PS to my last: have fixed part of the problem: by adding the suffix clause 
back into macro (as below), it now pulls not a system-level error msg, but 
the error msg from wikipedia.org site itself, which seems to be objecting 
to the .html extension only... yet i can't find a way to remove that w/o 
reverting to the lower-level error msg.  Any insight about this problem 
would be appreciated!  /walt
 8<-----(snip)----->8

\define AddTopic( topic )
<option value={{{ [[$topic$]split[ 
]join[%2520]addprefix[https://en.wikipedia.org/wiki/]addsuffix[.html]] 
}}}>$topic$</option>
\end

 8<-----(snip)----->8

On Saturday, April 24, 2021 at 10:59:27 AM UTC+1 ludwa6 wrote:

> Amazing:  Adding topics from tiddlywiki.com/static to browse from within 
> my own TW instance is a cinch, i find.  Have added an entry for "WikiText", 
> and now i can drill down in 2 clicks for a quick how-to that saves me a 
> good minute or few of context-switching penalty, that will quickly amount 
> to hours of time saved.  Even if that's all we do with it, i can't imagine 
> why anyone would NOT such a documentation utility in their wiki.  Certainly 
> i'll be including this in all my instances from now on.
>
> Now going further: I'm wondering how this might be adapted to other 
> reference sites, even if non-tiddly; could this be possible?  I cloned the 
> tiddler from your latest upload, @Charlie, to see if i can adapt it to pull 
> from my most-commonly referenced site: wikipedia.org.  Called my new 
> tiddler "Wikipedia", changed every instance where your code calls "TW Ref" 
> to a "Wikipedia" call, and swapped in https://en.wikipedia.org/wiki/ as 
> the base URL -deleting the suffix .html, since wikipedia doesn't use that, 
> interestingly.  Now i've got a "Wikipedia" tab in my sidebar, with a new 
> pulldown list for the 3 Wikipedia topics i added, so the UI works fine... 
> But this new utility pulls no content, save the error msg:  "It may have 
> been moved, edited or deleted."
>
> So i'm wondering: is there a bug in my adaptation of code appended below? 
> Or is there some more fundamental problem -like maybe it only works with a 
> TW static site?
>
> /walt
>
> 8<-------(snip)------->8
>
> \define AddTopic( topic )
> <option value={{{ [[$topic$]split[ ]join[%2520]addprefix[
> https://en.wikipedia.org/wiki/ }}}>$topic$</option>
> \end
>
> <$select tiddler={{Wikipedia!!title}} field="curr-topic">
> <!--🔴 AddTopic takes as input tiddler titles from wikipedia.org  and  
> creates a link to same tiddler at the static site.
>              Add/modify/remove items as per the following three examples
>              Order the topics as per your preferences
>              Add   "optgroup elements to group entries" -->
> <<AddTopic  "TiddlyWiki">>
> <<AddTopic  "WikiWikiWeb">>
> <<AddTopic  "Project_Xanadu">>
> </$select>&nbsp;&nbsp;<a href={{Wikipedia!!curr-topic}} title="Open web 
> page in a separate window/tab"  target="_blank">link</a>
> <iframe  src={{Wikipedia!!curr-topic}} height="500" width="100%"></iframe>
>
> 8<-------(snip)------->8
>
> On Friday, April 23, 2021 at 6:32:07 PM UTC+1 cj.v...@gmail.com wrote:
>
>> G'day walt (I'm not sure I'm comfortable writing slash walt ...)
>>
>> Oh no, not from TiddlyWiki.com.
>>
>> From tiddlywiki.com/static/
>>
>> So the static pages exported to TiddlyWiki.com/static, not theTiddlyWiki 
>> instance itself (that you get at tiddlywiki.com).
>>
>> Embedding content from a whole TiddlyWiki instance would be way too slow 
>> performance-wise for this kid.
>>
>> Individual static pages on request, that's pretty fast.
>>
>> Please, do take a look at the last attachment I posted in this thread 
>> yesterday (April 22):  unzip that attachment, import the tiddler into any 
>> tiddlywiki (I like to try things right in tiddlywiki.com).
>>
>> If you have any questions about the content in that tiddler or how to add 
>> other items in that select widget, get back to me/us here....
>>
>

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