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Re: Firefox update caused a syntax error in a script

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Dave Farrance wrote:

> The "Greased Webcomic Manager" is a "greasemonkey" script that broke with
> the update of Firefox from 16.0.2 to 17.0.  Firefox's "error console" now
> shows a syntax error on line 1061.  i.e.:
> 
>    TN.gwm.css = <><![CDATA[
> 
> which is just past the halfway mark down this script file:
> 
>    http://userscripts.org/scripts/review/74760
> 
> That's beyond my limited understanding of Javascript,

That much is obvious, because there is no “Javascript”.

<http://PointedEars.de/es-matrix>

> so could anybody tell me why the syntax is bad?  I'm asking because a
> reviewer noted that the script had broken seven weeks back but the
> developer hasn't appeared yet, so I'm hoping that a simple patch will fix
> it.

The right-hand side (RHS) is part of ECMAScript for XML (E4X, ECMA-357), 
which allows you to use XML markup verbatim in ECMAScript-based scripts, 
resulting in an XML object (XML instance).  The first line of the RHS is the 
start-tag of an anonymous element followed by the left-hand side delimiter 
of a CDATA section.

<http://www.w3.org/TR/2008/REC-xml-20081126/#sec-cdata-sect>

Unfortunately, E4X never had cross-implementation (and thus cross-browser) 
support, and support has been disabled in (Mozilla) JavaScript for non-
privileged code (such as GreaseMonkey scripts) in Firefox 17.  The feature 
is going to be removed from the codebase in Firefox 20:

<https://developer.mozilla.org/en-US/docs/E4X>

Your From header field value is invalid; please fix.

-- 
PointedEars

Twitter: @PointedEars2
Please do not Cc: me. / Bitte keine Kopien per E-Mail.

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Thread

Firefox update caused a syntax error in a script Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2013-01-23 14:01 +0000
  Re: Firefox update caused a syntax error in a script Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-23 16:24 +0100
    Re: Firefox update caused a syntax error in a script Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2013-01-23 17:28 +0000
      Re: Firefox update caused a syntax error in a script Danny <dann90038@gmail.com> - 2013-01-23 12:33 -0800

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