>
> I've read in the doc that widgets are the fundamental part of tiddlywiki
> and that all wiki syntax sugar is finally resolved as a number of widgets.
>
> Use of template is only described with transclusion as {{||template}}
> (with tiddler or field or index before ||).
>
> the transclude widget has no template attribute.
>
> How then is done the transclusion? Shouldn't the transclude widget have a
> template attribute?
>
Actually, the *template *is what's being transcluded during a transclusion,
not the tiddler. When you transclude a tiddler through a template, the
current tiddler is set to that tiddler and then the template is transcluded.
{{Tiddler||Template}} evaluates to:
<$tiddler tiddler=Tiddler>
<$transclude tiddler=Template/>
</$tiddler>
{{||Template}} doesn't change the current tiddler and so evaluates to
simply:
<$transclude tiddler=Template/>
{{Tiddler1}} is shorthand for {{Tiddler1||Tiddler1}}, and evaluates to:
<$tiddler tiddler=Tiddler1>
<$transclude tiddler=Tiddler1/>
</$tiddler>
More on templates and current tiddlers
<https://groktiddlywiki.com/read/#Templates%20and%20the%20Current%20Tiddler>
from
my TiddlyWiki textbook.
> Also, I've come across $:/tags/ViewTemplate which is only described as:
> "The system tag <https://tiddlywiki.com/#SystemTags> $:/tags/ViewTemplate
> marks the view template." which is not very telling.
>
I've done tenplates tgat work fine. They are not
> tagged $:/tags/ViewTemplate. If I tag them as scuch, they act aout as if
> their content was twice included. What does $:/tags/ViewTemplate really do?
> How should it be used?
>
Haha, some of those tag explanations could use some work. TiddlyWiki just
transcludes all the tiddlers with that tag in sequence when it is rendering
each tiddler:
<$list
filter="[all[shadows+tiddlers]tag[$:/tags/ViewTemplate]!has[draft.of]]"
variable="listItem">
<$transclude tiddler=<<listItem>>/>
</$list>
So the view template is essentially a list of templates that get
*automatically* transcluded for every tiddler without mentioning them in
your wikitext. This includes things like the title, the tags bar, and so on.
More on the view template
<https://groktiddlywiki.com/read/#The%20View%20Template>.
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