think and please open pull requests or issues if you have any suggestions/comments/bugs/feedback :)