ISSUE-17: Vertical tab preprocessing for media queries


Vertical tab preprocessing for media queries

HTML 5 spec
Raised by:
Shawn Medero
Opened on:
## Summary

> Please define a preprocessing step that turns vtabs into spaces before
media query parsing.

Raised by Henri Sivonen [on IRC][3] and [the mailing list][1] in response to [a discussion that occurred on the www-style list][2].

> <hsivonen> Hixie: did you see the whitespace discrepancy point I mentioned on www-style?
> <hsivonen> Hixie: If you've told me why vertical tab is space in HTML5, I have forgotten
> <Hixie> whitespace means several things just within HTML5
> <Hixie> let alone when compared to other specs like Unicode, XML, JS, or CSS, each of which has their own definition
> <Hixie> iirc VT is included because implementations include it
> <hsivonen> OK. In that case, I suggest media queries should inherit the set of white space characters from the host language
> <hsivonen> as a conformance requirement, it would be highly silly that VT in HTML5 were ok between class name tokens but not between media query tokens
> <Hixie> or i could define a preprocessing step in HTML5 to normalise the whitespace first
> <Hixie> (for media queries(
> <Hixie> ))

Related Actions Items:
No related actions
Related emails:
  1. Issues closed (from on 2009-08-20)
  2. {agenda} HTML WG telcon 2009-08-20 (from on 2009-08-19)
  3. Old issues - will be closed on 2009-08-20 if there are no objections (from on 2009-08-13)
  4. ISSUE-17: media-queries-tab-preprocessing - suggest closing on 2009-08-20 (from on 2009-08-13)
  5. Re: {agenda} HTML WG telcon 2009-08-13 (from on 2009-08-12)
  6. Re: {agenda} HTML WG telcon 2009-08-13 (from on 2009-08-12)
  7. {agenda} HTML WG telcon 2009-08-13 (from on 2009-08-12)
  8. Regarding closing issues (from on 2009-08-11)
  9. More suggestions for issues to be closed (from on 2009-08-11)
  10. ISSUE-17 (media-queries-tab-preprocessing): Vertical tab preprocessing for media queries [HTML 5 spec] (from on 2007-11-14)

Related notes:

No additional notes.

Display change log ATOM feed

Paul Cotton <>, Maciej Stachowiak <>, Sam Ruby <>, Chairs, Michael[tm] Smith <>, Staff Contact
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <>.
$Id: index.php,v 1.325 2014-09-10 21:42:02 ted Exp $