Negative eq() in IE does not return null

[Motty]

I found a problem in older IE browsers (pre-IE9) where using a ":eq(n)" selector, where "n" is negative, returns ":eq(0)". This occurs in all jQuery versions except 1.2.6.

Here is a ​demo of the problem

[Motty]

Oh, I also found that using ".eq(-1)" also messes up, so far, in IE, Firefox and Chrome. I haven't tested the other browsers.

​Updated demo

* IGNORE THIS, THIS WORKS AS INTENDED! *

[Rick Waldron]

A simpler reduction: ​http://jsfiddle.net/rwaldron/TuRNp/3/

Can someone with appropriate browsers test this?

Also, just in case it wasn't clear, if you have one element, 0 is the same as -1

[Motty]

In the simpler reduction demo, this also returns true:

$test.eq(null).length === 1 // true

• IGNORE THIS, IT WORKS AS INTENDED! *

[Rick Waldron]

Thanks for the clarification, much appreciated.

According to the api docs, eq() accepts only integers: ​http://api.jquery.com/eq

[Motty]

Hiya.. sorry, I need to clarify. I shouldn't have added in the ".eq()" examples as I forgot about how it treats negative integers. But ​:eq() acts completely different and does not work with negative integers!

If I use ":eq(n)" in modern browsers, negative integers return null

$test.filter(':eq(-1)') // returns null

In IE8 and older, it returns the element ':eq(0)'.

$test.filter(':eq(-1)') // returns $test.filter(':eq(0)')

Here is a ​test example to clarify... run it in IE