:eq return different object in 1.10.1

[htpu]

For the following html dom:

<div id="container">
    <div id="a"><div id="b"></div></div>
    <div id="c"><div id="d"></div></div>
</div>

the following JS code:

$("#container > * :eq(1)")

returns div.#c in jquery 1.9.x but returns div.#d in jquery 1.10.1

[dmethvin]

So which result do you like best? I have a preference for what 1.10 returns.

[[email protected]…]

Replying to dmethvin:

So which result do you like best? I have a preference for what 1.10 returns.

After carefully testing, I found it's a bug in 1.10.1

Two selectors returns different result '#container > *:eq(1)' returns: c '#container > * :eq(1)' returns: d Note the only difference is that in the 2nd selector there is a space between "*" and ":eq" But the two selectors return the same result, c, in 1.9.1, which is the correct behavior

Please test it at ​http://jsfiddle.net/nVUpc/2/

[gibson042]

Replying to [email protected]…:

Two selectors returns different result '#container > *:eq(1)' returns: c '#container > * :eq(1)' returns: d Note the only difference is that in the 2nd selector there is a space between "*" and ":eq" But the two selectors return the same result, c, in 1.9.1, which is the correct behavior

The space between "*" and ":eq(1)" is not meaningless; it is a ​descendant combinator:

• "#container > *:eq(1)" matches the second element child of #container.
• "#container > * :eq(1)" matches the second element in the list of all descendants of element children of #container (equivalent to "#container > * *:eq(1)").

1.10.1 implements the correct behavior in ​http://jsfiddle.net/nVUpc/2/.

[[email protected]…]

Replying to gibson042:

Replying to [email protected]…:

Two selectors returns different result '#container > *:eq(1)' returns: c '#container > * :eq(1)' returns: d Note the only difference is that in the 2nd selector there is a space between "*" and ":eq" But the two selectors return the same result, c, in 1.9.1, which is the correct behavior

The space between "*" and ":eq(1)" is not meaningless; it is a ​descendant combinator:

• "#container > *:eq(1)" matches the second element child of #container.
• "#container > * :eq(1)" matches the second element in the list of all descendants of element children of #container (equivalent to "#container > * *:eq(1)").

1.10.1 implements the correct behavior in ​http://jsfiddle.net/nVUpc/2/.

According to the document

A descendant combinator is whitespace that separates two sequences of simple selectors

Which are simple selectors? And which are not? Are "*" and ":eq" both simple selectors?
I think the prvious behavior is more reasonable since most developers would not care the space before ":eq" or ":last" or ":XXX"

[gibson042]

​http://www.w3.org/TR/css3-selectors/#descendant-combinators

Simple selectors are basically the "atoms" of selector expressions.

Edit: ​http://www.w3.org/TR/css3-selectors/#simple-selectors, rather