Hi Mohammad
Just to clarify what’s going on, the filter expression
"[$filter$allbefore:include{!!current-item}]” is interpreted as an invocation
of the filter operator “$filter$allbefore” (the $filter$ is treated literally
since we’re not inside a macro) with the suffix “include” and the operand
transcluded from the “current-item” field of the current tiddler. Because there
usually isn’t such a field present, the operand will be read as a blank string.
Meanwhile, because the filter operator doesn’t exist, the system falls back to
using the “field” operator, making the whole expression equivalent to
“[field:include[]]” which will look for tiddlers with a blank field “include”.
Perhaps unexpectedly, the “field” operator treats tiddlers with a missing field
as if the field was blank.
By the way, the technique I used to explore this filter was to run the
following in the developer console of tw5.com <http://tw5.com/>:
$tw.wiki.parseFilter("[$filter$allbefore:include{!!current-item}]")
The result is a simple JSON representation of the syntax tree, which can help
you to understand how the system is seeing the filter.
Best wishes
Jeremy.
> On 17 Oct 2018, at 15:51, Mohammad <[email protected]> wrote:
>
> Yes, the filter is empty so, why the .js tiddler are transcluded?
>
> The first tiddler transcluded is $:/library/sjcl.js
> <https://tiddlywiki.com/#%24%3A%2Flibrary%2Fsjcl.js>
>
> Why allbefore empty is some .js tiddlers?
>
> I expect an empty result.
>
> Mohammad
>
>
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