[Bug 12299] The (normative and non-normative) assertion that tokenlist.item(index) / tokenlist[index] returns null for index>=length appears to be in conflict with WebIDL, at least for the index property case; afaict WebIDL requires that index property getters throw

http://www.w3.org/Bugs/Public/show_bug.cgi?id=12299

Boris Zbarsky <bzbarsky@mit.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |bzbarsky@mit.edu

--- Comment #2 from Boris Zbarsky <bzbarsky@mit.edu> 2011-03-14 12:28:50 UTC ---
[index] needs to return undefined when out of range.

.item(index) can do whatever it wants to.

That's how nodelists already behave: .item() returns null, while [index]
returns undefined.

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