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[Bug 12296] Rules for parsing an integer don't match ES parseInt()

From: <bugzilla@jessica.w3.org>
Date: Thu, 05 May 2011 20:57:57 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QI5cT-0006f0-GF@jessica.w3.org>

Ian 'Hixie' Hickson <ian@hixie.ch> changed:

           What    |Removed                     |Added
             Status|REOPENED                    |RESOLVED
                 CC|                            |ian@hixie.ch
         Resolution|                            |WONTFIX

--- Comment #5 from Ian 'Hixie' Hickson <ian@hixie.ch> 2011-05-05 20:57:56 UTC ---
This is intended to match legacy attribute parsing. It's apparently not
perfect, and I'm happy to address specific compatibility problems, but
referring to ES' parseInt() here is a non-starter. For example, consider:

   <ol><li value="0x20">1

Firefox, Opera, and WebKit all get different results, but none of them match
ES. (WebKit and IE agree on this case, but that's because they clamp to 1
rather than 0 like the other browsers. Note that the spec here has removed
clamping to allow negative numbers, but that's another issue.)

Or consider:


Again, Firefox, Opera, and WebKit all get different results. The spec matches
WebKit/IE for this one. ES doesn't match any of them.

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Status: Rejected
Change Description: no spec change

Regarding U+00A0 (NBSP), it's one of a number of areas where browsers happen to
coincide and not match the spec, but overall the interoperability is pretty
poor. Unless there are specific compatibility problems, I would much rather we
keep the spec at the current pretty simple level rather than adding additional
complexity to handle specific non-conforming cases that happen to be
interoperable today.

Here's a test case that shows some of the weird behaviour in how characters are
handled before the number:

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Received on Thursday, 5 May 2011 20:57:59 UTC

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