Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.teledata-fn.de!newsfeed.arcor.de!newsspool4.arcor-online.net!news.arcor.de.POSTED!not-for-mail
Content-Type: text/plain; charset="UTF-8"
Message-ID: <1760651.JUsAPRdEKB@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Fri, 22 Nov 2013 11:56:53 +0100
User-Agent: KNode/4.10.5
Content-Transfer-Encoding: 8Bit
X-Face: %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&.<b';Md8`dH6iqhT)6C^.Px|[=M@7=Ik[_w<%n1Up"LPQNu2m8|L!/3iby{-]A+#YE}Kl{Cw$\U!kD%K}\2jz"QQP6Uqr],./"?;=4v
Face: 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
Subject: Re: How to feature test for window.ActiveXObject?
Newsgroups: comp.lang.javascript
References: <5287c664$0$9504$9b4e6d93@newsspool1.arcor-online.net> <1581559.TFT1m0cKLP@PointedEars.de> <9408b50a-9b19-4307-a30f-7ffdd7ca3eb1@googlegroups.com>
MIME-Version: 1.0
Lines: 52
NNTP-Posting-Date: 22 Nov 2013 11:57:33 CET
NNTP-Posting-Host: 98614c63.newsspool4.arcor-online.net
X-Trace: DXC=IJC\X[?dgKOWDmlTRbh@=I4IUK<Cl32<A4Fo<]lROoRA8kF<OcfhCOKZ60UQ4YM3<LDZm8W4\YJNLYUVHKH;GI^GKL[1=F<ohUN_l\719ZmU7B
X-Complaints-To: usenet-abuse@arcor.de
Xref: csiph.com comp.lang.javascript:22127

Michael Haufe (TNO) wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Depends.  try…catch at least is the only reliable way to determine
>> whether a host object of a certain class (sic!; as in CLSID) can be
>> successfully created when “ActiveXObject” is called as a constructor
>> where try…catch is supported (that would apply to these versions of
>> JScript).
> 
> An alternative which still seems to work:
> 
> <!doctype html>
> <html lang="en" dir="ltr">
>     <head>
>         <meta charset="utf-8">
>         <title>clsid test</title>
>     </head>
>     <body>
>         <object id="wmv" width="100%" height="100%"
>         classid="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6">
>         </object>
>         <object id="xhr" width="100%" height="100%"
>         classid="CLSID:F5078F35-C551-11D3-89B9-0000F81FE221">
>         </object>
>         <script type="text/javascript">
>             var wmv = document.getElementById("wmv"),
>                 xhr = document.getElementById("xhr");
>         </script>
>     </body>
> </html>
> 
> The first is windows media player, the second is Msxml2.XMLHTTP.3.0

Curious.  The “classid” attribute is not listed under “content attributes”, 
but it is ascribed meaning in the prose:

<http://www.w3.org/TR/2012/CR-html5-20121217/embedded-content-0.html#the-object-element>

This has not changed in the latest Editor's Draft (22 November 2013):

<http://www.w3.org/html/wg/drafts/html/CR/embedded-content-0.html#the-object-element>

However, I do not see how that could be be used to detect support for a 
certain COM class.  The element is there no matter whether the class is 
supported.  Besides, does there have to be a CLSID for each server type?  
What about non-HTML use?

-- 
PointedEars

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