Using Javascript to Detect Script Support in a Browser

From: Andrew West (
Date: Thu Jun 17 2010 - 08:27:23 CDT

  • Next message: Ed Trager: "Re: Using Javascript to Detect Script Support in a Browser"

    On 17 June 2010 06:51, Marc Durdin <> wrote:
    > I'd love to see that in Javascript.  Of course then you need to know if it will shape correctly as well for it to be useful to the end user.  Dotted circles are only marginally better than square boxes.  And that's a much harder question to answer...

    [resending to the list a message I accidentally sent only to Doug]

    And plenty of fonts have cmap mappings for characters with either a
    blank glyph or a notdef glyph -- in most cases because these were
    reserved code points when the font was created, but are now valid
    characters. Or there are fonts like HAN NOM B, which puts a load of
    CJK glyphs at the end of the CJK-B block in the mistaken belief that
    it is OK to use reserved code points for private purposes, but now
    these previously reserved code points are part of CJK-C and it gives
    the false impression of having CJK-C coverage when in fact they are
    just a bunch of random CJK glyphs accidentally occupying CJK-C code


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